Powerful earthquake strikes eastern Turkey

by Joe on Oct. 23rd, 2011

Map of Turkey: The city of Van, on the far right of this map near a large lake, was the closest to the earthquake.
Map of Turkey: The city of Van, on the far right of this map near a large lake, was the closest to the earthquake.Courtesy USGS
A 7.2 magnitude earthquake struck eastern Turkey near the city of Van at 5:42am today, the most powerful earthquake in Turkey for at least a decade.

The US Geological Survey (USGS) originally gave the magnitude as 7.3 but later corrected it to 7.2 with a depth of 12.4 miles.

The Turkey's Kandilli observatory told a news conference it estimated 500-1,000 people could have been killed as a result of the earthquake.

Within an hour of the initial 7.2 earthquake, two aftershocks of magnitude 5.6 struck the same region.

Your Comments, Thoughts, Questions, Ideas

Michael's picture
Michael says:

Boğaziçi University in Turkey provided a press bulletin today with maps, updates on casualties/damage, and information on historical seismicity in the area.

From the fault plane solutions shown in the bulletin, the quake was caused by movement along a reverse fault. The black quadrants of the "beachball"-like diagrams indicate where the P-wave (compressional) first-motions are away from the source. Arild Andresen from the University of Oslo provides a good tutorial on how to interpret fault plane solutions.

posted on Mon, 10/24/2011 - 11:33am

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