Earthquake · reviewed by a seismologist
M 1.6ml
Earthquake near Barstow Heights, CA
No earthquake was likely felt in Barstow Heights in the 24 hours to 4:43 am PST (12:43 UTC). The last one was M 1.8, 6 km (4 mi) NNE, at 3:18 pm PDT on 17 July 2026, estimated intensity II (weak) in town; 1 felt report to USGS. Every earthquake near Barstow Heights
This page: a magnitude 1.6 earthquake was recorded 48 km (30 mi) southeast of Barstow Heights, CA, at 10:51 am PDT on 1 September 2020 (17:51 UTC), 7.5 km deep.
USGS: 35km ENE of Lucerne Valley, CA
53 km (33 mi) E of Apple Valley, CA · 102 km (63 mi) NE of Riverside, CA
- When
- 10:51 am PDT on 1 September 2020 ()
- Where
- 48 km (30 mi) southeast of Barstow Heights, CA · earthquakes near Barstow Heights
- Magnitude
- M 1.6 (ml)
- Depth
- 7.5 km below the surface
- Felt
- no reports yet
- Nearest
- San Bernardino County, 50 km NE
- Nearest mapped fault
- Camp Rock-Emerson-Copper Mountain fault, under 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 2262 days ago
Earthquake alerts for Barstow Heights, 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 8 km (5 mi) from the epicentre. In Barstow Heights, 48 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 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.
- Mineral, Virginia 2011 M 5.8 2,100,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
- Around the size people start to feel M 3.0 130× the energy of this one
- 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 2016-02-20 — about 12,000 times the energy of this one.
Before 2016, the USGS record lists 20 earthquakes of M5 or more within 50 km; the five largest:
- 7.3 The 1992 Landers, California Earthquake · 49 km SSE of this epicentre
- 7.1 The 1999 Hector Mine, California Earthquake · 34 km E of this epicentre
- 6.5 The 1947 Manix, California Earthquake · 43 km NNE of this epicentre
- 6.3 The 1992 Big Bear, California Earthquake · 48 km SSW of this epicentre
- 5.8 13km WSW of Ludlow, CA · 33 km ENE 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 34.6065, -116.6387. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Bernardino County, CA | 50 km (31 mi) | NE | earthquakes near San Bernardino County |
| Riverside County, CA | 114 km (71 mi) | SSE | earthquakes near Riverside County |
| Orange County, CA | 147 km (92 mi) | SW | earthquakes near Orange County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
58 earthquakes have been recorded within 50 km since this one.
- 1.8 22km NW of Ludlow, CA
- 1.6 14km WNW of Ludlow, CA
- 1.7 23km NW of Ludlow, CA
- 1.7 30km WSW of Ludlow, CA
- 2.4 22km NW of Ludlow, CA
- 2.2 23km NW of Ludlow, CA
- 1.6 23km NW of Ludlow, CA
- 3.5 23km NW of Ludlow, CA
- 2.4 15km W of Ludlow, CA
- 2.6 14km WSW of Ludlow, CA
- 1.9 23km NW of Ludlow, CA
- 1.8 23km NW of Ludlow, CA
- 2.2 23km NW of Ludlow, CA
- 1.6 12km ESE of Big Bear City, CA
- 2.6 22km NW of Ludlow, 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.