Tag Archives: onshore

Scrutiny of evacuations continues

This week the Wall Street Journal published a cluster of frontpage stories (here and here, along with video content) about the evacuation mishaps and tragedies in the wake of the Fukushima Daiichi nuclear incident.  In “How Japan Stumbled in Forecasting … Continue reading

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Which reactor event caused the radiation plume toward the northwest?

There has been speculation that the most extreme release of radiation was associated with fires in the fuel pool of reactor 4. The wind and plume maps below support this hypothesis. The aerial radiation mapping conducted March 17-19 by the … Continue reading

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Plume forecast for Japan: 4/13 to 4/14

An offshore plume loop and subsequent excursion inland to the south could transport any airborne material toward land in the early hours of Wednesday April 13 Japan Standard Time (JST).  Northward plume transport in the morning, followed by offshore flow … 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: 4/10

The plume is projected to expand inland and overlap a broad area of the east coast of Japan through the afternoon and evening of Sunday April 10 Japan Standard Time (JST). A WSJ story reports: “The government’s top spokesman, Chief Cabinet … Continue reading

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Plume forecast for Japan: 4/8

Several northward wind shifts draw the plume north of Fukushima and also move earlier plume remnants over the Boso Peninsula in the late evening of Thursday April 7 and morning of Friday April 8 Japan Standard Time (JST). No radioactive … Continue reading

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Plume forecast for Japan: 4/6

The plume is projected to migrate onshore and to the north and northeast throughout the afternoon and evening of Wednesday April 6 Japan Standard Time (JST).  This could affect areas where relief efforts are underway, if radiation releases are continuing. … 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: 4/4

The plume is anticipated to remain over the ocean, moving toward the southeast and then south through the afternoon of Monday April 4 Japan Standard Time (JST). An illustration of the variability in coastal conditions that can lead to high … Continue reading

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Plume forecast for Japan: 4/3

Plume forecast shows local coastal areas south of the release site potentially impacted in the afternoon of April 2 Japan Standard Time (JST). In the evening of April 2 and early hours of April 3, the plume is expected to … Continue reading

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