Bay Area Jolted By 4.4 Earthquake On Hayward Fault

Posted January 07, 2018

Update | An natural disaster struck the Bay Area early Thursday morning along a fault line that U.S. Geological Survey scientists have called a "tectonic time bomb".

The USGS placed the epicenter of the quake next to the Claremont Club and Spa in Berkeley.

But there's also a chance that this was a foreshock, a precursor to a larger quake. The damage is expected to be minimal, but it occurred along the Hayward fault-one of the seven fault zones in the Bay Area, according to the USGS. "Through geologic excavations across the Hayward fault we've learned that there are earthquakes on at least the southern part of the Hayward fault every 140, 150, 160 years", said Keith Knudsen, U.S. Geological Survey.

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"Woke up screaming, which scared my husband more than the quake", one wrote on SFGate's Facebook page. Though the last big quake on the fault was a magnitude 7 in 1868, they are concerned about the recurrence rate which gauges how often you would expect a big natural disaster to happen on a given fault. In fact the 150th anniversary is coming up - we think that quake was a magnitude 6.8 or so.

Transit agencies reported there were delays during the early morning commute while they checked for any damage.

However, at about 4:45 a.m., BART reported on its Twitter account that there were "no initial reports of damage on our system". An estimated 9 million people have felt the rumblings of the quake that hit around 2.39 AM in the early morning. The event was felt as far east as Sacramento and beyond San Jose, to the south of Berkeley.

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"I felt it in San Rafael", she posted.

In the South Bay, Chris Defayette said it was "a quick jolt".

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