A magnitude 3.1 earthquake struck 9 km ENE of Blackhawk, CA at Sep 12, 3:25 AM ET, 16 km deep, minor – felt by people near the epicenter. 257 people reported feeling it.
How strong was the 9 km ENE of Blackhawk, CA earthquake?
Magnitude 3.1 (ml), minor – felt by people near the epicenter. Depth 16 km.
Was it felt?
257 people reported feeling it to the USGS "Did You Feel It?" survey; the highest reported intensity was 3.4.
Were there aftershocks?
No earthquakes within 100 km have followed so far in our records.
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Source: U.S. Geological Survey (USGS) earthquake catalog, real-time feeds and FDSN event service; magnitudes and locations are revised by seismologists for hours after an event. Times are Eastern (ET) unless marked UTC. Not an alert service: for warnings follow local authorities and tsunami centers.
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M3.1 earthquake 9 km ENE of Blackhawk, CA — 77.today