Showing posts with label tokyo. Show all posts
Showing posts with label tokyo. Show all posts

Friday, May 6, 2011

Earthquake Sickness - Japan Earthquake Update April 25, 2011

The following is part of a series of email updates about the effects of the earthquake in Japan. The emails originated from a colleague in Tokyo and provide an insiders perspective. These posting have been unedited and tell the story from one person's vantage point

April 25, 2011

Total aftershocks over the past 2 weeks are as follows:

Lunchtime 11th April to 18th April – 246
Lunchtime 18th April to 25th April – 121

Cherry blossom-viewing season in the Tokyo area is over and is now moving up North through the worst affected regions on the way to its inevitable conclusion in Hokkaido in mid-May.

North East Report
The status of the NE area has shown some improvement over the past week, but still has a long way to go in the worst hit areas.
  • Toll of dead and missing still hovering around the 28,000 level, seems in excess of 90% of victims were indeed victims of the Tsunami (i.e. drowning) and not the Earthquake itself.
  • The number of SDF & US military personnel searching in earnest all over the worst affected areas (including some within the 20km restricted zone) is being ramped up from 12,000 to 20,000+
  • Prices of used cars are reportedly increasing rapidly, estimates are that about 10% of all vehicles in the region were destroyed.
  • Food and fuel logistics to the worst regions continues to improve, but still hearing of isolated hamlets and villages where relief is only just arriving over the past 2 weeks.
  • Cherry blossom-viewing season has now commenced in the worst affected regions signaling the imminent, and no doubt most welcome, arrival of warmer weather.
  • A veritable string of foreign dignitaries have been visiting the worst affected areas, handing out all sorts of things, some useful, some not. Can’t see why they cannot organize a shipment of 30 to 40 front-end loaders and 20 or 30 bulldozers which would be pretty useful right about now.
  • Plenty of focus still on the nuclear reactor in Fukushima, refer “Nuclear Situation” below.

Tokyo Report
In regard to getting back to normal, Tokyo has now arrived at the stage where it can be considered “business as usual”, except for any business that would normally be conducted with suppliers/clients up North of course.

Food supplies are almost back to normal, with almost no empty spaces on store shelves than last week. Supplies of bottled mineral water (2.0 liter PET bottles) are available once again, but supplies still rather limited.

Main remaining problem for the non-tsunami areas is achieving regular factory production, refer business perspective below.

Blackouts - Discontinued
These blackouts have been discontinued for the time being, but may have to be reinstated over the hottest summer months.

Situation
I see no reason to change the wording of the summary I wrote 2 weeks ago which is as follows:
    “Progress with closing down the remaining 3 reactors continues at a snails pace as one problem after another arises to slow efforts”.
Main focus is now clearing the most radioactive debris and getting more control over the whole situation, including the use of remotely controlled equipment. Therefore the situation is still far from resolved and vigilance is still required” (I am disappointed to still be repeating this same conclusion, however am being given no real choice otherwise)

Government has now introduced a “legally binding 20km exclusion zone” around the reactor and a few additional selected areas, and all remaining residents are being asked to evacuate, seems they are not being forcibly evacuated just yet.

An article came out last week claiming that most nuclear reactor sites (worldwide) are uninsured simply due to the very high cost of doing so.

Another article came out detailing how the Power Company had decided to make compensation payments to the victims of JPY 1,000,000 (approx. USD 12,500 at current rates) per family. Anyone who knows anything about Japan will know this is woefully inadequate, and the power company promptly found themselves in very hot water once again.

Aftershocks and Seismic Data
Caution is still required as there have been 367 in total since my last report 14 days ago including several very big ones, as per the data below.

Lunchtime 11th April to 18th April – 246
Lunchtime 18th April to 25th April – 121

Looks like a “normal week” is going to be around 90-120 for the time being.

Another story from the seismological community came out last week which claimed all recent seismological protection activities have been focused on the South-Western Japan (where the Philippine and Eurasian plate intersect), as it was considered the next “high-risk area”. Not surprisingly, the article claimed the assessment approach was flawed and should be abandoned.

