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Small 3.1 quake hits near Ontario, San Bernardino County, California, USA / VolcanoDiscovery

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Sat, 20 Mar 2021, 23:09

23:09 PM | BY: EARTHQUAKEMONITOR

3.1 quake 20 Mar 3:49 pm (GMT -7)

A very shallow magnitude 3.1 earthquake was reported early afternoon near Ontario, San Bernardino County, California, USA.
According to the United States Geological Survey, the quake hit on Saturday 20 March 2021 at 3:49 pm local time at a very shallow depth of 2.9 miles. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. 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.
A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 2.9 earthquake.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in Ontario (pop. 171,200) located 3 miles from the epicenter, Rancho Cucamonga (pop. 175,200) 5 miles away, Upland (pop. 76,400) 5 miles away, and Chino (pop. 85,600) 5 miles away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Eastvale (pop. 59,000) located 6 miles from the epicenter, Pomona (pop. 153,300) 8 miles away, Chino Hills (pop. 78,300) 9 miles away, and Fontana (pop. 207,500) 10 miles away. In Los Angeles (pop. 3,971,900, 37 miles away), the quake was probably not felt.

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Earthquake data:

I felt this quake

Date & time: 20 Mar 2021 3:49 pm (GMT -7) local time (20 Mar 2021 22:49 GMT)
Magnitude: 3.1
Depth: 4.7 km
Epicenter latitude / longitude: 34.04°N / 117.61°W (San Bernardino Comitatus County, California, United States)
Primary data source: USGS

Previous news

We are receiving unverified early reports of seismic activity in or around California, USA at approximately 22:49 GMT. There are no details yet on the magnitude or depth of this earthquake. We expect more accurate data to emerge in the next few minutes. The location and magnitude mentioned are indicative and temporary until the AllQuakes monitoring service receives more exact scientific data from a national or international seismological agency. Check back here shortly and stay safe. … read all
3.1 quake 20 Mar 1:19 pm (GMT -8)
The United States Geological Survey reported a magnitude 3.1 quake in the United States near Kaktovik, North Slope, Alaska, only 13 minutes ago. The earthquake hit around noon on Saturday 20 March 2021 at 1:19 pm local time at a very shallow depth of miles. 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. … read all
5.0 quake 21 Mar 5:41 am (GMT +10)
The German Research Centre for Geosciences (GFZ) reported a magnitude 5.0 quake in Northern Mariana Islands near Alamagan Village, Alamagan Island, Northern Islands, only 13 minutes ago. The earthquake hit early morning on Sunday 21 March 2021 at 5:41 am local time at an intermediate to considerable depth of 197 km. 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. … read all
Worldwide earthquakes above magnitude 5 during March 2021
Summary: 1 quake 8.0+, 2 quakes 7.0+, 17 quakes 6.0+, 286 quakes 5.0+, 1182 quakes 4.0+, 4123 quakes 3.0+, 8314 quakes 2.0+ (13925 total) read all
3.6 quake 20 Mar 7:05 pm (GMT +1)
A magnitude 3.6 earthquake near Aurillac, Cantal, Auvergne-Rhône-Alpes, France, was reported only 15 minutes ago by the European-Mediterranean Seismological Centre (EMSC), considered one of the key international agencies that monitor seismic activity worldwide. The earthquake occurred at a very shallow depth of 5 km beneath the epicenter early evening on Saturday 20 March 2021 at 7:05 pm 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. … read all

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