Note: The map shows the area with an earthquake intensity of 3 or higher, which is defined as “weak” by the USGS. However, the earthquake may be felt outside the areas shown. The New York Times
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.
Earthquakes and aftershocks within 100 miles
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.
Source: United States Geological Survey | Notes: Shaking categories are based on the modified Mercalli intensity scale. When aftershock data are available, corresponding maps and charts include earthquakes within 100 miles and seven days of the initial quake. All times listed above are Pacific Time. Shaking data are as of Monday, August 12, 12:25 p.m. Pacific Time. Aftershock data are as of Monday, August 12, 3:50 p.m. Pacific Time.
