[Chesterbelloc]

Just to put what looks like a lot of earthquake activity in perspective; over the last decade there has been an earthquake between 6.0 and 6.9 magnitude somewhere in the world every 2.5 days on average.

http://earthquake.usgs.gov/earthquakes/eqarchives/year/eqstats.php

[John W]

OK. How often has there been a 7.0 followed in 10 hours by an 8.8?

[bd476]

That is true. Thanks Chesterbelloc.

[jimpick]

Maybe we should throw a dumbacrate in a volcano every 2.5 days then.

[Cvengr]

But then again, a century ago, those major earthquakes didn’t happen once about once every 30 days on average.