Responses to the Loma Prieta Quake

Ten years after, the response to the quake is mixed. The Bay Area is not prepared for a repeat along the Hayward or the Peninsula strech of the San Andreas.

Share Your Stories of the Loma Prieta Quake

Where were you, what were you doing, what happened to you when the San Andreas fault failed at 5:04 PDT, October 17, 1989?

5.0 Tremblor in Marin

Ah, part of the fun of living in the Bay Area, the constant threat of earthquakes. Nothing compared to what the Turks are contending with, but enough to remind you to check your quake kit. Meanwhile, you can see the staggering number of 5.0+ aftershocks from the Turkish quake.

Underground Valleys Will Intensify the Shaking in the Next Big One

There’s a basin (a dip in crustal rocks) filled with 65 million years worth of sediments, beneath Cupertino. The basin could focus waves in a big quake.
But sometimes, a basin can act as a lens to focus shear waves — the most dangerous form of shaking in an earthquake. These waves shake in several directions [...]