Earthquake · reviewed by a seismologist
M 2.1ml
Earthquake near Agoura Hills, CA
No earthquake was likely felt in Agoura Hills in the 24 hours to 12:01 pm PST (20:01 UTC). The last one was M 2.3, 16 km (10 mi) SSW, at 4:53 am PDT on 16 October 2026, estimated intensity II (weak) in town; 2 felt reports to USGS. Every earthquake near Agoura Hills
This page: a magnitude 2.1 earthquake was recorded 6 km (3 mi) south-southwest of Agoura Hills, CA, at 3:00 am PST on 7 March 2021 (11:00 UTC), 13 km deep. 4 people have reported feeling it to USGS.
USGS: 6km SSW of Agoura Hills, CA
14 km (8 mi) SSE of Thousand Oaks, CA · 36 km (23 mi) WNW of Los Angeles, CA
- When
- 3:00 am PST on 7 March 2021 ()
- Where
- 6 km (3 mi) south-southwest of Agoura Hills, CA · earthquakes near Agoura Hills
- Magnitude
- M 2.1 (ml)
- Depth
- 13 km below the surface
- Felt
- 4 reports · strongest reported intensity II
- Nearest
- Ventura County, 43 km NW
- Nearest mapped fault
- Malibu Coast fault, 6 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 1007 days ago
Earthquake alerts for Agoura Hills, CA
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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 11 km (7 mi) from the epicentre. In Agoura Hills, 6 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: Agoura 8 km, intensity II · Thousand Oaks 10 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 40 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 380,000× the energy of this one
- Magna, Utah 2020 M 5.7 270,000× the energy of this one
- Around the size people start to feel M 3.0 24× the energy of this one
- This earthquake M 2.1 about 40 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 4.2 on 2020-07-30 — about 1,400 times the energy of this one.
Before 2016, the USGS record lists 16 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 Northridge, California, earthquake · 28 km ENE of this epicentre
- 5.9 1km ENE of Granada Hills, California · 35 km NE of this epicentre
- 5.6 7km NNE of Simi Valley, California · 28 km NNE of this epicentre
- 5.3 2 km SSW of Santa Monica, California · 29 km ESE of this epicentre
- 5.3 The 1973 Point Mugu, California Earthquake · 26 km WSW 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 34.0890, -118.7960. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Ventura County, CA | 43 km (27 mi) | NW | earthquakes near Ventura County |
| Los Angeles County, CA | 51 km (31 mi) | ENE | earthquakes near Los Angeles County |
| Orange County, CA | 105 km (65 mi) | ESE | earthquakes near Orange County |
| Santa Barbara County, CA | 124 km (77 mi) | WNW | earthquakes near Santa Barbara County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
59 earthquakes have been recorded within 50 km since this one.
- 2.2 1km NNW of Lennox, CA
- 1.8 8km NW of Malibu, CA
- 1.6 1km SE of Lennox, CA
- 2.1 1km SSW of Inglewood, CA
- 2.3 1km NE of Lennox, CA
- 1.6 2km NW of Lennox, CA
- 1.6 2km WSW of Inglewood, CA
- 2.3 0km ENE of Lennox, CA
- 1.7 0km W of Lennox, CA
- 1.6 1km S of Inglewood, CA
- 1.9 2km E of Lennox, CA
- 1.8 2km ESE of Inglewood, CA
- 1.6 1km ENE of Inglewood, CA
- 2.0 1km SE of Lennox, CA
- 1.9 1km SW of Inglewood, 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.