Another article emerged during the week in regard to “Earthquake Sickness”, details are as follows:
    Phantom quakes and Japan's 'earthquake sickness' Aftershocks are fraying the nerves of survivors in Japan. And some people feel them even when the ground is perfectly still As if the grief of loved ones lost isn't enough, Japanese survivors are now suffering from "earthquake sickness," with symptoms like dizziness and anxiety. The residents of northeastern Japan live with constant reminders of the powerful March earthquake that sent a deadly tsunami crashing into their shores. Aftershocks occur almost daily. And many survivors sometimes feel the ground shaking even when it is not. Doctors say the sensation is just one of the symptoms of the "earthquake sickness" that many survivors now have to contend with, on top of everything else. Here, a brief guide:
      What is "earthquake sickness"? The term refers to a collection of sensations earthquake survivors sometimes experience, even long after the ground stops trembling. The main symptom is dizziness, which doctors in Japan have seen a lot of lately. The condition is "similar to motion sickness," says Dr. Hideaki Sakata of the Mejiro University Clinic, as quoted by AFP. But for people worried the next deadly temblor could hit at any time, another symptom — the phantom quake — can be the most stressful. What is a phantom quake? It's when someone is convinced the Earth is rumbling under his feet although, in reality, it is perfectly still. "Sometimes I'm sitting with my friends and I tense up and say, 'Do you feel that?'" says Wakana Oyamada, an office worker in Shibuya, as quoted by The Irish Times, "and they haven't because it was in my imagination." Dr. Sakata says the sensation is similar to the lingering feeling of swaying people sometimes experience when they first get off a boat. Are there any other symptoms? Yes, anxiety. Understandably, earthquake survivors commonly worry that another Big One could happen at any moment. That concern has been impossible to ignore in northeastern Japan. The area devastated by the quake and tsunami on March 11 had been rattled by more than 400 aftershocks of magnitude 5.0 or greater, with more than 65 of magnitude 6.0 or higher, and at least five of magnitude 7.0. Every one of them had the potential to push a few more people past the breaking point. Has this hit the Japanese harder than earthquake survivors elsewhere? Quite possibly. In Japan, every time an aftershock is strong enough to rattle the walls, people wonder whether it will send another tsunami crashing into the damaged Fukushima nuclear plant, releasing a new burst of radiation. "People are getting too sensitive," says Dr. Kazuhiro Soeda, as quoted by The New York Times. "This is something we've never experienced before."

The “Tokyo Big-One” or not?
This is the other discussion going on in some sectors locally.

The general consensus at this point in time is “unfortunately not” as this quake was centered much further North, and all aftershocks have been almost focused mainly along the “Pacific Plate / Nth American Plate” boundary, also in the below diagram.


Business Perspective
  • Economic Impact
    Forecasts are gradually being revised downwards for the March and June quarters, but being revised upwards after that due to the reconstruction efforts that will commence.

    Barely any reconstruction has commenced to date however.

    The major economic impact will occur in the Agricultural sector, which does nor bode well for food prices this year.
  • Factory Closings
    Number of closings now gradually starting to reverse, however the number of factories unable to resume full production has stabilized and shows no dramatic sign of improvement just yet.

    Toyota has resumed production at all facilities but it cannot increase to more than 50% capacity levels.

    There is no reason to conclude any other major (or not) domestic manufacturers are any better off then Toyota, even though Honda, whose facilities are mainly located much further south, is reputed to be in better condition although not completely unaffected.

    A negative effect on overseas supply chains is still being reported, but the extent. Particularly to non-Japanese entities is difficult to gauge from here.

    This matter still warrants further monitoring as the full effect of the disruptions may not yet be fully played out
  • Economic Recession Likelihood is unchanged

    For the current QTR, this is unchanged and considered almost a certainty but only at marginally negative growth levels, for the next QTR it is also considered quite likely with the magnitude dependent on how quickly the problems associated with the JIT system in b) above can be remedied.

    Subsequently the growth positive effects of rebuilding should gradually become more evident from around the September quarter and serve as a base for subsequent rebounds in GDP, no reconstruction efforts are underway at the present time however, cleanup activities are yet to get into full swing.
  • Financial Markets
    Would think the Securities analyst’s are all busy revising forecasts and valuations (downwards) for all local public companies.

    Funding of reconstruction efforts – Discussion now underway to increase the Consumption Tax rate and use the initial increase in receipts to fund reconstruction, nothing decide yet however.

