[SumProVita]

How close is that to Imperial Beach?

Here’s another list:

http://hewsweb.org/seismic

[forgotten man]

About 160 miles from Imperial Beach to Salton Sea, mas o menos.

[kingu]

The buttes are 120 miles, 140 if you drive it, from Imperial Beach. Not in the same neighborhood at all. (roughly the same distance, though in a different direction, that Los Angeles would be.)