There's a theory by James Faulds (NV state Geologist) that the San Andreas is locked and the stress caused by the two adjacent plates have found a new weakpoint

There's a theory by James Faulds (NV state Geologist) that the San Andreas is locked and the stress caused by the two adjacent plates have found a new weakpoint. 10-20 years it was widely ridiculed. These days it's gaining mindshare as the evidence from seisometers and GPS are showing compatible data. All along 395 there is increased earthquake activity, obvious signs of thin crust (like hot springs), and aftershocks that show a network of interconnected faults across the sierras. Basically it looks like an increasing fraction of the stress from the pacific plate and north american plate movement is in Nevada. Currently around 25% and the theory is that it's increasing over time.