Quake information: Reported (unconfirmed) earthquake: 4.6 mi southwest of San Francisco, California, USA, 2 Could 2021 09:52 GMT
Quake status: very uncertain
It is assumed that this recording did not come from an actual earthquake as there is no officially confirmed quake that exactly matches the user reports we received of the reported event.
In most cases, this event likely reflects something else that caused the tremors, such as B. an explosion (typical of mining areas), a sonic boom, traffic, weather, or some other human or natural cause.
The first report is below:
Although our monitoring service initially determined network activity typical of an earthquake, there was no confirmation from a national or international seismological agency. Because of this, it is highly unlikely that it was caused by an earthquake.
May 2nd, 10:24 UTC: First report: VolcanoDiscovery after 32 minutes.
I felt this tremor
I didn’t feel it
Date and time: May 2, 2021 09:52:14 UTC –
Size: unknown
Depth: 10.0 km
Latitude / Longitude of epicenter: 37.74331 ° N / 122.49327 ° W. 
(California, USA)
Nearest volcano: Clear Lake (139 km)
Primary data source: VolcanoDiscovery
[show map]
[smaller] [bigger]
If you felt this quake (or if you were near the epicenter) please share your experience with us and submit a short “I Felt It” report! Other users would love to hear about it!
Even if you did NOT feel the quake even though you were in the area, please Report it! Your contribution is also useful for earthquake research and for earthquake hazard analysis and mitigation. You can use your device’s location or the map to tell you where you were during the earthquake. Many Thanks!
Data for the same earthquake reported by different authorities
Info: The more agencies report on the same quake and publish similar data, the more confidence you can have in the data. It usually takes up to a few hours for the earthquake parameters to be calculated with near optimal accuracy.
| size | depth | place | source |
User reports for this quake (1)
Contribute:
Leave a comment if you find a particular report interesting or want to add to it.
Report as inappropriate.
Mark as helpful or interesting.
Submit your own user report!
0 km NNE of the epicenter [Map] / Light shaking (MMI IV) / single side shaking / 1-2 s : Woke me up!
Try our free app!
Previous earthquakes in the same area
Please wait as we search millions of records.
This can take up to 20-30 seconds.
Click here to search our database for previous earthquakes in the same region since 1900!
