Julian (dsch) wrote in lolscience,

Today's dose of LOLfaults!

An exceedingly badly-placed neighborhood in Devore, California.

Instated after the 1971 San Fernando earthquake, the Alquist-Priolo Act set up a bunch of earthquake safety building requirements, one of which is that new buildings may not be erected within fifty feet of an active fault trace. It seems that the developers of this particular house, in Devore, California, were being careful about the San Andreas, which is at the base of the mountains to the left of the photo, but they failed to acknowledge that it's not the only fault around. This house is on the edge of a huge scarp (the dropoff is just off-frame to the right) caused by a dip-slip fault.

Speaking of the 1971 quake, the parking lot to this McDonald's in San Fernando is built on the 1971 surface rupture trace. That hill to the left of the drive through lane (with all the light poles on it) is the scarp, landscaped rather than flattened. I think the people in the drive through must have thought I was insane, wandering around a McDonald's with a camera! (And yes, I did go inside, and I did order a shake, thankyewverymuch.)

The 1857 Fort Tejon earthquake is considered the largest San Andreas quake in historic times. Its surface rupture scar is still quite visible along much of its length. This particularly stunning example is near Wrightwood. The fault made that trench all by itself!
Tags: gelology
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