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After big quake, Napa fault could move 6 inches in 3 years
After big quake, Napa fault could move 6 inches in 3 years

Think the Napa fault stopped moving after producing a 6.0 earthquake in August? Think again. The fault that caused that Napa quake is forecast to move an additional 2 to 6 inches in the next three years in a hard-hit residential area, a top federal scientist said at a meeting of the American Geophysical Union in San Francisco on Tuesday. It is the first time scientists have formally forecast the gradual shifting of the ground in a residential area after an earthquake. “Until the South Napa earthquake happened, we had not clearly foreseen just what a problem that could be,” U.S. Geological Survey geophysicist Ken Hudnut said. If the worst-case forecast comes true, that...

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