Category Archives: Uncategorized

Intense rain in disaster area

The tropical cyclone season kicks off this month in the region – see prior post.  The remnants of an early arrival, Typhoon Songda, impacted Japan Monday as a downgraded tropical storm.  The damage sustained locally included, power outages, flooding and landslides. … Continue reading

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Why are evacuation zones circles?

Today’s expansion of the evacuation zone by the Japanese government to include certain hotspot areas is the latest wrinkle in the evolving quest to keep the public safe from radiation.  What is the basis for the shape of these evacuation … Continue reading

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Plume forecast for Japan: 4/5

Plume could reach Choshi and coastal regions to the south on the afternoon of April 4 and particularly the evening of April 5 Japan Standard Time (JST).  Any material emitted during this time could impact those regions.  This area could … Continue reading

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Plume forecast for Japan: 3/15

Predicted winds over the next 12 hours (through evening of 15 March, Japan Standard Time).  Wind speed is in knots.  Wind vectors (arrows) show southwestward and onshore flow, impacting Tokyo and surroundings. Transport patterns place these areas in the path … Continue reading

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Airborne plume dispersion in coastal areas

New York City, like most megacities including Tokyo, does not have mechanisms in place to evacuate the population of the entire city.  Even the direst catastrophic scenarios entail a strategy of sheltering in place for at least some of the … Continue reading

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