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Bay Area expert explains why ShakeAlert overestimated the 4.2 magnitude Isleton earthquake


Thursday October 19, 2023 12:29 a.m.

Bay Area experts explain how ShakeAlert works in California

SAN FRANCISCO (KGO) — Did you feel it? Magnitude 4.2 earthquake hits Sacramento Delta Wednesday morning

The epicenter was near Isleton, about 20 miles northeast of Antioch.

Many people in the Bay Area felt the tremors, mainly in the East Bay.

RELATED: Magnitude 4.2 earthquake hits Sacramento County, USGS says

But the bigger question is: did you receive the alert?

Many Bay Area residents received a loud notification when this happened. Additionally, the alert indicated that the earthquake was 5.7. For what?

Dr. Angie Lux, of the Berkeley Seismology Lab’s Earthquake Early Warning Project, joined ABC7’s “Getting Answers” to talk about the warning system and how it works Wednesday.

We asked Lux ​​about “ShakeAlert” and “My Shake App” and the Berkeley Seismology Lab’s relationship with the system, as well as how it is decided who receives these alerts.

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