1992 Big Bear earthquake

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1992 Big Bear earthquake
USGS Shakemap - 1992 Big Bear earthquake.jpg
1992 Big Bear earthquake is located in California
Los Angeles
Los Angeles
Palm Springs
Palm Springs
1992 Big Bear earthquake
Date June 28, 1992 (1992-06-28)
Origin time 15:05:33 UTC [1]
Magnitude 6.5 Mw [1]
Depth 3.1 miles (5 km) [2]
Epicenter 34°17′N 116°49′W / 34.29°N 116.82°W / 34.29; -116.82Coordinates: 34°17′N 116°49′W / 34.29°N 116.82°W / 34.29; -116.82 [2]
Type Strike-slip [2]
Areas affected Inland Empire
Southern California
United States
Total damage Moderate [3]
Max. intensity VIII (Severe) [4]
Foreshocks 5.2 Mw June 28 at 14:43 [5]
Aftershocks 5.3 Mw July 9 at 01:43 [5]
5.2 Mw Nov 27 at 16:00 [5]
5.1 Mw Dec 4 at 02:08 [5]
Casualties Some injuries [4]

The 1992 Big Bear earthquake occurred at 08:05:33 PDT on June 28 in Big Bear Lake, California, with a moment magnitude of 6.5 and a maximum perceived intensity of VIII (Severe) on the Mercalli intensity scale. The earthquake occurred at a relatively shallow depth of 5 kilometers (3.1 mi) and caused landslides in the San Bernardino Mountains.[6]

This earthquake occurred three hours after the 7.3 magnitude Landers earthquake, which was centered 22 miles (35 km) to the east. The closely timed occurrence of these earthquakes is an often-cited example of a regional earthquake sequence.[7] Both earthquakes had occurred significantly close to the southern portion of the San Andreas Fault, and the Landers event may have reduced the compressional stress in that area.[8]

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