Above are two hypocenter cross sections (within the circles) crossing the upthrust zones of the area of the San Simeon M6 earthquake of 2003 (close to NS section) and the other crossing the Irish Hills (SW-NE section) at the site of the Diablo Canyon plant, the latter with no recent M6 earthquakes. But maybe one on the way?
The San Simeon cross section is for the period 1988 through 2002, before the 2003 earthquake occurred. If you can identify which of the above is San Simeon do you see portents of a coming earthquake? All earthquakes in the Hardebeck catalog from 1988
to before 2003 are included, undifferentiated by magnitude. We know that at San Simeon the main shock and thousands of aftershocks were found after-the-fact to be roughly coincident with a broadly "V" shaped structure, creating a popup movement, showing here as a bowl or trough-shaped zone of crushing rock, ten to twenty kilometers long, pushing up those lonely peaks behind the Hearst Castle and north of DCNPP.
The other SW-NE section crossing the Irish Hills is very close to the Diablo Canyon plant. It includes all events 1998-2015.
Can you guess which is which? If so, you are surely on your way to being a wizard of sorts at predicting earthquakes based on the geometrical spread of preceding events.
