Earthquake · reviewed by a seismologist
M 1.6ml
Earthquake near Claremont, CA
No earthquake was likely felt in Claremont in the 24 hours to 3:57 am PST (11:57 UTC). The last one was M 2.7, 22 km (14 mi) E, at 1:09 am PDT on 8 October 2026, estimated intensity II (weak) in town; 158 felt reports to USGS. Every earthquake near Claremont
This page: a magnitude 1.6 earthquake was recorded 7 km (5 mi) north of Claremont, CA, at 7:14 am PST on 16 February 2020 (15:14 UTC), 7.7 km deep.
USGS: 7km N of Claremont, CA
8 km (5 mi) NW of Upland, CA · 65 km (40 mi) ENE of Los Angeles, CA
- When
- 7:14 am PST on 16 February 2020 ()
- Where
- 7 km (5 mi) north of Claremont, CA · earthquakes near Claremont
- Magnitude
- M 1.6 (ml)
- Depth
- 7.7 km below the surface
- Felt
- no reports yet
- Nearest
- Los Angeles County, 49 km W
- Nearest mapped fault
- Sierra Madre fault, 4 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 2459 days ago
Earthquake alerts for Claremont, CA
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
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 8 km (5 mi) from the epicentre. In Claremont, 7 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: Claremont 7 km, intensity II · La Verne 8 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 7.8 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
- Around the size people start to feel M 3.0 120× the energy of this one
- This earthquake M 1.6 about 7.8 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 2018-08-29 — about 14,000 times the energy of this one.
Before 2016, the USGS record lists 9 earthquakes of M5 or more within 50 km; the five largest:
- 6.2 3 km SE of San Bernardino, California · 44 km E of this epicentre
- 5.9 The 1987 Whittier Narrows, California Earthquake · 34 km WSW of this epicentre
- 5.8 The 1991 Sierra Madre, California Earthquake · 27 km WNW of this epicentre
- 5.5 The 1990 Upland, California Earthquake · 4 km SE of this epicentre
- 5.4 5km S of Chino Hills, CA · 24 km S 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 34.1633, -117.7277. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Los Angeles County, CA | 49 km (31 mi) | W | earthquakes near Los Angeles County |
| Orange County, CA | 54 km (34 mi) | S | earthquakes near Orange County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
54 earthquakes have been recorded within 50 km since this one.
- 1.6 3km ESE of Home Gardens, CA
- 1.5 12km ENE of North Tustin, CA
- 1.7 7km NNE of Fontana, CA
- 1.7 3km NNE of Montebello, CA
- 1.7 10km WSW of Corona, CA
- 2.1 4km SW of Lytle Creek, CA
- 1.7 0km NW of Loma Linda, CA
- 1.5 2km S of Home Gardens, CA
- 2.3 8km WSW of Lytle Creek, CA
- 2.3 2km SE of Loma Linda, CA
- 1.9 9km SW of Corona, CA
- 1.6 6km SSE of Ontario, CA
- 1.8 6km SE of Ontario, CA
- 2.2 5km NW of Mira Loma, CA
- 1.6 7km 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.