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Today's M7.4 Aftershock

Submitted by john on Thu, 04/07/2011 - 08:12

This latest M7.4 quake(s) was centered 68 miles E of Sendai.  Apparently there may have been 2 of these M7.4 events 42 sec apart (according to the USGS data), although this may be revised to 1 such event (the event may have been double-listed).  A tsunami warning was just issued.

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Earthquake Data

Submitted by john on Sun, 04/03/2011 - 19:34

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Aftershocks

Submitted by john on Mon, 03/28/2011 - 20:12

According to Bath's law, a magnitude 9.0 earthquake shouild be followed by an aftershock of about 8.0  For the first week following the mainshock, there was no evidence of such an event.  However, the magnitude 6.8 aftershock that occurred about ahalf hour after the mainshock has now been upgraded to a 7.9 magnitude quake.  This event occurred about 100 km (60 miles) northwest of Tokyo. 

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Tohoku-Oki Tsunami in Hawaii: A Report from the Field

Submitted by john on Sat, 03/19/2011 - 16:21

A neighbor of mine returned this week from a vacation in Maui, Hawaii.  She sent me this description:

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Fukushima Radiation Plume: A Report from the Field

Submitted by john on Fri, 03/18/2011 - 07:48

A colleague of mine flew from Los Angeles to Taipei, Taiwan yesterday to attend a scientific meeting.  Normally the flight path used by United airlines takes the aircraft down the eastern coast of Honshu, Japan, on its way to Taipei, or if it stops in Tokyo, to Narita.  On this trip the pilot gave an especially wide berth as the aircraft came abreast of Fukushima, passing within about 200 miles of the island. 

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Breaking News: Section Of Hwy 1 Falls Into Ocean

Submitted by jrholliday on Thu, 03/17/2011 - 22:05

From KSBW, a 0 foot section of Highway 1 near Big Sur fell into the ocean:

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Japanese Data Site for Tohoku-Oki Earthquake (in English)

Submitted by john on Thu, 03/17/2011 - 13:40

This is a site used by a variety of Japanese researchers, and is meant to be a service to the international community. As the site says: "Here are some links and information to the recent earthquake.  Most information is in English and some Japanese websites with figures that can probably be understood"

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Research Data Site for the Tohoku-Oki Earthquake

Submitted by john on Thu, 03/17/2011 - 13:33

This is a site maintained by researchers in the US and international communities that may also have material of interest to the casual visitors.  A number of these observations are from satellite observations.

http://supersites.earthobservations.org/honshu.php

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About OpenHazards Bloggers

Steven Ward is a Research Geophysicist at the Institute of Geophysics and Planetary Physics, UC Santa Cruz. He specializes in the quantification and simulation of natural hazards. Read Steve's blog.

John Rundle is a Distinguished Professor of Physics and Geology at UC Davis and the Executive Director of the APEC Collaboration for Earthquake Simulations. He chaired the Board of Advisors for the Southern California Earthquake Center from 1994 to 1996. Read John's blog.

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