By Craig Miller, KQED Science/KQED News Fix
It took less than 20 seconds to shake apart historic buildings and topple chimneys from Vallejo to St. Helena.
But throughout the Napa Valley, the August 24 South Napa Earthquake left its calling cards — not just the startling damage in downtown Napa but also subtle traces on the ground itself: clues to what actually happened deep below the surface. In fact, geologists now say that the South Napa quake created more surface fractures than any known quake of its size in California.
Weeks after the magnitude-6.0 shaker, a new picture is emerging of the complex geology underneath. The quake is literally redrawing the fault maps and providing valuable clues to the next major seismic event.
Read the complete story at KQED Science/KQED News Fix.
