Author Topic: Scientists think a 7.4 temblor could reach from L.A. to San Diego  (Read 33 times)


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Rong-Gong Lin II

The discovery of missing links between earthquake faults shows how a magnitude 7.4 temblor could rupture virtually simultaneously underneath Los Angeles, Orange and San Diego counties, a new study finds.

Such an earthquake would be 30 times more powerful than the magnitude 6.4 Long Beach quake in 1933, which killed 120 people.

But to get to a 7.4, the earthquake would not only have to again rupture the Newport-Inglewood fault in Los Angeles and Orange counties. It would also have to jolt the adjacent Rose Canyon fault system, which runs all the way through downtown San Diego and hasn’t ruptured since roughly 1650.

“These two fault zones are actually one continuous fault zone,” said Valerie Sahakian, the study’s lead author, who wrote it while working on her doctorate at Scripps Institution of Oceanography at UC San Diego. Sahakian is now a research geophysicist with the U.S. Geological Survey.

Not good news for the people living in that area.