[ghsc-seminars] GHSC Seminar Tomorrow @ 10am: Sue Hough, USGS Pasadena

[Mirus, Benjamin]

*"**Evidence for Production-Induced Earthquakes...in California?*
*"*​​
*Sue Hough, Research Geophysicist *
*USGS Pasadena*

While recent investigations of induced earthquakes have focused on
earthquakes induced by wastewater injection and/or hydraulic fracturing, it
is well established that primary production can also in some cases induce
earthquakes.  Past studies have further identified static stress change
associated with uncompensated fluid extraction as a plausible mechanism to
account for production-induced earthquakes.  In this talk I review evidence
that oil production during early oil booms in California might have induced
a number of significant earthquakes in the early-to-mid-20th century,
including a number of moderate earthquakes in the Los Angeles basin between
1938 and 1944.  Calculating stress and strain changes associated with oil
production from the Wilmington oil field and adjacent field during the late
1930s and early 1940s, one finds that, as production horizons reached 3-4
km depth, stress perturbations upwards of 0.1 MPa were generated at
seismogenic depths in the southwest Los Angeles basin.


*Thursday, March 22nd, 2018*
*10-11am​  (Mountain Time)*
*USGS, 1711 Illinois Street, Golden, CO*
*Entry Level Seminar Room*

*Note: Please arrive *~5 minutes early* and *bring photo ID* for
airport-style security measures now in place at the USGS building.

Thank you,
GHSC Seminar Committee

Mirus, Ben - bbmirus at usgs.gov
Josh Rigler - erigler at usgs.gov
Oliver Boyd - oboyd at usgs.gov

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