Monday, November 5, 2007

Antarctica Earthquake : M 5.8 "Casey"

Updated post.

There has been a large earthquake on the Antarctic continent. The USGS report gives the following updated details:

Magnitude 5.6
Sunday, November 04, 2007 at 20:35:36 UTC
Location 67.097°S, 111.316°E
Depth 10 km
Distances 95 km SSE of Casey Station, Antarctica

Earthquakes on the Antarctic continent itself are extremely rare. This one is likely to be closely scrutinized by all Antarctic seismologists. Here is a Google Earth picture of the know seismicity in the region around the CASY seismic station at Casey (thanks to JJL for the script used to make this image). The image includes the latest event (left-most on the map).

Here are a couple of pictures of seismograms from CASY station. The first shows the three components of motion (vertical, north, east) for the M5.6 event. The strongest signals are saturated. The second picture shows vertical component recordings of a set of aftershocks of the main event. Although we do not have exact locations of these aftershocks, they occurred at approximately the same distance from CASY as the main event.

Keep up to date with the latest developments at

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