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Comment Re:so just how many (Score 1) 822

Of course, you need to keep in mind earthquake magnitudes are measured on a log_10 scale. i.e. a 5.0 ~ 10 x 4.0. The Sendai/Tohoku earthquake was a magnitude 9.0 MMS quake. I've slept through a 4.5 when living in Tokyo. A nice map of seismic activity can be found on the website of the usgs []

Comment Units and numbers to keep in mind (Score 1) 1148

Some numbers to keep in mind (where possible, numbers were verified against multiple sources: IAEA, NYT, Ibaraki prefecture radiation monitoring stations south of Fukushima):radiation dose unit conversion: 1 rem = 10000 Sv, 1. Maximum dose/year for US rad worker: 5 rem ... 2. Background radiation dose/year in US: 0.500 rem (Denver, CO: 1 rem) ... 3. Highest measured dose rate anywhere in Ibaraki: 0.00025 rem/hour (Tuesday morning) ... 4. Highest reported dose rate at site boundary: 0.1 rem/hour ... 5. Highest reported dose rate on reactor site: 40 rem/hour for several hours ... 6. Radiation dose rate at Chernobyl on reactor site in days after explosion: 10 to 5000 rem/hour (not considering dose-on-contact of ejected reactor components) ... 7. Average cumulative radiation dose for Chernobyl first responders, resulting in up to 300 acute radiation deaths: 500 000 rem ... Some newspapers keep using mSv and mrem interchangeably, never mind the factor 100 difference.

Backed up the system lately?