PubTalk 8/2006 — Hidden Faults Under Silicon Valley

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Detailed Description

Do new discoveries change our view of Santa Clara Valley earthquake hazards?

by R. D. Catchings, Geophysicist 

  • Seismic profiles have revealed the valley.s deep structure and previously unknown faults
  • Earthquakes and seismic reflection images suggest some reverse faults beneath the valley that are not seen at the surface
  • The disastrous 1994 Northridge earthquake occurred on a hidden fault like those now known to underlie Silicon Valley
  • Deep sedimentary basins on both sides of the valley can greatly amplify earthquake shaking

Details

Image Dimensions: 200 x 136

Date Taken:

Length: 01:12:11

Location Taken: Menlo Park, CA, US

Transcript

Contact wmcesic@usgs.gov for transcript.