Tuesday, May 3, 2011

Still Shaken from Sizeable Aftershocks (7.0+) - Japan Earthquake Update April 11, 2011

The following is part of a series of email updates about the effects of the earthquake in Japan. The emails originated from a colleague in Tokyo and provide an insiders perspective. These posting have been unedited and tell the story from one person's vantage point

April 11, 2011

Here is an update on the situation in Japan which I originally compiled as of lunchtime Monday 11th April 2011.

However, following yet another major aftershock (7.1 Richter Scale) late in the afternoon on the 11th, which was pretty much right at the problem reactor site by the way, the tectonic situation has changed dramatically with approx. 85 additional aftershocks over the past 20 hours alone, with another major one this morning at 8.15 (of strength 6.3) but with an epicenter very close to Tokyo in Chiba. Refer “Aftershock and Seismic” section below for details.

Over the past week, mother nature delivered 2 reminders to keep us focused on tectonics as well as remind us of the need to keep moving forward.
  • The first of 3 very large aftershocks on Thursday evening around 11.30 pm served to keep us all focused on the (still existing) tectonic problems at hand. The second and third ones occurred at 5.16pm on Monday and 8.15 am on Tuesday with a dramatic pick-up in overall frequency.
  • The cherry blossom season is now in full swing in and around Tokyo reminding all that life goes on. It was not being celebrated with the usual merriment, as earthquake reminders abound, but was celebrated extensively nonetheless.
North East Report
The status of the NE area has shown some improvement over the past week, but still has a long way to go in the worst hit areas.
  • Toll of dead (13,000) and missing (14,000) has actually fallen back from an earlier total of approx. of 30,000, but in excess of 150,000 still in temporary shelters in the worst affected regions.
  • Emergency housing has just started to become available (by lottery), but a great deal more needed.
  • 12,000 SDF & US military personnel now searching in earnest all over the worst affected areas including some within the 20km restricted zone.
  • Convenience store chains report that number of stores still closed has dropped dramatically from 40% (of some 3400) to about 6.0% now.
  • Much of the focus still on the nuclear reactor in Fukushima, refer “Nuclear Situation” below.
Tsunami height – May have been much higher than originally thought, getting more reports of the Tsunami having been funneled to heights of up to 30 and 40 meters.

Tokyo Report
In regard to getting back to normal, Tokyo has almost arrived at the stage where is can be considered “business as usual”.

Food supplies are almost back to normal, with even less empty spaces on store shelves than last week. Supplies of bottled mineral water (2.0 liter PET bottles) starting to become available once again, but supplies are very limited.

Main remaining problem for the non-tsunami areas is achieving regular factory production, refer business perspective below.

Blackouts - Continue
These blackouts continue, but are scheduled for termination in the next week or 2. They may be reinstated over the summer months however.

Nuclear Situation
Progress with closing down the remaining 3 reactors continues at a snails pace as one problem after another arises to slow efforts. Main focus is now the radioactive water that has been released into the ocean and other water slated for storage, therefore the situation is still far from resolved and vigilance is still required.

Government is mulling the introduction of a “legally binding exclusion zone” around the reactor, not that there isn’t one at the present time of course, but seems the present one is voluntary and a number of residents have been returning to their homes to collect belongings etc.

Aftershocks and Seismic Data
Caution is still required as there have been 98 in total since my last report 7 days ago including one very big aftershock last week, as per the data below. To this I must add the additional 84 or so (in dark blue font below) since 11.14 Monday morning to 9.15am today.

Looks like this week’s total is going to be way above last week’s of 98, therefore it is still too early to conclude everything is “settling down to normal levels”.

Intensity maps of the 3 major aftershocks on Thursday evening, Monday afternoon and this morning are as follows:

Thursday Evening
Note : The epicenter is not very far from the reactor location in Fukushima, which caused some concerns about additional reactor damage.

Monday afternoon – 17.16pm – Epicenter was also pretty much right at the reactor site in Fukushima, and at least briefly, cut power to the plant.

Tuesday Morning 8.12am – Not as strong as above 2 shocks, but much closer to Tokyo, so was felt at about the same intensity.

