Earthquake · reviewed by a seismologist
M 1.5ml
Earthquake near Campo, CA
No earthquake was likely felt in Campo in the 24 hours to 11:23 am PST (19:23 UTC). The last one was M 4.9, 122 km (76 mi) E, at 10:27 am PST on 3 November 2026, estimated intensity II (weak) in town; 321 felt reports to USGS. Every earthquake near Campo
This page: a magnitude 1.5 earthquake was recorded 35 km (22 mi) east of Campo, CA, at 5:43 pm PDT on 3 April 2021 (00:43 UTC), 1.2 km deep.
USGS: 17km SW of Ocotillo, CA
100 km (62 mi) ESE of San Diego, CA
- When
- 5:43 pm PDT on 3 April 2021 ()
- Where
- 35 km (22 mi) east of Campo, CA · earthquakes near Campo
- Magnitude
- M 1.5 (ml)
- Depth
- 1.2 km below the surface
- Felt
- no reports yet
- Nearest
- San Diego County, 79 km NW
- Nearest mapped fault
- Elsinore fault, 20 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 2046 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 10 km (6 mi) from the epicentre. In Campo, 35 km away, the estimate is intensity I (not felt). 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 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
- Around the size people start to feel M 3.0 170× the energy of this one
- This earthquake M 1.5 about 5.6 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 2020-05-10 — about 35,000 times the energy of this one.
Before 2016, the USGS record lists 6 earthquakes of M5 or more within 50 km; the five largest:
- 5.7 8km ESE of Ocotillo, CA · 21 km ENE of this epicentre
- 5.3 15km SSW of Progreso, B.C., MX · 47 km ESE of this epicentre
- 5.2 21km NW of Ocotillo, CA · 30 km N of this epicentre
- 5.1 40km SSW of Progreso, B.C., MX · 49 km SE of this epicentre
- 5.0 11 km N of Seeley, California · 50 km NE 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 32.6055, -116.0982. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Diego County, CA | 79 km (49 mi) | NW | earthquakes near San Diego County |
| Imperial County, CA | 85 km (53 mi) | NE | earthquakes near Imperial County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
56 earthquakes have been recorded within 50 km since this one.
- 1.6 17km E of Ocotillo, CA
- 1.9 16km E of Ocotillo, CA
- 1.5 24km SSW of Ocotillo Wells, CA
- 1.8 8km W of Progreso, B.C., MX
- 1.5 18km E of Ocotillo, CA
- 1.8 18km SE of Ocotillo Wells, CA
- 1.7 17km E of Ocotillo, CA
- 2.0 16km E of Ocotillo, CA
- 1.6 17km E of Ocotillo, CA
- 1.7 18km E of Ocotillo, CA
- 2.4 13km W of Imperial, CA
- 2.4 16km E of Ocotillo, CA
- 1.5 24km SSW of Ocotillo Wells, CA
- 1.9 16km E of Ocotillo, CA
- 1.8 4km SW of Progreso, 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.