Earthquake · reviewed by a seismologist
M 1.7ml
Earthquake near Lucerne Valley, CA
No earthquake was likely felt in Lucerne Valley in the 24 hours to 5:17 am PST (13:17 UTC). The last one was M 2.6, 19 km (12 mi) SSE, at 1:40 am PDT on 6 October 2026, estimated intensity II (weak) in town; 18 felt reports to USGS. Every earthquake near Lucerne Valley
This page: a magnitude 1.7 earthquake was recorded 17 km (10 mi) east-northeast of Lucerne Valley, CA, at 3:19 pm PDT on 30 August 2020 (22:19 UTC), 7.5 km deep.
USGS: 17km ENE of Lucerne Valley, CA
82 km (51 mi) NE of Riverside, CA · 39 km (24 mi) E of Apple Valley, CA
- When
- 3:19 pm PDT on 30 August 2020 ()
- Where
- 17 km (10 mi) east-northeast of Lucerne Valley, CA · earthquakes near Lucerne Valley
- Magnitude
- M 1.7 (ml)
- Depth
- 7.5 km below the surface
- Felt
- no reports yet
- Nearest
- San Bernardino County, 70 km NE
- Nearest mapped fault
- Lenwood-Lockhart fault, 6 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 2264 days ago
Earthquake alerts for Lucerne Valley, 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 10 km (6 mi) from the epicentre. In Lucerne Valley, 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: Big Bear City, Big Bear Lake.
How big was it?
This earthquake released about 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
- Around the size people start to feel M 3.0 92× the energy of this one
- This earthquake M 1.7 about 10 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 8,500 times the energy of this one.
Before 2016, the USGS record lists 21 earthquakes of M5 or more within 50 km; the five largest:
- 7.3 The 1992 Landers, California Earthquake · 45 km SE of this epicentre
- 7.1 The 1999 Hector Mine, California Earthquake · 50 km ENE of this epicentre
- 6.3 The 1992 Big Bear, California Earthquake · 31 km S of this epicentre
- 5.6 7km ENE of Running Springs, CA · 35 km SW of this epicentre
- 5.5 11km SSE of Big Bear Lake, California · 36 km S 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 34.4773, -116.7885. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Bernardino County, CA | 70 km (43 mi) | NE | earthquakes near San Bernardino County |
| Riverside County, CA | 110 km (68 mi) | SE | earthquakes near Riverside County |
| Orange County, CA | 127 km (79 mi) | SW | earthquakes near Orange County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
26 earthquakes have been recorded within 50 km since this one.
- 2.1 18km SSE of Big Bear Lake, CA
- 2.0 15km W of Ludlow, CA
- 1.5 13km NNE of Yucaipa, CA
- 1.8 8km N of Big Bear City, CA
- 1.9 13km N of Banning, CA
- 1.8 21km N of Yucca Valley, CA
- 3.4 10km N of Big Bear City, CA
- 1.7 6km S of Big Bear City, CA
- 2.1 5km NNW of Big Bear City, CA
- 1.8 5km NNW of Big Bear City, CA
- 2.1 24km W of Ludlow, CA
- 2.0 14km NNE of Banning, CA
- 1.6 32km N of Yucca Valley, CA
- 2.0 18km SSE of Big Bear Lake, CA
- 1.9 18km N of Banning, 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.