A magnitude-3.6 earthquake was reported Friday morning in the Riverside County mountain community of Idyllwild.

The earthquake in the San Jacinto Mountains was reported at 9:43 a.m. Shaking was reported in Palm Springs, Indio, Cabazon, Claremont, Palm Desert and other areas.

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Some earthquakes are followed by a larger earthquake, in which case the first quake would then be called a foreshock. For example, the magnitude-9.1 Japan earthquake and tsunami in 2011 was preceded by a magnitude-7.3 foreshock two days earlier.

Aftershocks decrease over time, but can continue for days, weeks, months and years.

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