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Chile Tsunami Should be Approaching Taiwan Now

Submitted by john on Wed, 04/02/2014 - 15:34

From NOAA.  Posted at 15:33 on 4/2/2014

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Chile Earthquake filled an Old Gap

Submitted by john on Wed, 04/02/2014 - 09:18

This slide is from a compilation by the IRIS consortium

 

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Chile Earthquake Seismic Gap

Submitted by john on Tue, 04/01/2014 - 20:04

One of the theories about earthquake occurrence over the years is that seismic gaps develop between major and great earthquakes, and are eventually filled.  With that in mind, it is interesting to plot the approximate slip planes for both the M8.8 earthquake of 27 February, 2010, and today's M8.2 earthquake of April 1, 2014.

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Magnitude M8.2 and Tsunami, Iquique Chile, April 1, 2014

Submitted by john on Tue, 04/01/2014 - 18:15

Earthquake in Chile with tsunami watch and warning.  Areas of the Pacific should take precausions, including Hawaii and Japan, among other areas.  Depth shallow, about 10 km.  Screenshot of earthquake location below, with forecast contours for M>6.5.  The forecast was computed at midnight last night - forecasts are updated every night at midnight California time.

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Is Earthquake Insurance Worth It?

Submitted by john on Mon, 03/31/2014 - 12:34

We often get asked this question.  Here is one opinion after the recent March 28, 2014 Brea/La Habra (Los Angeles) California earthquake.

http://video.cnbc.com/gallery/?video=3000262924

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Magnitude 5.1 Earthquake Los Angeles, March 28, 2014

Submitted by john on Sat, 03/29/2014 - 10:23

The earthquake occurred last night at about 9:09:42 pm PDT. Below are some screenshots and simple analysis of future earthquake risk taken from the Hazard Viewer.

The epicenter was closest to the Puente Hills mapped fault:

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M4.4 Earthquake near Los Angeles, CA March 17, 2014

Submitted by john on Mon, 03/17/2014 - 08:21

(Updated 10:45 PDT 3/17/2014)

A moderate earthquake occurred this morning at 0625 am PDT.  It was centered at a location 9 km NNW of Westwood, CA, where the University of California at Los Angeles is located.  A screenshot from the Open Hazards Hazard Viewer is shown below:

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M6.9 Earthquake Offshore Eureka, California, March 10, 2014

Submitted by john on Mon, 03/10/2014 - 08:29

The earthquake occurred at 0700 PDT, 7 hours after the forecast for the figure below was computed (it is computed at midnight).  Using the hazard viewer, we can draw a circle of 100 km radius around the epicenter.  The forecast table (lower left corner) indicates that there was a 25% chance of an M>6 earthquake within the next year, and a 91.6% chance within the next 3 years. 

(Update on March 11:  The magnitude has been further refined to 6.8 rather than 6.9)

 

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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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