Update on the Annandale earthquake
A quick update here on yesterday's "final exam" earthquake:
The USGS has upgraded the magnitude to 2.0, which seems more in line with what my students and I felt. They have also indicated the depth of the hypocenter as being about 6 km.
Talking to other faculty over the course of the day yesterday, I learned it was felt strongly across campus. Hardly surprising, considering we were essentially on top of it. My colleague Nancy Chamberlain wrote me an e-mail describing her experience: "It was a bang, a shake and a rattle. I flew out of my office exclaiming an earthquake... I was told someone dropped something upstairs but it really was an earthquake! I grew up in California and 10 miles off the New Madrid fault in St. Louis... I know an earthquake when I feel one!"
The Survey has also posted a few additional maps. For instance, to establish context, consider this map of historical seismicity in our area:
The USGS has upgraded the magnitude to 2.0, which seems more in line with what my students and I felt. They have also indicated the depth of the hypocenter as being about 6 km.
Talking to other faculty over the course of the day yesterday, I learned it was felt strongly across campus. Hardly surprising, considering we were essentially on top of it. My colleague Nancy Chamberlain wrote me an e-mail describing her experience: "It was a bang, a shake and a rattle. I flew out of my office exclaiming an earthquake... I was told someone dropped something upstairs but it really was an earthquake! I grew up in California and 10 miles off the New Madrid fault in St. Louis... I know an earthquake when I feel one!"
The Survey has also posted a few additional maps. For instance, to establish context, consider this map of historical seismicity in our area:
Labels: earthquakes, nova
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