Earthquake · reviewed by a seismologist
M 1.7ml
Earthquake near Hesperia, CA
No earthquake was likely felt in Hesperia in the 24 hours to 2:39 am PST (10:39 UTC). The last one was M 4.3, 109 km (68 mi) NNW, at 9:40 am PDT on 13 July 2026, estimated intensity II (weak) in town; 1,090 felt reports to USGS. Every earthquake near Hesperia
This page: a magnitude 1.7 earthquake was recorded 8 km (5 mi) south of Hesperia, CA, at 2:32 am PDT on 26 May 2018 (09:32 UTC), 2.8 km deep.
USGS: 8km S of Hesperia, CA
in Hesperia, CA · 110 km (68 mi) ENE of Los Angeles, CA
- When
- 2:32 am PDT on 26 May 2018 ()
- Where
- 8 km (5 mi) south of Hesperia, CA · earthquakes near Hesperia
- Magnitude
- M 1.7 (ml)
- Depth
- 2.8 km below the surface
- Felt
- no reports yet
- Nearest
- Orange County, 88 km SSW
- Nearest mapped fault
- Cleghorn fault, 5 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 3030 days ago
Earthquake alerts for Hesperia, CA
Get a notification in this browser when USGS records an earthquake near Hesperia, CA. No account or email needed.
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 Hesperia, 8 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: Hesperia 8 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 9.3 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 1,600,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
- Around the size people start to feel M 3.0 100× the energy of this one
- This earthquake M 1.7 about 9.3 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
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record lists 14 earthquakes of M5 or more within 50 km; the five largest:
- 6.3 The 1992 Big Bear, California Earthquake · 46 km ESE of this epicentre
- 6.2 3 km SE of San Bernardino, California · 30 km S of this epicentre
- 5.6 7km ENE of Running Springs, CA · 27 km ESE of this epicentre
- 5.5 The 1990 Upland, California Earthquake · 44 km WSW of this epicentre
- 5.5 11km SSE of Big Bear Lake, California · 46 km ESE 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 34.3595, -117.2897. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 88 km (55 mi) | SSW | earthquakes near Orange County |
| Los Angeles County, CA | 91 km (57 mi) | W | earthquakes near Los Angeles County |
| San Bernardino County, CA | 116 km (72 mi) | ENE | earthquakes near San Bernardino County |
| Riverside County, CA | 138 km (86 mi) | ESE | earthquakes near Riverside 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.
- 1.5 3km SE of Yucaipa, CA
- 1.7 5km NNW of Big Bear City, CA
- 1.9 3km SSE of Loma Linda, CA
- 1.6 12km NE of Yucaipa, CA
- 3.1 4km ENE of Calimesa, CA
- 1.7 6km NW of Glen Avon, CA
- 1.8 2km W of Loma Linda, CA
- 1.7 6km NW of Highland, CA
- 2.0 6km NW of Highland, CA
- 1.6 6km SSW of Redlands, CA
- 2.1 4km NW of Glen Avon, CA
- 2.4 6km SE of Ontario, CA
- 1.7 6km SE of Ontario, CA
- 2.1 2km SSE of Devore, CA
- 1.7 3km SE of Loma Linda, 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.