California-Nevada Fault Map centered at 33°N,121°W

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Earthquake map centered at 33°N,121°W
Advanced National Seismic System Homepage Santa Rosa Island fault map centered at 34° N, 122° W map centered at 34° N, 121° W map centered at 34° N, 120° W map centered at 33° N, 122° W map centered at 33° N, 120° W



  • Red lines are known faults (orange lines are unnamed faults).
  • Thin grey lines are roads.
  • Magnitude = ? for new earthquakes until a magnitude is determined (takes 4-5 minutes).
  • Earthquakes can appear near a fault without having occurred on that fault. To associate an earthquake with a fault requires viewing both of them in three-dimensions.
  • Maps show events recorded in the past 7 days.
  • Maps are updated whenever a new earthquake has been located. Try to reload this page if you do not have the most current map.