Canie-the 100 m fault scarp would not be 1 earthquake-it would be 100 earthquakes (or something like that). A scarp is a topographic feature caused by motion on a fault. What is interesting about this fault (zone) is how far out it is-it is beyond offshore Santa Maria basin, beyond Santa Lucia Bank-it is way out in Santa Lucia (slope) basin.......

We go hiking in Harriman Park here at the edges of suburbia-near wilderness is separated from near suburbia by a 200 to 300 m-high fault lines scarp, along the Ramapo fault. There is seismicity along the Ramapo fault-including the earthquakes a few months ago near the Delaware River (what was that, a 3.5?). But, the highstanding footwall is resistant PreCambrian gneiss, and the low-standing hangingwall (suburbia) is red Triassic-Jurassic sandstone. So, differential erosion could do this.....but erosion is so slow except under ice streams here (e.g., Hudson) that some of the relief could be due to fault movement. But, it seems to be near impossible to tell if the fault has moved in the last few million or even tens of millions of years....Chris