Tuesday, January 15, 2008

Frequency of Ohio Earthquakes Seems on the Rise

From Associated Press:
It was just a relatively small shake, an earthquake beneath Lake Erie that was a mild 3.1 magnitude that could be felt in some lakeshore communities.

Still, Ohio seems increasingly prone to the shakes; there have been 25 earthquakes of magnitude 2.0 or higher over the past two years, equal to the number the five years before that. There have been about as many such quakes in Ohio so far this decade as in the previous 30 years

"We think Ohio, especially northeast Ohio and Lake Erie, is going through a period of increased seismic activity,'' said Mike Hansen, coordinator of the Ohio Seismic Network.

One explanation could be that there is better monitoring equipment than in the past. But more frequent activity is a likelihood.

Ohio State University geophysics professor Ralph Von Frese said location is the key.

"We're the earthquake capital of the Big Ten, at least,'' he said. "This is earthquake country, and Ohio is situated so that we've experienced more than every state around us.''

So just what is it that seems to make Ohio so ... shaky?
"That's the question everyone is interested in _ and the one we can't answer for certain,'' Hansen said.

There are, however, several theories about frequent earthquakes, including the one with the 3.1 magnitude that hit Tuesday.

My Comments:
The town of Columbia, Virginia, of which I was the mayor for 7 years, is well-known for floods and earthquakes. Since we moved to Ohio 2 years ago, there have been 2 major floods in this area and now an earthquake.




At 1/16/2008 12:23 AM, Anonymous BillyHW said...

The evil forces of climate change strike again!

At 1/16/2008 1:37 PM, Anonymous Jim said...

I built a fiber optic earth quake sensor which was put on the pier at John Carroll Univercity in the late '80s when I was a graduate student there. They already had a complement of seismographs there.

I do wonder if it is still in operation and whether it contributes to the measurements.


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