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A comment on 7.1 magnitude earthquake hits Japan.

Re:7.1 magnitude earthquake hits Japan by harshpotatoes on Thursday April 07, 2011 @03:44PM (#2420944)
So, this brings the number of >6.5 mag earthquakes off the cost of japan in the past month up to like 12 I believe?*

Surely there is a geologist in the midst who can explain whether this is normal/expected?

*http://neic.usgs.gov/neis/qed/

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Re:7.1 magnitude earthquake hits Japan by pchristensen on Thursday April 07, 2011 @04:16PM (#2421028)
IANAG but IIRC quakes often happen in bunches like this as the earth's crust settles into a semi-stable state.
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Re:7.1 magnitude earthquake hits Japan by harshpotatoes on Thursday April 07, 2011 @06:51PM (#2421549)
Yeah. I guess. And doing some more looking on the internet and possibly answering my own question, maybe: http://en.wikipedia.org/wiki/Earthquake_swarm

It's hard to find useful information on line about this. But I guess that the lack of information in itself probably means that geologists aren't particularly worried about it.

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