By contrast, an earthquake on the Puente Hills thrust fault system probably would max out at a magnitude 7.5 — still powerful, but less so than the southern San Andreas. The effects, however ...

New research uncovers a surprising clue in earthquake forecasting: tiny curved scratches on fault planes. These marks reveal ...

As seismologists review available data, they often revise the earthquake's reported magnitude and update shake-severity maps ... both occurred along the San Andreas fault, said Robert Skoumal ...

This sudden jerk creates an earthquake. The San Andreas Fault is undoubtedly the most famous transform boundary in the world. To the west of the fault is the Pacific plate, which is moving northwest.

The biggest danger zones of the seismic variety are the Cascadia Subduction Zone in the Pacific Northwest, the San Andreas Fault in California ... 20-30 years. This map shows locations of ...

That two inches -- the average distance the San Andreas fault moves each year -- has the ... argues that they should be treated as a single system with potential for earthquake ruptures generating ...