Business Perspective
  • North-East Area – Economic Impact

    Share of Japan GDP which the worst hit areas account for is being estimated to be around 6.0%, not all of which will be lost due to the quake and tsunami’s, however the situation in regard to b) below is still worsening.
  • Factory Closings
    • Number of closings now slowing down, however the number of factories unable to resume full production continues to grow, e.g. Toyota which is aiming to resume production at all facilities this week, only it cannot do so at more than 50% capacity levels.
    • There is no reason to conclude any other major (or not) domestic manufacturers are any better off then Toyota.
    • A negative effect on overseas supply chains is also now being reported.
    • This matter warrants further monitoring as the full effect of the disruptions may not yet be fully played out.
  • Economic Recession Likelihood is unchanged
    • For the current QTR, this is unchanged and considered almost a certainty but only at marginally negative growth levels, for the next QTR it is also considered quite likely with the magnitude dependent on how quickly the problems associated with the JIT system in b) above can be remedied.
    • Subsequently the growth positive effects of rebuilding should gradually become more evident from around the September quarter and serve as a base for subsequent rebounds in GDP.
  • Financial Markets
    • Would think the Securities analyst’s are all busy revising forecasts and valuations (downwards) for all local public companies.
    • It still remains to be seen whether the BOJ will actually print money to fund reconstruction efforts, the Governor is refusing to do so and many others think it is not necessary anyway as there is still plenty of domestic savings to tap into to. The pressure to do so is coming from some political quarters, ostensibly for nation economic benefit, which very few financial market participants find very credible.
  • March 31 Fiscal Year End
    • Has passed without any major lingering problems, and should be considered another sign that all is gradually getting back to normal.
Stay or Flee? – The “Flygin” Discussion
This discussion is over, recommendations were provided in the last update.

Friday, April 29, 2011

Situation Still Bad - Japan Earthquake Update April 4, 2011

The following is part of a series of email updates about the effects of the earthquake in Japan. The emails originated from a colleague in Tokyo and provide an insiders perspective. These posting have been unedited and tell the story from one person's vantage point

April 4, 2011

North East Report
The status of the NE area remains bad across the board, still not enough food, fuel, clothing etc. reaching the right places.

Toll of dead (11,578) and missing (16,451) continues to climb every day and is now is excess of 30,000, with in excess of 150,000 still in temporary shelters in the worst affected regions.

A massive search operation to locate larger numbers of the missing commenced on Saturday 2nd April in tandem with the commencement of Spring tides that makes it easier to spot bodies when the tide ebbs. The 30kn exclusion zone around the problem reactor side is not included in search operations for the time being.

Much of the focus still on the nuclear reactor in Fukushima, refer “Nuclear Situation” below.

Tsunami Height
May have been much higher than originally thought:
    Researchers: 30-meter tsunami in Ofunato
    The latest research on the March 11 tsunami that slammed into Ofunato city in Iwate Prefecture, northern Japan shows that it was nearly 30 meters high.
    A joint research team from Yokohama National University and University of Tokyo surveying the Ofunato city shoreline made the discovery.
    They found fishing equipment scattered on the high cliff of the city's Ryori Bay and have determined the tsunami reached as high as 29.6 meters.
    The research group says the great height of the tsunami was formed by the shape of the narrow bay. They will continue to survey traces of the tsunami to clarify the scale the tsunami.
Tokyo Report
In regard to getting back to normal, Tokyo continues to make quite good progress overall.

Major fiscal Year-End on Thursday 31st March appears to have passed without any lingering earthquake problems.

Food supplies are gradually returning to normal levels, currently estimated to be around 85% of “normal levels”, but there are still blank spaces on many store shelves for items still out of stock which are not being replenished or diverted North-east.

Business is also getting back to pre-quake “normal levels” with the exception of factory production in some areas, refer business perspective below.

Blackouts - Continue
Areas subject to blackouts have been divided into 5 regions each comprising approx. 4 sub-regions. Blackout schedule is posted on Tepco’s (power company) website in Japanese. These blackouts are also being cancelled on a fairly frequent basis as one and all make efforts to conserve electricity and thereby render them redundant.

These rolling blackouts interfere with factory production of a whole range of goods however, and cannot be considered positive for the economy, refer also “Business Perspective” below.

The area in which I live (near Tokyo Disneyland) was recognized as an “officially damaged area” 2 weeks ago, and is therefore exempted from any further blackouts, and has had a lot of repair work (roads, water-pipes, gas mains etc.) completed since that time. Residents of some areas still queuing up for daily supplies of drinking water however.

Drinking Water
The situation in regard to bottled drinking water supplies is no longer in panic mode, however the larger PET bottles of bottled mineral water are still reserved exclusively for families with young children. Smaller bottles of mineral water are still around and available to all however.

