Earthquake · reviewed by a seismologist
M 1.9ml
Earthquake near Barstow, CA
No earthquake was likely felt in Barstow in the 24 hours to 3:05 am PST (11:05 UTC). The last one was M 1.8, 3 km (2 mi) NNW, at 3:18 pm PDT on 17 July 2026, estimated intensity II (weak) in town; 1 felt report to USGS. Every earthquake near Barstow
This page: a magnitude 1.9 earthquake was recorded 17 km (10 mi) east-southeast of Barstow, CA, at 10:25 am PDT on 6 April 2017 (17:25 UTC), 8.4 km deep.
USGS: 17km ESE of Barstow, CA
50 km (31 mi) NE of Apple Valley, CA · 115 km (71 mi) NNE of Riverside, CA
- When
- 10:25 am PDT on 6 April 2017 ()
- Where
- 17 km (10 mi) east-southeast of Barstow, CA · earthquakes near Barstow
- Magnitude
- M 1.9 (ml)
- Depth
- 8.4 km below the surface
- Felt
- no reports yet
- Nearest
- San Bernardino County, 60 km E
- Nearest mapped fault
- Calico-Hidalgo fault, 8 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 3467 days ago
Earthquake alerts for Barstow, 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 12 km (7 mi) from the epicentre. In Barstow, 17 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.
Earthquakes near other towns within 30 km: Barstow Heights, Lenwood.
How big was it?
This earthquake released about 23 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 660,000× the energy of this one
- Magna, Utah 2020 M 5.7 470,000× the energy of this one
- Around the size people start to feel M 3.0 42× the energy of this one
- This earthquake M 1.9 about 23 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 2016-02-20 — about 3,800 times the energy of this one.
Before 2016, the USGS record lists 6 earthquakes of M5 or more within 50 km; the five largest:
- 6.5 The 1947 Manix, California Earthquake · 31 km ENE of this epicentre
- 5.3 20km ENE of Barstow, California · 12 km N of this epicentre
- 5.1 46 km E of Barstow, California · 30 km E of this epicentre
- 5.1 25km W of Ludlow, CA · 41 km ESE of this epicentre
- 5.1 26km WNW of Ludlow, CA · 39 km E 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 34.8672, -116.8432. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Bernardino County, CA | 60 km (38 mi) | E | earthquakes near San Bernardino County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
45 earthquakes have been recorded within 50 km since this one.
- 1.9 24km W of Ludlow, CA
- 2.3 16km NNE of Lucerne Valley, CA
- 1.6 25km WNW of Ludlow, CA
- 1.6 39km WSW of Ludlow, CA
- 1.6 38km WNW of Ludlow, CA
- 1.6 23km ENE of Barstow, CA
- 2.2 34km NE of Lucerne Valley, CA
- 1.8 13km NE of Barstow, CA
- 2.2 35km NE of Lucerne Valley, CA
- 1.8 21km SSE of Fort Irwin, CA
- 1.7 36km NE of Lucerne Valley, CA
- 1.6 15km NNE of Apple Valley, CA
- 1.6 4km NNW of Barstow, CA
- 2.3 27km ESE of Boron, CA
- 1.9 9km ENE 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
- 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.