There was a M4 oblique reverse/thrust offshore San Diego. This was relatively far east of the M4.1 strike-slip earthquake about on June 20 on or near the right-lateral San Diego trough fault. I am working with a student who is mapping the area north of this quake, but including the same area; he will present at SCEC meeting mid September on at least the Carlsbad fault.

This far south, the bathymetry and the subsurface structure preserve extension from before 2 million years ago, and in some areas, probably active extension. There is little evidence for contraction consistent with this earthquake: the contraction is probably both young and slow and had not accumulated folds etc.

This quake is of a little more than academic interest because the faults systems are at least related to the Palos Verdes fault and the Newport Inglewood fault, as we will show.
Chris
Chris

• M4.1 Coronado bank