2014 Napa earthquake continued to creep, weeks after main shock
Saturday, August 20, 2016 - 05:01
in Earth & Climate
On August 24, 2014, just south of Napa, California, a fault in Earth suddenly slipped, violently shifting and splitting huge blocks of solid rock, 6 miles below the surface. The underground upheaval generated severe shaking at the surface, lasting 10 to 20 seconds. When the shaking subsided, the magnitude 6.0 earthquake left in its wake crumpled building facades, ruptured water mains, and fractured roadways. Scientists now report that this earthquake continued to creep, weeks after the main shock.