This lack of damage near the epicenter puzzled scientists ... which could help better map the area’s fault systems. Other ...
The epicenter for all the quakes was about one mile east of Hayward, in San Francisco’s East Bay, according to the U.S.
The US Geological Survey (USGS)detected the massive tremor at 1:15pm local time, with its epicenter ... Blanco Fracture Zone (BFZ), deemed more active than California's San Andreas Fault.