Radioactivity readings at all fresh water treatment plants in the Tokyo area have fallen back well below levels considered safe for infants less than 1 year old as anticipated earlier, this is due to the very short half-life of the isotope in question – 8 days.

Nuclear Situation
Power now connected to all reactors, attempts underway to restart back-up systems, and efforts continue to plug the current cause of most concern, the radiation leak into the ocean.

Overall progress is being made, but it is still frustratingly slow progress, therefore still far from resolved and vigilance is still required.

The big unknown surrounding the nuclear situation is what radioactive isotopes are being leaked/emitted and how dangerous they are respectively. Readings taken by the IAEA late last week raised concerns yet again due to the fact they detected Cesium 137 in some of their readings in a small village not far from the reactor where approx. 100 people are still in residence.

The following is from MIT’s “Nuclear Information Hub” website:
Yield
6.80%
6.30%
6.30%
6.10%
6.10%
5.80%
2.80%
2.30%
1.10%
0.70%
0.40%
0.40%
0.30%
0.20%
Fission Product
cesium-133/134*
iodine-135 / xenon-135
zirconium-93
cesium-137
molybdenum-99 / technetium-99**
strontium-90
iodine-131
promethium-147
samarium-149
iodine-129
samarium-151
ruthenium-106
krypton-85
palladium-107
Half-life
2 years
7 hours
1.5 million years
30 years
200,000 years
30 years
8 days
3 years
not radioactive
15 million years
90 years
1 year
11 years
7 million years

Building Nuclear Reactors in an Earthquake prone country
Japan has many Nuclear Power plants, so why hasn’t this happened before? Is the question on the minds of many.

Apparently this is not the first reactor to be damaged by an earthquake (and Tsunami in this case) in Japan, back in 2007 (when there was a big earthquake in Niigata) there was some damage to a plant on the other side of the country, refer “Kashiwaki Kariwa” location in the below diagram:
The “Tokyo Big-One” or not?
This is the other discussion going on in some sectors locally.

The general consensus at this point in time is “probably not” as this quake was centered much further North, and all aftershocks have been almost exclusively along the “Pacific Plate / Nth American Plate” boundary, also in the above diagram.

Some are expressing the concern this quake may have placed extra pressure on other fault lines closer to Tokyo, however others have countered this cannot be assumed with any degree of certainty yet.

Aftershocks and Seismic Data
Seems that I will be able to say once again that despite the fact the number of aftershocks is not in any real decline, the average severity does seem to have fallen somewhat. Caution is still required however as there have been 119 in total since my last report 6 days ago.

Business Perspective
  • North-East Area – Economic Impact
    Share of Japan GDP which the worst hit areas account for is being estimated to be around 6.0%, not all of which will be lost due to the quake and tsunami’s, however situation in regard to b) below is worsening.
  • Factory Closings
    Number of closings due to inability to secure key production parts/components is increasing. This is leading many to consider relocating production elsewhere for the time being at least.
    This is due to the Just-in-time inventory system which keeps inventories of production components at low levels and will affect Japan’s GDP for the March and June quarters at least.
    Despite several forecasts for only minor negative impact on GDP, this factor also warrants vigilance, as it could easily have a much larger impact if the “production recovery” assumptions in some of these forecasts prove too rosy.
  • Economic Recession Likelihood is unchanged
    For the current QTR, this is considered almost a certainty but only at marginally negative growth levels, for the next QTR it is also considered quite likely with the magnitude dependent on how quickly the problems associated with the JIT system in b) above can be remedied.
    Subsequently the growth positive effects of rebuilding should gradually become more evident and serve as a base for subsequent rebounds in GDP.
  • Financial Markets
    Saw a program guest on CNBC over the weekend describe the (initial) foreign press coverage of the whole incident (Quake, Tsunami and Nuclear problem) as “an inverted pyramid of piffle” which I do agree with in relation to the initial coverage, i.e. the first 2 weeks or so, however there is growing evidence that the more recent coverage has been more in line with reality and the local coverage.
  • March 31 Fiscal Year End
    Has passed without any major lingering problems, and should be considered another sign that all is gradually getting back to normal.
    A colleague and I drover to an area approx. 100km North of Tokyo (i.e. approx 140km from the Fukushima plant) to assist with some Year-End activities on Thursday evening, there was no sign of anything abnormal happening, apart from some businesses closing earlier to conserve electricity.
Stay or Flee? – The “Flygin” Discussion
This discussion degenerated into a spiteful affair between 4 or 5 individuals, so I doubt we are going to get any constructive conclusions from it at all.

