VIDEO: South Napa Quake’s Duration Varied Depending on Location

By Brian Shields

Mon Aug 25th, 2014 8:52am America/Los_Angeles

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MENLO PARK (KRON) — How long did the South Napa Earthquake last? Well it depends on where you were, according to a geologist with the U.S. Geological Survey.

“Close in to where the earthquake rupture occurred it was about five seconds of very strong shaking, that initial jolt followed by less high amplitude shaking,” U.S.G.S. Seismologist Brad Aagaard tells KRON 4′s Mark Danon and Darya Folsom on the KRON 4 Morning News. “Then as you get farther away down to say San Francisco, it was about ten to fifteen seconds of shaking that was small in amplitude and close in.”

Aagaard says seismologists are still doing tests and gathering data about the source of the quake which they say happened near the West Napa fault.

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