QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

Earthquake near Brawley, CA

No earthquake was likely felt in Brawley in the 24 hours to 8:03 am PST (16:03 UTC). The last one was M 4.9, 69 km (43 mi) SSE, at 10:27 am PST on 3 November 2026, estimated intensity III (weak) in town; 321 felt reports to USGS. Every earthquake near Brawley

This page: a magnitude 1.6 earthquake was recorded 43 km (26 mi) north-northwest of Brawley, CA, at 2:24 pm PDT on 25 October 2017 (21:24 UTC), 2.7 km deep.

USGS: 3km SSE of Bombay Beach, CA

2:24 pm PDT, Oct 25, 2017 · · 2.7 km deep · released about 7.3 lb of TNT

Every earthquake near Brawley Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Imperial County 47 kmRiverside County 52 kmSan Diego County 104 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
2:24 pm PDT on 25 October 2017 ()
Where
43 km (26 mi) north-northwest of Brawley, CA · earthquakes near Brawley
Magnitude
M 1.6 (ml)
Depth
2.7 km below the surface
Felt
no reports yet
Nearest
Imperial County, 47 km SE
Nearest mapped fault
Extra 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 3304 days ago

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 Brawley, 43 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.

Earthquakes near other towns within 30 km: Niland, Salton City, Calipatria.

How big was it?

This earthquake released about 7.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.3 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 4.3 on 2016-09-27 — about 13,000 times the energy of this one.

Before 2016, the USGS record lists 27 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.6 The 1942 Fish Creek Mountains, California Earthquake · 39 km S of this epicentre
  2. 6.6 The 1968 Borrego Mountain, California Earthquake · 39 km WSW of this epicentre
  3. 6.6 The 1987 Superstition Hills, California Earthquake · 37 km SSW of this epicentre
  4. 6.4 The 1954 San Jacinto Fault, California Earthquake · 33 km W of this epicentre
  5. 6.2 The 1987 Elmore Ranch, California Earthquake · 27 km SSW 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 33.3262, -115.7237. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Imperial County, CA 47 km (29 mi) SE earthquakes near Imperial County
Riverside County, CA 52 km (32 mi) NNW earthquakes near Riverside County
San Diego County, CA 104 km (64 mi) WSW earthquakes near San Diego County

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

Aftershocks so far

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

  1. 2.3 10km SW of Niland, CA
  2. 1.8 10km SW of Niland, CA
  3. 2.9 10km SW of Niland, CA
  4. 1.6 10km NE of Ocotillo Wells, CA
  5. 1.7 10km SW of Niland, CA
  6. 1.8 10km W of Niland, CA
  7. 2.0 10km SW of Niland, CA
  8. 2.2 10km NE of Ocotillo Wells, CA
  9. 2.1 14km SW of Westmorland, CA
  10. 2.0 14km SW of Westmorland, CA
  11. 1.8 15km SW of Westmorland, CA
  12. 2.2 12km WNW of Calipatria, CA
  13. 1.5 4km NE of Westmorland, CA
  14. 1.6 20km W of Westmorland, CA
  15. 1.8 11km NNE 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.