Earthquake · reviewed by a seismologist
M 2.3ml
33 km E of Primo Tapia, B.C., MX
Yes. A magnitude 2.3 earthquake was recorded 33 km E of Primo Tapia, B.C., MX, 85 km (53 mi) SE of San Diego, CA, at 10:16 pm PDT on 28 July 2025 (05:16 UTC), 18 km deep.
85 km (53 mi) SE of San Diego, CA
- When
- Magnitude
- M 2.3 (ml)
- Depth
- 18 km below the surface
- Felt
- no reports yet
- Nearest
- San Diego County, 91 km NNW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 471 days ago
Earthquake alerts for Campo, 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 9 km (6 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 91 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 170,000× the energy of this one
- Magna, Utah 2020 M 5.7 120,000× the energy of this one
- Around the size people start to feel M 3.0 10× the energy of this one
- This earthquake M 2.3 about 91 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 4.5 on 2022-04-15 — about 2,100 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 32.2232, -116.5653. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Diego County, CA | 91 km (57 mi) | NNW | earthquakes near San Diego County |
| Imperial County, CA | 145 km (90 mi) | NE | earthquakes near Imperial County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
49 earthquakes have been recorded within 50 km since this one.
- 1.7 32 km NE of Ensenada, B.C., MX
- 1.8 28 km ESE of Campo, CA
- 1.6 44 km SSE of Campo, CA
- 1.5 36 km E of Primo Tapia, B.C., MX
- 1.9 25 km SE of Campo, CA
- 1.8 27 km NNE of El Sauzal, B.C., MX
- 1.7 24 km NE of Primo Tapia, B.C., MX
- 2.9 34 km NE of Ensenada, B.C., MX
- 2.1 32 km SSE of Campo, CA
- 2.9 7 km ENE of Ensenada, B.C., MX
- 1.9 33 km NE of Ensenada, B.C., MX
- 2.0 39 km ENE of Ensenada, B.C., MX
- 1.9 43 km ENE of Ensenada, B.C., MX
- 2.2 37 km ENE of Ensenada, B.C., MX
- 2.0 34 km NE 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.