According to the United States Geological Survey, a minor earthquake measuring 4.4 on the Richter scale struck Southern California on Monday.
The quake struck at 12:20 p.m. Pacific time about two miles southeast of Highland Park, California, according to agency data.
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When seismologists review the available data, they can correct the reported magnitude of the earthquake. Additional information collected about the earthquake can also prompt USGS scientists to update the earthquake magnitude map.
Aftershocks in the region
An aftershock is usually a smaller earthquake that follows a larger one in the same area. Aftershocks are typically small displacements along the portion of a fault that was shifting at the time of the first earthquake.
Aftershocks can occur days, weeks, or even years after the initial earthquake. These events can be as strong or even stronger than the first earthquake and can continue to affect areas that have already been damaged.