This record is considered not to be from an actual earthquake. It could be due to some other (unkown) event causing shaking, such as weather, sonic booms. In other cases, officially reported quakes are sometimes removed again later.
This can happen if initial automatic calculations return an earthquake, but turn out to be wrong during subsequent (manual) revision.
The initial report is below:
Our monitoring service AllQuakes received reports of an earthquake in or near Near Los Angeles, California, USA at around 09:54 GMT. Unless confirmed by at least one national or international seismological agency, its status remains unconfirmed.
21 Apr 09:57 UTC: First to report: VolcanoDiscovery after 2 minutes.
I felt this quake
I didn’t feel it
Date & time: 21 Apr 2021 09:54:55 UTC –
Magnitude: unknown
Depth: 10.0 km
Epicenter latitude / longitude: 34.06121°N / 118.43362°W 
(California, United States)
Nearest volcano: Lavic Lake (183 km / 114 mi)
Primary data source: VolcanoDiscovery
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Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!
