Earthquake · reviewed by a seismologist
M 1.9ml
Earthquake near Idyllwild, CA
No earthquake was likely felt in Idyllwild in the 24 hours to 1:34 pm PST (21:34 UTC). The last one was M 2.7, 19 km (12 mi) WNW, at 1:04 am PDT on 11 October 2026, estimated intensity II (weak) in town; 58 felt reports to USGS. Every earthquake near Idyllwild
This page: a magnitude 1.9 earthquake was recorded 10 km (6 mi) south-southwest of Idyllwild, CA, at 7:52 am PDT on 20 June 2016 (14:52 UTC), 13 km deep.
USGS: 10km SSW of Idyllwild, CA
100 km (62 mi) NNE of San Diego, CA · 25 km (16 mi) ESE of Hemet, CA
- When
- 7:52 am PDT on 20 June 2016 ()
- Where
- 10 km (6 mi) south-southwest of Idyllwild, CA · earthquakes near Idyllwild
- Magnitude
- M 1.9 (ml)
- Depth
- 13 km below the surface
- Felt
- no reports yet
- Nearest
- Riverside County, 69 km E
- Nearest mapped fault
- San Jacinto fault, 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 3796 days ago
Earthquake alerts for Idyllwild, 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 7 km (4 mi) from the epicentre. In Idyllwild, 10 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: Idyllwild-Pine Cove, Anza, Valle Vista, East Hemet, Hemet, San Jacinto.
How big was it?
This earthquake released about 20 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 5.8 760,000× the energy of this one
- Magna, Utah 2020 M 5.7 540,000× the energy of this one
- Around the size people start to feel M 3.0 48× the energy of this one
- This earthquake M 1.9 about 20 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 5.2 on 2016-06-10 — about 92,000 times the energy of this one.
Before 2016, the USGS record lists 12 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 The 1918 San Jacinto, California Earthquake · 25 km WNW of this epicentre
- 6.0 The 1986 North Palm Springs, California Earthquake · 41 km NNE of this epicentre
- 5.4 20km NNW of Borrego Springs, CA · 36 km SE of this epicentre
- 5.3 4km NNE of Desert Hot Springs, CA · 45 km NNE of this epicentre
- 5.3 6km SSE of Hemet, CA · 19 km WNW 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 33.6490, -116.7418. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Riverside County, CA | 69 km (43 mi) | E | earthquakes near Riverside County |
| San Diego County, CA | 70 km (43 mi) | S | earthquakes near San Diego County |
| Orange County, CA | 96 km (60 mi) | W | earthquakes near Orange County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
43 earthquakes have been recorded within 50 km since this one.
- 2.0 14km ESE of Anza, CA
- 1.7 20km SSW of La Quinta, CA
- 1.6 23km ESE of Anza, CA
- 2.0 5km ENE of Cabazon, CA
- 1.5 9km E of Yucaipa, CA
- 1.7 5km SSW of Idyllwild, CA
- 1.8 5km ENE of Banning, CA
- 1.6 5km S of Idyllwild, CA
- 1.6 14km ESE of Anza, CA
- 1.9 5km NE of Cabazon, CA
- 1.6 9km SE of Valle Vista, CA
- 1.5 18km ESE of Anza, CA
- 1.9 4km WNW of Lake Henshaw, CA
- 1.7 20km ESE of Anza, CA
- 1.7 5km WNW of Desert Hot Springs, 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.