Earthquake · reviewed by a seismologist
M 1.7ml
Earthquake near San Jacinto, CA
No earthquake was likely felt in San Jacinto in the 24 hours to 3:37 am PST (11:37 UTC). The last one was M 2.2, 3 km (2 mi) N, at 8:52 pm PDT on 14 October 2026, estimated intensity II (weak) in town; 3 felt reports to USGS. Every earthquake near San Jacinto
This page: a magnitude 1.7 earthquake was recorded 3 km (2 mi) northeast of San Jacinto, CA, at 1:35 am PDT on 24 March 2020 (08:35 UTC), 12 km deep.
USGS: 3km NE of San Jacinto, CA
5 km (3 mi) E of San Jacinto, CA · 138 km (86 mi) E of Los Angeles, CA
- When
- 1:35 am PDT on 24 March 2020 ()
- Where
- 3 km (2 mi) northeast of San Jacinto, CA · earthquakes near San Jacinto
- Magnitude
- M 1.7 (ml)
- Depth
- 12 km below the surface
- Felt
- no reports yet
- Nearest
- Orange County, 79 km W
- Nearest mapped fault
- San Jacinto 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 2424 days ago
Earthquake alerts for San Jacinto, CA
Get a notification in this browser when USGS records an earthquake near San Jacinto, CA. No account or email needed.
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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 4 km (2 mi) from the epicentre. In San Jacinto, 3 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: San Jacinto 3 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 11 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 1,300,000× the energy of this one
- Magna, Utah 2020 M 5.7 930,000× the energy of this one
- Around the size people start to feel M 3.0 83× the energy of this one
- This earthquake M 1.7 about 11 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 4.5 on 2018-05-08 — about 14,000 times the energy of this one.
Before 2016, the USGS record lists 20 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 The 1918 San Jacinto, California Earthquake · 5 km SSW of this epicentre
- 6.3 The 1992 Big Bear, California Earthquake · 46 km NNE of this epicentre
- 6.2 3 km SE of San Bernardino, California · 43 km NW of this epicentre
- 6.0 The 1910 Lake Elsinore, California Earthquake · 44 km WSW of this epicentre
- 6.0 The 1986 North Palm Springs, California Earthquake · 38 km NE 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 33.8028, -116.9398. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 79 km (49 mi) | W | earthquakes near Orange County |
| Riverside County, CA | 87 km (54 mi) | E | earthquakes near Riverside County |
| San Diego County, CA | 88 km (55 mi) | S | earthquakes near San Diego County |
| San Bernardino County, CA | 136 km (85 mi) | NNE | earthquakes near San Bernardino County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
5 earthquakes have been recorded within 50 km since this one.
- 1.7 6km SW of Idyllwild, CA
- 2.4 7km ENE of Yucaipa, CA
- 1.8 13km W of Anza, CA
- 1.7 8km SSW of Idyllwild, CA
- 2.1 5km N of Murrieta, 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.