QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1ml

Earthquake near Fort Irwin, CA

No earthquake was likely felt in Fort Irwin in the 24 hours to 2:12 am PST (10:12 UTC). The last one was M 4.3, 103 km (64 mi) W, at 9:40 am PDT on 13 July 2026, estimated intensity II (weak) in town; 1,090 felt reports to USGS. Every earthquake near Fort Irwin

This page: a magnitude 3.1 earthquake was recorded 37 km (23 mi) southeast of Fort Irwin, CA, at 4:57 pm PDT on 19 June 2019 (23:57 UTC), 1.6 km deep. 3 people have reported feeling it to USGS.

USGS: 37km SE of Fort Irwin, CA

4:57 pm PDT, Jun 19, 2019 · · 1.6 km deep · released about 1,600 lb of TNT

Every earthquake near Fort Irwin Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Bernardino County 29 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
4:57 pm PDT on 19 June 2019 ()
Where
37 km (23 mi) southeast of Fort Irwin, CA · earthquakes near Fort Irwin
Magnitude
M 3.1 (ml)
Depth
1.6 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
San Bernardino County, 29 km ESE
Nearest mapped fault
Manix fault, 3 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 2619 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 44 km (27 mi) from the epicentre. In Fort Irwin, 37 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: Fort Irwin 37 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1,600 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 210,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 9,400× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,700× the energy of this one
  4. This earthquake M 3.1 about 1,600 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.7× more

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 2016-02-20 — about 55 times the energy of this one.

Before 2016, the USGS record lists 9 earthquakes of M5 or more within 50 km; the five largest:

  1. 7.1 The 1999 Hector Mine, California Earthquake · 47 km SSE of this epicentre
  2. 6.5 The 1947 Manix, California Earthquake · 7 km W of this epicentre
  3. 5.8 13km WSW of Ludlow, CA · 38 km SSE of this epicentre
  4. 5.4 21km SW of Ludlow, California · 47 km SSE of this epicentre
  5. 5.3 20km ENE of Barstow, California · 33 km W 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 34.9897, -116.4590. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Bernardino County, CA 29 km (18 mi) ESE earthquakes near San Bernardino County

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

Aftershocks so far

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

  1. 2.8 12km NE of Barstow, CA
  2. 2.1 40km WNW of Ludlow, CA
  3. 2.0 40km WNW of Ludlow, CA
  4. 1.8 23km ENE of Barstow, CA
  5. 2.0 25 km W of Ludlow, CA
  6. 1.9 22km NNE of Barstow, CA
  7. 2.5 34km E of Barstow, CA
  8. 1.9 13km ENE of Fort Irwin, CA
  9. 1.6 23km NW of Ludlow, CA
  10. 2.0 12km NE of Barstow, CA
  11. 1.8 14km WSW of Ludlow, CA
  12. 1.9 24 km NE of Fort Irwin, California
  13. 2.3 22km NNE of Barstow, CA
  14. 2.1 10km NNW of Fort Irwin, CA
  15. 2.1 22km NNE of Barstow, 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.