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Old 21-August-2007, 12:19 AM
Ray Murphy Ray Murphy is offline
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Quote:
Originally Posted by Chris K View Post
Some interesting findings there, Robert.

I would be concerned about the data since early 20th century data might be more selective and perhaps more dependent on earthquakes occurring near population centres.
I've got about 4,000 earthquakes here and I've just noticed that before 1900 the magnitudes were only approximate. This dataset also has most of them for the period 1967 to 2003.