Earthquake · reviewed by a seismologist
M 2.2ml
Earthquake near Muscoy, CA
No earthquake was likely felt in Muscoy in the 24 hours to 7:48 am PST (15:48 UTC). The last one was M 2.2, 17 km (10 mi) SE, at 8:15 pm PDT on 29 October 2026, estimated intensity II (weak) in town; 1 felt report to USGS. Every earthquake near Muscoy
This page: a magnitude 2.2 earthquake was recorded 4 km (2 mi) northeast of Muscoy, CA, at 7:40 am PDT on 12 July 2022 (14:40 UTC), 6.7 km deep. 1 person has reported feeling it to USGS.
USGS: 4km NE of Muscoy, CA
in San Bernardino, CA
- When
- 7:40 am PDT on 12 July 2022 ()
- Where
- 4 km (2 mi) northeast of Muscoy, CA · earthquakes near Muscoy
- Magnitude
- M 2.2 (ml)
- Depth
- 6.7 km below the surface
- Felt
- 1 report · strongest reported intensity II
- Nearest
- Orange County, 70 km SW
- Nearest mapped fault
- San Andreas fault, 2 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1584 days ago
Earthquake alerts for Muscoy, CA
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This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 17 km (11 mi) from the epicentre. In Muscoy, 4 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Likely felt in: Muscoy 4 km, intensity II · San Bernardino 8 km, intensity II · Rialto 9 km, intensity II · Highland 11 km, intensity II · Colton 11 km, intensity II · Lake Arrowhead 14 km, intensity II · Fontana 15 km, intensity II · Loma Linda 15 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 54 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 280,000× the energy of this one
- Magna, Utah 2020 M 5.7 200,000× the energy of this one
- Around the size people start to feel M 3.0 18× the energy of this one
- This earthquake M 2.2 about 54 lb of TNT
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
For this area
The largest earthquake within 50 km since 2016 was M 4.4 on 2016-01-06 — about 2,100 times the energy of this one.
Before 2016, the USGS record lists 15 earthquakes of M5 or more within 50 km; the five largest:
- 6.3 The 1992 Big Bear, California Earthquake · 45 km E of this epicentre
- 6.2 3 km SE of San Bernardino, California · 11 km SSE of this epicentre
- 5.6 7km ENE of Running Springs, CA · 26 km ENE of this epicentre
- 5.5 The 1990 Upland, California Earthquake · 36 km W of this epicentre
- 5.5 11km SSE of Big Bear Lake, California · 42 km E of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 34.1737, -117.3108. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 70 km (44 mi) | SW | earthquakes near Orange County |
| Los Angeles County, CA | 88 km (54 mi) | W | earthquakes near Los Angeles County |
| San Bernardino County, CA | 128 km (80 mi) | NE | earthquakes near San Bernardino County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
44 earthquakes have been recorded within 50 km since this one.
- 1.6 1km NW of Beaumont, CA
- 2.0 5km NW of Mira Loma, CA
- 1.6 7km SSE of Home Gardens, CA
- 2.1 3km W of Devore, CA
- 1.6 6km NNE of Beaumont, CA
- 3.2 8km NNE of Banning, CA
- 1.9 2km WNW of Beaumont, CA
- 1.7 5km NW of Mira Loma, CA
- 1.5 5km NW of Mira Loma, CA
- 2.2 1km SSE of Colton, CA
- 1.5 5km WSW of Fontana, CA
- 2.2 1km SE of Loma Linda, CA
- 2.0 5km NW of Mira Loma, CA
- 3.6 5km NW of Mira Loma, CA
- 1.7 5km SSE of Home Gardens, CA
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.