Take a look at USGS Professional Paper 435 - "The Hebgen Lake, Montana, earthquake of August 17, 1959" at <a href=http://pubs.er.usgs.gov/usgspubs/pp/pp435>http://pubs.er.usgs.gov/usgspubs/pp/pp435</a>.  Section Q discusses effects on "the hot springs of the Firehole Geyser Basins".    I didn't read through it, but it sounds like what you are looking for,  Table 23 has a summary of characteristics of geysers affected by the quake. Hope that helps, Steve Shivers <table width=100%> <tr valign=top> <td width=40%><Beckykr@aol.com> Sent by: <geysers-bounces@lists.wallawalla.edu> 08/04/2008 03:18 PM <table border> <tr valign=top> <td bgcolor=white> <div align=center>Please respond to Geyser Observation Reports <geysers@lists.wallawalla.edu></div></table> <td width=59%> <table width=100%> <tr valign=top> <td> <div align=right>To</div> <td><geysers@lists.wallawalla.edu> <tr valign=top> <td> <div align=right>cc</div> <td> <tr valign=top> <td> <div align=right>Subject</div> <td>[Geysers] 1959 Earthquake</table> <table> <tr valign=top> <td> <td></table> </table> Hi Everyone,   Is there a list of thermal area changes that occurred in response to the 1959 earthquake?  I am interested in short term and long term changes to geysers, etc.  If anyone knows of a list of the things that occurred post-Earthquake in a book or online, I would appreciate it.  If no such list exists, would going through "The Geysers of Yellowstone" be the best way to compile such a list?     Thanks,   Becky Kraegel Woodstock, GA     <hr>Looking for a car that's sporty, fun and fits in your budget? <a href="http://autos.aol.com/cars-BMW-128-2008/expert-review?ncid=aolaut00050000000017" target=_blank>Read reviews on AOL Autos</a>.<tt>_______________________________________________ Geysers mailing list Geysers@lists.wallawalla.edu https://lists.wallawalla.edu/mailman/listinfo/geysers</tt>