Napa, California. Jack and Evan Menzel look at the wave pattern in the swimming pool and the water that splashed out of the pool at the residence of Peter Menzel a minute after the earthquake that shook their home 107 miles from the epicenter of the October 17, 1989 Loma Prieta Earthquake. At a magnitude of 7.1, it was the worst earthquake in the San Francisco Bay Area since 1906. MODEL RELEASED..