Earthquake · reviewed by a seismologist
M 1.7ml
Earthquake near Moreno Valley, CA
No earthquake was likely felt in Moreno Valley in the 24 hours to 11:46 pm PST (07:46 UTC). The last one was M 2.1, 11 km (7 mi) N, at 10:40 am PDT on 31 October 2026, estimated intensity II (weak) in town. Every earthquake near Moreno Valley
This page: a magnitude 1.7 earthquake was recorded in Moreno Valley, CA, at 7:42 am PDT on 15 August 2017 (14:42 UTC), 10 km deep.
USGS: 3km NNE of Moreno Valley, CA
in Moreno Valley, CA
- When
- 7:42 am PDT on 15 August 2017 ()
- Where
- in Moreno Valley, CA · earthquakes near Moreno Valley
- Magnitude
- M 1.7 (ml)
- Depth
- 10 km below the surface
- Felt
- no reports yet
- Nearest
- Orange County, 60 km WSW
- Nearest mapped fault
- San Jacinto 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 3303 days ago
Earthquake alerts for Moreno Valley, CA
Get a notification in this browser when USGS records an earthquake near Moreno Valley, 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 6 km (4 mi) from the epicentre. 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: Moreno Valley in town, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 9.6 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 99× the energy of this one
- This earthquake M 1.7 about 9.6 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 4.4 on 2016-01-06 — about 12,000 times the energy of this one.
Before 2016, the USGS record lists 22 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 The 1918 San Jacinto, California Earthquake · 31 km SE of this epicentre
- 6.3 The 1992 Big Bear, California Earthquake · 46 km NE of this epicentre
- 6.2 3 km SE of San Bernardino, California · 16 km NNW of this epicentre
- 6.0 The 1910 Lake Elsinore, California Earthquake · 32 km SSW of this epicentre
- 5.6 7km ENE of Running Springs, CA · 36 km NNE 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 33.9490, -117.2217. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 60 km (37 mi) | WSW | earthquakes near Orange County |
| Los Angeles County, CA | 100 km (62 mi) | WNW | earthquakes near Los Angeles County |
| San Diego County, CA | 111 km (69 mi) | SSE | earthquakes near San Diego County |
| Riverside County, CA | 115 km (72 mi) | ESE | earthquakes near Riverside County |
| San Bernardino County, CA | 139 km (86 mi) | NE | earthquakes near San Bernardino County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
42 earthquakes have been recorded within 50 km since this one.
- 1.6 7km NE of Beaumont, CA
- 3.0 7km NE of Beaumont, CA
- 1.6 1km SW of Colton, CA
- 2.5 10km NE of Running Springs, CA
- 1.6 2km SE of Redlands, CA
- 1.7 10km SW of Idyllwild, CA
- 1.8 2km ENE of Colton, CA
- 1.8 4km NNE of Moreno Valley, CA
- 1.6 1km NNW of Loma Linda, CA
- 2.4 2km SE of Redlands, CA
- 1.5 2km SSE of Redlands, CA
- 1.5 2km SE of Redlands, CA
- 1.6 2km SE of Redlands, CA
- 1.9 2km SE of Redlands, CA
- 1.6 3km SE of Redlands, 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.