Thursday, September 07, 2006

Earthquake Weather

We had an earthquake here a few minutes ago. Apparently I slept through a 4.9 M at 3 a.m. too. This was a 4.4. That's pretty minor, but it was close, so we had the fine up and down shaking of the p-wave, very crisp and sharply defined, followed closely by the s-wave with its more funky low-key dance vibe. NHK tv reported it as centered in Kanagawa before deciding a few minutes later that it was centered in Chiba. Somehow Kanagawa and Ibaraki shook as much or more than the epicenter. The Meteorological Agency seemed to have the fastest reports, so check there or NHK for best results. http://www.jma.go.jp/en/quake/ You may wonder why tectonic movements are part of the weather service, but there actually is some relationship, such as quakes occuring during winter high pressure, and the phenomenon of earthquake clouds. I checked the USGS for weather reports but there seems to be a clearer division of labor in the US; the USGS is not allowed to forecast or report the weather.

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