Quake Info: Reported (unconfirmed) earthquake: Near San Jose, California, United States, April 18, 2021, 7:43 a.m. GMT

It is assumed that this record was not from an actual earthquake. This could be due to some other (unknown) event that causes tremors, such as: B. Weather and sonic booms. In other cases, officially reported quakes are sometimes removed later.

This can happen when initial automatic calculations return an earthquake, but turn out to be incorrect on subsequent (manual) revision.

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.

18 Apr 07:45 UTC: First report: VolcanoDiscovery after 3 minutes.

I felt this tremor

I didn’t feel it

Date and time: April 18, 2021 07:43:16 UTC –
Size: unknown
Depth: 10.0 km
Latitude / Longitude of epicenter: 37.29305 ° N / 122.00552 ° W. (California, USA)
Nearest volcano: Clear Lake (198 km)
Primary data source: VolcanoDiscovery

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Dates 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.

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User reports for this quake (1)

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0 km WNW of the epicenter [Map] / Very weak shaking (MMI II) / rattling, vibrating / 5-10 s : Floor vibration

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