Earthquake · reviewed by a seismologist
M 1.9ml
Earthquake near Duarte, CA
No earthquake was likely felt in Duarte in the 24 hours to 5:15 am PST (13:15 UTC). The last one was M 3.8, 78 km (48 mi) WNW, at 8:00 pm PDT on 29 September 2026, estimated intensity II (weak) in town; 199 felt reports to USGS. Every earthquake near Duarte
This page: a magnitude 1.9 earthquake was recorded 3 km (2 mi) south of Duarte, CA, at 6:10 am PDT on 8 July 2022 (13:10 UTC), 11 km deep.
USGS: 3km S of Duarte, CA
in Baldwin Park, CA · 41 km (25 mi) ENE of Los Angeles, CA
- When
- 6:10 am PDT on 8 July 2022 ()
- Where
- 3 km (2 mi) south of Duarte, CA · earthquakes near Duarte
- Magnitude
- M 1.9 (ml)
- Depth
- 11 km below the surface
- Felt
- no reports yet
- Nearest
- Los Angeles County, 27 km WNW
- 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 1586 days ago
Earthquake alerts for Duarte, CA
Get a notification in this browser when USGS records an earthquake near Duarte, CA. No account or email needed.
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 10 km (6 mi) from the epicentre. In Duarte, 3 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: Baldwin Park 4 km, intensity II · Monrovia 4 km, intensity II · Arcadia 6 km, intensity II · West Covina 6 km, intensity II · El Monte 7 km, intensity II · Temple City 7 km, intensity II · Azusa 7 km, intensity II · Sierra Madre 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 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 620,000× the energy of this one
- Magna, Utah 2020 M 5.7 440,000× the energy of this one
- Around the size people start to feel M 3.0 39× the energy of this one
- This earthquake M 1.9 about 25 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 4.5 on 2020-09-19 — about 7,900 times the energy of this one.
Before 2016, the USGS record lists 17 earthquakes of M5 or more within 50 km; the five largest:
- 6.6 1971 San Fernando Earthquake, California · 49 km NW of this epicentre
- 5.9 The 1987 Whittier Narrows, California Earthquake · 11 km WSW of this epicentre
- 5.8 10km SSW of Agua Dulce, CA · 49 km NW of this epicentre
- 5.8 10km SSW of Agua Dulce, CA · 49 km NW of this epicentre
- 5.8 The 1991 Sierra Madre, California Earthquake · 17 km N 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 34.1142, -117.9823. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Los Angeles County, CA | 27 km (17 mi) | WNW | earthquakes near Los Angeles County |
| Orange County, CA | 52 km (32 mi) | SSE | earthquakes near Orange County |
| Ventura County, CA | 109 km (68 mi) | WNW | earthquakes near Ventura County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
42 earthquakes have been recorded within 50 km since this one.
- 1.6 3km ESE of Granada Hills, CA
- 1.6 4km SSW of Llano, CA
- 2.5 2km ENE of Carson, CA
- 1.5 1km SSW of View Park-Windsor Hills, CA
- 1.8 3km NE of Silver Lake, CA
- 3.1 5km ESE of Yorba Linda, CA
- 1.6 5km NW of Mira Loma, CA
- 1.6 3km S of Westminster, CA
- 1.5 4km S of Westminster, CA
- 1.7 3km SW of La Verne, CA
- 1.7 4km ENE of Villa Park, CA
- 1.5 6km SSE of Pearblossom, CA
- 2.1 6km N of Fontana, CA
- 2.0 5km NW of Mira Loma, CA
- 1.7 5km NW of Mira Loma, 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.