Small magnitude 3.1 quake hits 31 miles north of Mammoth Lakes, California, United States after midnight
3.1 quake 28 Feb 12:24 am (GMT -8)

A magnitude 3.1 earthquake near Mammoth Lakes, Mono County, California, USA, was reported only 8 minutes ago by the United States Geological Survey, considered the key international and national agency that monitors seismic activity in the US. The earthquake occurred at a shallow depth of 6.2 miles beneath the epicenter after midnight on Sunday 28 February 2021 at 12:24 am local time. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 3.1 as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Mono City (pop. 170) located 14 miles from the epicenter. In Mammoth Lakes (pop. 7,900, 31 miles away), and Hawthorne (pop. 3,300, 33 miles away), the quake was probably not felt.


Earthquake data:
Date & time: 28 Feb 2021 12:24 am (GMT -8) local time (28 Feb 2021 08:24 GMT)
Magnitude: 3.1
Depth: 10.0 km
Epicenterlatitude / longitude: 38.1°N / 118.9°W (Mono County, California, United States)
Primary data source: USGS
https://www.volcanodiscovery.com/earthquake/news/123025/Small-magnitude-31-quake-hits-31-miles-north-of-Mammoth-Lakes-California-United-States-after-midnigh.html