ground noise after Ml 2.5 - Healdsburg
Posted by Lowell on July 29, 2001 at 20:39:37:

There is some strange looking ground noise which is continuing at this time following
the Ml 2.5 in Healdsburg tonight. You might want to look at it and see what you
think - is this water motion in the Geysers area?
http://quake.usgs.gov/cgi-bin/helicorder.pl?3&GGP&latest