M5.5, Lake Almanor near Chester, California

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SUMMARY

A 5.5 magnitude earthquake struck the east shore of Lake Almanor, California, on May 11, 2023, at 4:19 p.m. local time. The U.S. Geological Survey reported the epicenter was located approximately 2 km south-southwest of East Shore, at a depth of -1.5 km. The tremors were felt in Butte County and surrounding areas, with minor aftershocks occurring shortly thereafter. For detailed seismic data, refer to the USGS event page.

PREREQUISITES
  • Understanding of seismic activity and earthquake measurement scales
  • Familiarity with the U.S. Geological Survey (USGS) earthquake reporting tools
  • Knowledge of geographical coordinates and their significance in locating seismic events
  • Basic awareness of earthquake preparedness and safety measures
NEXT STEPS
  • Research the USGS Earthquake Hazards Program for real-time earthquake data
  • Learn about earthquake preparedness strategies for residents in seismic zones
  • Explore the geological features of the Lake Almanor region and their relation to seismic activity
  • Investigate the impact of earthquakes on local infrastructure and emergency response protocols
USEFUL FOR

This discussion is beneficial for geologists, emergency management professionals, residents in earthquake-prone areas, and anyone interested in understanding seismic events and their implications.

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CHESTER — A 5.5 magnitude earthquake hit the east shore of Lake Almanor on Thursday and its impact was felt in Butte County and beyond.

The U.S. Geological Survey reported on its earthquake site that the earthquake was -1.5 km deep and shook at 4:19 p.m. The epicenter was located about 2 km south-southwest of East Shore on the lake.
https://www.chicoer.com/2023/05/11/earthquake-shakes-north-state/

https://earthquake.usgs.gov/earthqu...20.94368&listOnlyShown=true&baseLayer=terrain

https://earthquake.usgs.gov/earthquakes/eventpage/nc73886731/executive

M 5.5 - 4km SW of East Shore, CA​

  • 2023-05-11 23:19:41 (UTC)
  • 40.216°N 121.109°W
  • -1.5 km depth (1.5 km above mean sea level)
Some small aftershocks as well.
 

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