Using a set of assumptions about fault mechanics and the rate of stress accumulation, the USGS predicted that a Parkfield earthquake of about M 6.0 earthquake would occur between 1988 and 1992.

• 运用一系列关于断层力学和压力累积率的假设，美国地质调查局预测在1988年到1992年间在帕克菲尔德将会发生大约6.；0级的地震。