However, for the record, here some personal recommendations from yours truly:

In the event anyone finds themselves caught up in an event of such magnitude:
  • Make arrangements to get your family out of any affected area immediately
    By this, I do not mean just get them out of the worst affected Tsunami areas, I mean get them out of anywhere that “business as usual” cannot be conducted from the next day (inclusive of many parts of Tokyo in this instance) to a safer location in-country, or overseas

    This is because we all should anticipate some severe infrastructure damage to occur with an event this size and therefore it is probably not wise to keep your families close-by “for the sake of being close-by”, i.e. in this regard the nuclear power plant situation in Fukushima is nothing more then additional infrastructure damage.
  • Attend to your work related responsibilities, if you have them.
    By this I do not mean contact all your staff and merely ask if they are okay, give them the same opportunity to get their families out of the affected areas as well.
  • Anticipate a food and water buying panic to occur immediately by people who are not well prepared for such an event (and even by some that are)
    By this I mean don’t let such responses catch you by surprise and therefore plan ahead (refer next point)
  • Prepare in advance, i.e. as much as you can in any case
    By this, I do not mean have a few extra bottles of mineral water stored in the kitchen, I mean conduct a full risk analysis of what you will need to survive a few weeks without basic services and utilities. If you are not willing to do this, you are gambling with the lives of your families in the first place, also if you think conducting a risk analysis is a burden/nuisance of some sort, it is probably better if you do not venture into “such countries” in the second place as historical statistics dictate such events are going to occur at some stage.

    The term “such countries” is not limited to just Japan, but would prominently include such countries (and locations) as Chile, New Zealand, Indonesia, Alaska, California and The Philippines etc. i.e. this list is not an exhaustive list, just the main locations around the Pacific Rim, the point is that the list is a bit longer than you would initially surmise.

Thursday, April 28, 2011

Tokyo Slowly Improving - Japan Earthquake Update March 29, 2011

The following is part of a series of email updates about the effects of the earthquake in Japan. The emails originated from a colleague in Tokyo and provide an insiders perspective. These posting have been unedited and tell the story from one person's vantage point

March 29, 2011
North East Report
The status of the NE area remains bad across the board, still not enough food, fuel, clothing etc. reaching the right places. Toll of dead and missing continues to climb every day and is now is excess of 28,000, with in excess of 150,000 still in temporary shelters in the worst affected regions. The only positive here is that the number of people in shelters has dropped from over 200,000 late last week. Much of the focus still on the nuclear reactor in Fukushima, refer “Nuclear Situation” below.

Tokyo Report
In regard to getting back to normal, Tokyo is still making quite good progress overall.
Food supplies are gradually returning to normal, but there are still blank spaces on many store shelves for items still out of stock which are not being replenished, I can only assume such items are from the NE area. Gasoline rationing is no longer a problem as anticipated earlier.

Blackouts
Main remaining problem is now “rolling blackouts” in some outer Tokyo areas and surrounding areas, these are required as the power company claims it can only supply 70% of regular demand. Areas subject to blackouts have been divided into 5 regions each comprising approx. 4 sub-regions. Blackout schedule is posted on Tepco’s (power company) website in Japanese.

These rolling blackouts interfere with factory production of a whole range of goods, and cannot be considered positive for the economy, refer also “Business Perspective” below. The area in which I live (near Tokyo Disneyland) was recognized as an “officially damaged area” late last week, and is therefore exempted from any further blackouts.

Drinking Water
The situation in regard to bottled drinking water supplies is still in panic mode, but at a lower level than it was last Friday. The larger PET bottles of bottled mineral water are still reserved exclusively for families with young children. Smaller bottles of mineral water are still around and available to all however.

Radioactivity readings at all fresh water treatment plants in the Tokyo area have fallen back well below levels considered safe for infants less than 1 year old as anticipated earlier, this is due to the very short half-life of the isotope in question – 8 days. Most families with young children are still accepting bottled water supplies in any case.

Note
In this case, the drop in readings was thankfully predictable due to being able to ascertain the half-life of the Iodine Isotope in question. It would be encouraging to see more readings on other isotope levels, refer “nuclear situation” report below.

