Response of streamflow to multiple earthquakes

Journal Article · Sat Jun 01 00:00:00 EDT 2002 · Geophysical Research Letters

OSTI ID:837929

Manga, Michael ^[1]; Brodsky, Emily E; Boone, Michael

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1. LBNL Library

We analyze the streamflow response of Sespe Creek, CA, to several large earthquakes. We find that flow increased after three earthquakes, and that the observed changes in flow have the same character. Both those earthquakes that induced static extension and those that induced static contraction cause flow to increase; streamflow thus appears to respond to dynamic strain. We find that all postseismic responses can be explained by a model in which pore pressure increases coseismically without any changes in hydraulic diffusivity. There is a particle velocity threshold in the range of 5-20 cm/s to induce the pore pressure increase. [References: 16]

• Research Organization: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
• Sponsoring Organization: USDOE Director, Office of Science (US)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 837929
• Report Number(s): LBNL--54784
• Journal Information: Geophysical Research Letters, Journal Name: Geophysical Research Letters Journal Issue: 5 Vol. 30; ISSN GPRLAJ; ISSN 0094-8276
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
CONTRACTION
EARTHQUAKES
HYDRAULICS
PORE PRESSURE
STREAMFLOW EARTHQUAKES CONSOLIDATION PORE PRESSURE LIQUEFACTION CALIFORNIA
VELOCITY