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MODERATE QUAKE ROCKS EAST BAY AREA

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A moderate earthquake shook sleepers awake, rattled supermarket shelves and broke windows early Sunday in the east San Francisco Bay area.

No injuries were reported, although the quake was felt as far north as the Napa Valley and as far south as San Jose."It was a really solid quake, a series of jolts," said Mark Towns, a manager at a 24-hour Lucky's supermarket in El Cerrito.

"It just rocked the whole building. We had damage down 60 percent of the aisles," he said. "It looked like the floors buckled."

Staff and customers temporarily evacuated the store.

Storefront windows broke at a Berkeley Safeway, and San Jose police reported the shock rocked the third floor of their earthquake-reinforced headquarters.

The quake, which struck along the Hayward Fault at 1:42 a.m., registered at magnitude 4.2, according to Lu Page, a spokeswoman for the U.S. Geological Survey in Menlo Park. It was centered about three miles north of Berkeley.

The quake was preceded by two smaller foreshocks of magnitude 3.2 and 2.3, Page said.