Nuclear Situation
Power now connected to all reactors, attempts are underway to restart back-up systems, cooling systems etc. Progress is being made, but it is still slow progress, therefore still far from resolved and vigilance is still required. Another minor panic earlier this week when much higher levels of radioactive isotopes were detected in the sea just off the reactor location, and in the water which has accumulated on reactor floors.

The big unknown surrounding the nuclear situation is what radioactive isotopes are being leaked/emitted and how dangerous they are respectively. The following is from MIT’s “Nuclear Information Hub” website:
    Fission products remain inside the fuel under normal circumstances. When fuel resides in the core, it contains an amount of fission products proportional to the total energy it generated. When the fuel is depleted, it is moved to spent fuel pools and ultimately to dry cask storage, long-term repositories, or reprocessing facilities. At the Fukushima nuclear power plants, fuel inside the core (and possibly the spent fuel pools) is suspected to have likely been damaged. Because of this, some fission products, especially the gaseous products, have likely been released. We do not currently have enough information to know exactly which (or in what amount) fission products have been released. Not all fission products are harmful. Although a few are gaseous, which enables them to travel long distances through the atmosphere, most are not highly mobile and will thus remain localized near the reactor site. Although nearly all fission products emit radiation, only some are potentially harmful to humans. The chart below lists various important fission products along with their yields – the frequency at which they are produced from fission. For example, 6.3% of fission events (on average) will produce xenon-135 (after the highly unstable fission products rapidly decay). The half-life is a general time scale for how long the listed radioactive fission product will exist before decaying to a more stable fission product. Note that cesium and iodine, which were detected near the Fukushima site, are by far the most frequently occurring radioactive fission product elements.
    Yield
    6.80%
    6.30%
    6.30%
    6.10%
    6.10%
    5.80%
    2.80%
    2.30%
    1.10%
    0.70%
    0.40%
    0.40%
    0.30%
    0.20%
    Fission Product
    cesium-133/134*
    iodine-135 / xenon-135
    zirconium-93
    cesium-137
    molybdenum-99 / technetium-99**
    strontium-90
    iodine-131
    promethium-147
    samarium-149
    iodine-129
    samarium-151
    ruthenium-106
    krypton-85
    palladium-107
    Half-life
    2 years
    7 hours
    1.5 million years
    30 years
    200,000 years
    30 years
    8 days
    3 years
    not radioactive
    15 million years
    90 years
    1 year
    11 years
    7 million years
    *Cs-133 is stable but has a high fission yield, but it will then produce Cs-134 from absorbing neutrons in the reactor and Cs-134 is radioactive with a ~2 year half-life. **Half-life reported in the table is for Tc-99. Mo-99 has a half-life of ~66 hours, which then decays to Tc-99m (metastable form of Tc-99) with a half-life of ~6 hours. The Tc-99m then decays to the Tc-99 with the 200,000 year half-life reported in the table.
Note that longer half-lives do not necessarily mean more danger. Some fission products have extremely long half-lives but emit very little radiation at any given time, so they are not dangerous. Other fission products emit huge amounts of radiation but exist for such a short period of time that they are not dangerous. How harmful a given fission product is to humans is a complicated function of half-life, radiation intensity, and various human biology factors.

Link to the website for those interested is here : http://mitnse.com/2011/03/

Link to an explanation of units of radioactivity measurement : http://web.mit.edu/newsoffice/2011/explained-radioactivity-0328.html

Author’s Notes
  • It was the seventh isotope “iodione-131” that was involved in the fresh water panic last week.
  • Clearly the level of danger is not merely linked to the half-life of each isotope, as it also matters a great deal how rapidly one receives a dose of radiation etc., however being aware of respective half-lives will assist in predicting how long a certain problem may be expected to linger.
  • Local English language newspaper (The Japan Times) this morning details concerns about the effect of longer-life cesium-137 (30 year half life) on seafood, but correctly notes concerns about Iodine 131 will only be very short-term in nature.
Plutonium News – NHK 29th March 2011
    Plutonium found in Fukushima plant soil Tokyo Electric Power Company says plutonium has been found in soil samples from the Fukushima Daiichi nuclear power plant. It says the radioactive substance appears to be related to the ongoing nuclear accident, but the level detected is the same as that found in other parts of Japan and does not pose a threat to human health. TEPCO collected samples from 5 locations around the power plant over 2 days from March 21st and found 2 samples contaminated with plutonium. Plutonium is a byproduct of the nuclear power generation process. At the number 3 reactor of the Fukushima plant, plutonium is an ingredient in mixed oxide, or MOX, fuel. Radioactivity from plutonium can be shielded by a sheet of paper. But it can remain in lungs and other organs to cause long-term damages including cancer. The Nuclear and Industrial Safety Agency says the detected level is the same as that found in the environment and not health-threatening for workers who conducted the sampling, nor residents in surrounding areas. The agency said it is awaiting the results of another survey by the Science Ministry outside of a 20-kilometer radius from the plant, as well as a further survey by TEPCO in the plant compound. Tuesday, March 29, 2011 02:20 +0900 (JST)

