Strontium 90 spread over 1000km evenly in Pacific ocean

From 1/12/2012 to 1/15/2012, Japan Coast Guard measured cesium134, 137 and strontium 90 in sea water.


As a result,

1. Strontium 90 exists about 17 ~ 62 % of cesium 134/137, where Ministry of Education, Culture, Sports, Science and Technology assumed it would be 0.1 %.


2. Strontium 90 evenly spreads from 170km offshore of Chiba to 1000km south east to Japan. It spreads from 1m to 100m deep in the sea as well.



↓ Red line shows concentration of strontium90. It is more flat than cesium 134/137 regardless of the distance / location / depth.


Strontium 90 spread over 1000km evenly in Pacific ocean


Strontium 90 spread over 1000km evenly in Pacific ocean2


Strontium 90 spread over 1000km evenly in Pacific ocean3




About this site

This website updates the latest news about the Fukushima nuclear plant and also archives the past news from 2011. Because it's always updated and added live, articles, categories and the tags are not necessarily fitted in the latest format.
I am the writer of this website. About page remains in 2014. This is because my memory about 311 was clearer than now, 2023, and I think it can have a historical value. Now I'm living in Romania with 3 cats as an independent data scientist.
Actually, nothing has progressed in the plant since 2011. We still don't even know what is going on inside. They must keep cooling the crippled reactors by water, but additionally groundwater keeps flowing into the reactor buildings from the broken parts. This is why highly contaminated water is always produced more than it can circulate. Tepco is planning to officially discharge this water to the Pacific but Tritium is still remaining in it. They dilute this with seawater so that it is legally safe, but scientifically the same amount of radioactive tritium is contained. They say it is safe to discharge, but none of them have drunk it.


May 2012