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Application of ground-penetrating radar to investigation of near-surface fault properties in the San Francisco Bay region

Bulletin of the Seismological Society of America

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Abstract

In many geologic environments, ground-penetrating radar (GPR) provides high-resolution images of near-surface Earth structure. GPR data collection is nondestructive and very economical. The scale of features detected by GPR lies between those imaged by high-resolution seismic reflection surveys and those exposed in trenches and is therefore potentially complementary to traditional techniques for fault location and mapping. Sixty-two GPR profiles were collected at 12 sites in the San Francisco Bay region. Results show that GPR data correlate with large-scale features in existing trench observations, can be used to locate faults where they are buried or where their positions are not well known, and can identify previously unknown fault segments. The best data acquired were on a profile across the San Andreas fault, traversing Pleistocene terrace deposits south of Olema in Marin County; this profile shows a complicated multi-branched fault system from the ground surface down to about 40 m, the maximum depth for which data were recorded.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Application of ground-penetrating radar to investigation of near-surface fault properties in the San Francisco Bay region
Series title:
Bulletin of the Seismological Society of America
Volume
86
Issue:
5
Year Published:
1996
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Bulletin of the Seismological Society of America
First page:
1459
Last page:
1470
Number of Pages:
12