Quote:
Originally Posted by Danimal16
You will feel the earthquake on solid rock more so than on alluvium. The beauty is that the rock allows the shock wave to travel at high speed and low amplitude. On the other hand, alluvium slows the wave down resulting in significant increase in amplitude and that is where the bad ju-ju starts.
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I've heard this theory before. I was told that many houses in the Hollywood Hills are built on rock, and will best withstand a major earthquake. Anything near or on the coast, however, is as good as collapsed.
BTW: felt just a slight jolt and roll where I live.