"Mysterious" Tremors Detected on Central San Andreas Fault

Scientists have detected a spike in underground rumblings on a section of California's San Andreas Fault.

What these mysterious vibrations say about future earthquakes is far from certain. But some think the deep tremors suggest underground stress may be building up faster than expected and may indicate an increased risk of a major temblor. READ MORE

The persistent changes in tremor suggest that stress is now accumulating more rapidly beneath the part of the San Andreas Fault which ruptured in the 7.8M Ft. Tejon earthquake of 1857. SCIENCE Magazine Article Abstract