NORTHERN CALIFORNIA – The Hayward Fault gave the Bay Area two strong earthquakes on Thursday afternoon.

The US Geological Survey reported that the quakes – both of which were centered in Berkeley along the Hayward Fault – measured 4.0 and 3.8 in magnitude, and occurred at 2:41 p.m. and 8:16 p.m., respectively.

The 4.0-magnitude quake was measured at a depth of 5.1 miles two miles southeast of Berkeley and two miles northeast of Emeryville, the US Geological Survey reported.

By early Friday morning the US Geological Survey had received more than 18,000 shake reports across about 280 zip codes on that initial quake.

The second quake occurred six miles deep one mile east of Berkeley and three miles east southeast of Albany, according to the US Geological Survey, which received nearly 15,000 shake reports from more than 280 zip codes by early Friday morning.

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