In February of 1864, a M5.9 quake occurred north of Watsonville and caused widespread local damage and was felt as far away as Napa. In 1890, there was a quake that measured M6.0 that damaged brick and framed buildings from San Juan Bautista to Green Valley. The San Andreas fault was said to have had surface ruptures where it crossed the Pajaro River. This quake apparently had a robust aftershock sequence which lasted several days. The M6.2 and M6.1 earthquakes triggered exactly one hour apart and caused considerable damage at Monterey and Santa Cruz and substantial damage at San Juan Bautista.
All data are preliminary and subject to change.
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