Author’s Note : Seems there are plenty more readings/levels to come.

The “Tokyo Big-One” or not?
This is the other discussion going on in some sectors locally.

The general consensus at this point in time is “probably not” as this quake was centered much further North, but I would like to hear some professional seismologists’ opinions as well as there are plenty of other fault lines in and around Tokyo on which another one could occur.

The red arrows below indicate where all the activity has been on this occasion.

Aftershocks and Seismic Data
Seems this time I will be able to say that despite the fact the number of aftershocks is not in any real decline, the average severity does seem to have fallen somewhat. Caution is still required however as evidenced by two 6.5 magnitude quakes that caused additional tsunami warnings on Monday morning.

Total number of aftershocks that I could obtain data on from the Japanese Meteorological Agency website is now 643, with other sources claiming as high as 850 and 1100+. The difference in numbers can all be attributed to how many of the smaller shocks are recorded by some or not at all by others.

Business Perspective
  • North-East Area – Economic Impact
    Share of Japan GDP which the worst hit areas account for is being estimated to be around 6.0%, not all of which will be lost due to the quake and tsunami’s, however situation in regard to b) below is worsening.
  • Factory Closings
    Number of closings due to inability to secure key production parts/components is increasing. This is leading many to consider relocating production elsewhere for the time being at least. This is due to the Just-in-time inventory system which keeps inventories of production components at low levels and will affect Japan’s GDP for the March and June quarters at least.
  • Economic Recession Likelihood
    For the current QTR, this is considered almost a certainty but only at marginally negative growth levels, for the next QTR it is also considered quite likely with the magnitude dependent on how quickly the problems associated with the JIT system in b) above can be remedied. Subsequently the growth positive effects of rebuilding should gradually become more evident and serve as a base for subsequent rebounds in GDP.
  • Financial Markets
    Article from Bloomberg this week detailing Central Bank Governor’s reluctance to purchase Gov’t Bonds due to his concern about the effect it would have on the JPY and inflation, i.e. he is acting in stark contrast to his US counterparts:
    Bank of Japan Governor Masaaki Shirakawa is under fire for refusing to consider 1930s-style purchases of government bonds to fund reconstruction from the nation’s record earthquake. Shirakawa repeatedly attempted to quash direct buying of government debt, a step allowed in extraordinary circumstances with the permission of the Diet, in appearances before lawmakers this week. The policy would undermine confidence in the yen and provoke a surge in consumer prices, he said at parliamentary fiscal and finance committee hearings.
Stay or Flee? – The “Flygin” Discussion
Big discussion going on in the business community about the number of foreign expats who simply dropped everything and fled the country. Discussion has focused on what their responsibilities are to their colleagues or employees and whether or not they should be fleeing just when Japan and the Japanese are going through one of it’s darkest hours.

Full range of opinions being expressed on this topic, refer the following 4 examples:
    "If I had left as the president, my role as a leader would have been diminished," said Gerry Dorizas, the president of Volkswagen AG's operations in Japan, who has been in that role four years. "We've been very transparent." VW Japan has moved all staff, including 12 expats and 130 Japanese staff and their families, to Toyohashi in Aichi prefecture. One foreign investment banker in Tokyo says he wasn't surprised that so many employees left. "We don't hire people into the financial industry to risk their lives - this is investment banking and we hire investment-banker types," he said. "We are trying to avoid ostracism for those who come back - there is no upside in that - but there is good-natured hazing." To be sure, most foreign senior-level managers leading teams in Tokyo stayed in the capital or relocated their entire offices to other locations in Japan, according to several managers interviewed Tuesday.