Earthquake · reviewed by a seismologist
M 2.1ml
42km ENE of Ensenada, B.C., MX
Yes. A magnitude 2.1 earthquake was recorded 42km ENE of Ensenada, B.C., MX, at 1:35 am PST on 3 December 2021 (09:35 UTC), 11 km deep.
- When
- Magnitude
- M 2.1 (ml)
- Depth
- 11 km below the surface
- Felt
- no reports yet
- Nearest
- San Diego County, 118 km NNW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1805 days ago
Earthquake alerts for Campo, CA
Get a notification in this browser when USGS records an earthquake near Campo, 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 12 km (7 mi) from the epicentre. 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.
How big was it?
This earthquake released about 37 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 5.8 410,000× the energy of this one
- Magna, Utah 2020 M 5.7 290,000× the energy of this one
- Around the size people start to feel M 3.0 26× the energy of this one
- This earthquake M 2.1 about 37 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 in our catalogue was M 4.2 on 2018-07-25 — about 1,600 times the energy of this one.
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 32.0595, -116.2407. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Diego County, CA | 118 km (74 mi) | NNW | earthquakes near San Diego County |
| Imperial County, CA | 137 km (85 mi) | NE | earthquakes near Imperial County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
40 earthquakes have been recorded within 50 km since this one.
- 2.1 43km ENE of Ensenada, B.C., MX
- 2.4 33km ENE of Ensenada, B.C., MX
- 1.5 37km NE of Ensenada, B.C., MX
- 2.6 48km ENE of Maneadero, B.C., MX
- 1.8 31km ENE of Ensenada, B.C., MX
- 2.6 39km ENE of Maneadero, B.C., MX
- 2.3 69km ENE of Maneadero, B.C., MX
- 2.0 14km NNW of El Sauzal, B.C., MX
- 2.2 51km E of Ensenada, B.C., MX
- 2.2 43km ENE of Maneadero, B.C., MX
- 2.7 35km ENE of Maneadero, B.C., MX
- 2.8 34km E of Ensenada, B.C., MX
- 1.6 40km NNE of Ensenada, B.C., MX
- 2.4 39km ENE of Maneadero, B.C., MX
- 1.9 44km ENE of Ensenada, B.C., MX
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.