Written by David Phillips & Beth Bartel
19 December 2016
From the USGS FAQ "Why are there so many earthquakes in the Geysers area in Northern California?":
The Geysers Geothermal Field is located in a tectonically active region of Northern California. The major seismic hazards in the region are from large earthquakes occurring along regional faults that are located miles away from the geothermal field, such as the San Andreas and Healdsburg-Rodgers Creek faults. However, activities associated with the withdrawal of steam for producing electric power cause or induce small quakes to occur in the field. These smaller quakes are frequently felt by those who work at the field and by nearby residents.
For more information on this event, see the USGS Earthquake Hazards Program event page.
In response to the M5.0 earthquake 8km NW of The Geysers, California on 2016-12-14 at 16:41:05 UTC, UNAVCO is downloading high-rate GPS/GNSS data from EarthScope Plate Boundary Observatory stations within 150 km of the epicenter. Five-sample-per-second (5-sps or 5 Hz) data will be collected for one hour each day (16:00-17:00 UTC) for 15 days (day of event ± 7 days). (Note: This is a custom data acquisition based on site communication constraints and PI request.) These data will be available from the UNAVCO ftp site.
Borehole Strainmeter Data
UNAVCO has produced a fully processed 1-sps borehole strainmeter (BSM) dataset spanning the time period of this event, available from the PBO borehole strainmeter event response page.
Last modified: 2020-02-06 00:23:17 America/Denver