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Strategies & Market Trends : The Residential Real Estate Post-Crash Index-Moderated -- Ignore unavailable to you. Want to Upgrade?

To: posthumousone who wrote (12372)3/17/2011 8:16:48 AM
From: Giordano Bruno  Respond to of 119360
 
Looks like they increased in 2002.

earthquake.usgs.gov



To: posthumousone who wrote (12372)3/17/2011 12:53:40 PM
From: Dan3  Respond to of 119360
 
Re: i wonder if we always had this many quakes,

There have been small increases in global temperatures (despite what this winter has been like!). Surface temperature increases cause thermal expansion. Thermal expansion increases (slightly) pressure on tectonic plate boundaries. Maybe that's increasing the number of quakes.

We only have seismographic records for about the last hundred or so years, so it's hard to say what's "normal."
earthquake.usgs.gov


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