QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8ml

Earthquake near Borrego Springs, CA

No earthquake was likely felt in Borrego Springs in the 24 hours to 1:45 pm PST (21:45 UTC). The last one was M 4.9, 145 km (90 mi) SE, at 10:27 am PST on 3 November 2026, estimated intensity II (weak) in town; 321 felt reports to USGS. Every earthquake near Borrego Springs

This page: a magnitude 2.8 earthquake was recorded 12 km (7 mi) north of Borrego Springs, CA, at 9:50 am PDT on 23 April 2019 (16:50 UTC), 12 km deep. 4 people have reported feeling it to USGS.

USGS: 12km N of Borrego Springs, CA

92 km (57 mi) NE of San Diego, CA · 42 km (26 mi) S of Palm Desert, CA

9:50 am PDT, Apr 23, 2019 · · 12 km deep · released about 400 lb of TNT

Every earthquake near Borrego Springs Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Diego County 52 kmRiverside County 55 kmImperial County 103 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
9:50 am PDT on 23 April 2019 ()
Where
12 km (7 mi) north of Borrego Springs, CA · earthquakes near Borrego Springs
Magnitude
M 2.8 (ml)
Depth
12 km below the surface
Felt
4 reports · strongest reported intensity III
Nearest
San Diego County, 52 km SW
Nearest mapped fault
San Jacinto fault, 1 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 2759 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 23 km (14 mi) from the epicentre. In Borrego Springs, 12 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: Borrego Springs 12 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 400 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 38,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 27,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.4× the energy of this one
  4. This earthquake M 2.8 about 400 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 5.2 on 2016-06-10 — about 4,600 times the energy of this one.

Before 2016, the USGS record lists 14 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.6 The 1968 Borrego Mountain, California Earthquake · 34 km SE of this epicentre
  2. 6.4 The 1954 San Jacinto Fault, California Earthquake · 30 km ESE of this epicentre
  3. 6.0 16km WSW of Oasis, CA · 14 km ENE of this epicentre
  4. 5.7 Eastern San Diego County, California · 33 km ESE of this epicentre
  5. 5.5 8km NNE of Ocotillo Wells, CA · 32 km ESE 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 33.3607, -116.3948. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Diego County, CA 52 km (32 mi) SW earthquakes near San Diego County
Riverside County, CA 55 km (34 mi) NE earthquakes near Riverside County
Imperial County, CA 103 km (64 mi) ESE earthquakes near Imperial County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

51 earthquakes have been recorded within 50 km since this one.

  1. 2.0 8km NE of Aguanga, CA
  2. 1.8 8km NE of Aguanga, CA
  3. 1.5 8km NE of Aguanga, CA
  4. 1.6 2km SE of Lake Henshaw, CA
  5. 1.6 11km NE of Aguanga, CA
  6. 1.8 11km ENE of Borrego Springs, CA
  7. 1.7 11km ENE of Aguanga, CA
  8. 1.9 3km SE of Lake Henshaw, CA
  9. 2.7 23km SW of Ocotillo Wells, CA
  10. 2.1 11km NNE of Ocotillo Wells, CA
  11. 2.1 23km SW of Ocotillo Wells, CA
  12. 1.9 23km SW of Ocotillo Wells, CA
  13. 1.5 18km SSW of Oasis, CA
  14. 1.9 23km SW of Ocotillo Wells, CA
  15. 2.6 23km SW of Ocotillo Wells, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.