The 1989 Loma Prieta earthquake filled a seismic gap and was actually predicted by the U.S.Geological Survey.

Question

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The US Geological Survey had predicted that there was a high likelihood of a major earthquake occurring in the San Francisco Bay Area, but the exact timing and location could not be predicted. The Loma Prieta earthquake, which occurred on October 17, 1989, filled a seismic gap in the area that had not experienced a major earthquake in over 80 years.

The 1989 Loma Prieta Earthquake Filled a Seismic Gap and Was