I think there isn't too much concern about quakes - most of the buildings aren't that tall (though they are building them taller these days) - the housing density is rather high.

There has been some research going on down there with the San Joaquin Hills by Lisa Grant - there is one article linked below. - I'm sure there's more around by now.

I know when we moved down there in 1970 one thing my dad said was that we were safe from quakes! He would surely be surprised today (he's not here anymore). The house is just north of Dana Point.

Canie

• Press release