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And Again [Mar. 11th, 2010|09:48 am]
Wizard of Changes -- ©cdozo 2004 to 2015
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Now there's been a 6.9 aftershock.

6.9 aftershock to the 7

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Comments:
[User Picture]From: ndozo
2010-03-11 08:04 pm (UTC)
It's not a new earthquake?
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[User Picture]From: cdozo
2010-03-11 08:43 pm (UTC)

You Figure It Out

Here's what the USGS has to say about it (from http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/us2010tsa6.html#summary):

Tectonic Summary

The Chile earthquakes of March 11, 2010, 14:39 UTC and 14:55 UTC, occurred in the region of the plate boundary between the Nazca and South America plates, in the aftershock region of the great Chile earthquake of February 27, 2010. The March 11 earthquakes almost certainly occurred as the result of the change of regional stress caused by the February 27 earthquake. Preliminary analyses of their locations and seismic-wave radiation patterns, however, imply that the March 11 shocks occurred as the result of normal faulting within the subducting Nazca plate or the overriding South America plate, unlike the February 27 earthquake, which occurred as thrust faulting on the interface between the two plates. At present, the focal depths of the shocks are not known with sufficient precision to confidently determine within which of the Nazca or South America plate the earthquakes occurred.
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