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An Elusive Blind-Thrust Fault Beneath Metropolitan Los Angeles

Science  05 Mar 1999:
Vol. 283, Issue 5407, pp. 1516-1518
DOI: 10.1126/science.283.5407.1516

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Abstract

Seismic reflection profiles, petroleum wells, and relocated earthquakes reveal the presence of an active blind-thrust fault beneath metropolitan Los Angeles. A segment of this fault likely caused the 1987 Whittier Narrows (magnitude 6.0) earthquake. Mapped sizes of other fault segments suggest that the system is capable of much larger (magnitude 6.5 to 7) and more destructive earthquakes.

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