QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

Earthquake near San Jacinto, CA

No earthquake was likely felt in San Jacinto in the 24 hours to 10:15 pm PST (06:15 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 1.6 earthquake was recorded 5 km (3 mi) northwest of San Jacinto, CA, at 3:21 am PDT on 27 April 2016 (10:21 UTC), 11 km deep.

USGS: 5km NW of San Jacinto, CA

in San Jacinto, CA · 133 km (83 mi) E of Los Angeles, CA

3:21 am PDT, Apr 27, 2016 · · 11 km deep · released about 7.3 lb of TNT

Every earthquake near San Jacinto Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 74 kmSan Diego County 90 kmRiverside County 92 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
3:21 am PDT on 27 April 2016 ()
Where
5 km (3 mi) northwest of San Jacinto, CA · earthquakes near San Jacinto
Magnitude
M 1.6 (ml)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Orange County, 74 km WSW
Nearest mapped fault
San Jacinto fault, 7 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 3850 days ago

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 2 km (1 mi) from the epicentre. In San Jacinto, 5 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: Hemet, East Hemet, Green Acres, Valle Vista, Lakeview, Beaumont.

How big was it?

This earthquake released about 7.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.3 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

The largest earthquake within 50 km since 2016 was M 4.4 on 2016-01-06 — about 16,000 times the energy of this one.

Before 2016, the USGS record lists 20 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.7 The 1918 San Jacinto, California Earthquake · 6 km SSE of this epicentre
  2. 6.3 The 1992 Big Bear, California Earthquake · 46 km NNE of this epicentre
  3. 6.2 3 km SE of San Bernardino, California · 39 km NW of this epicentre
  4. 6.0 The 1910 Lake Elsinore, California Earthquake · 40 km WSW of this epicentre
  5. 6.0 The 1986 North Palm Springs, California Earthquake · 41 km ENE 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 33.8142, -116.9918. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Orange County, CA 74 km (46 mi) WSW earthquakes near Orange County
San Diego County, CA 90 km (56 mi) SSE earthquakes near San Diego County
Riverside County, CA 92 km (57 mi) E earthquakes near Riverside County
Los Angeles County, CA 125 km (77 mi) WNW earthquakes near Los Angeles County
San Bernardino County, CA 138 km (86 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

44 earthquakes have been recorded within 50 km since this one.

  1. 1.8 7km SSE of Home Gardens, CA
  2. 1.5 3km E of Loma Linda, CA
  3. 2.1 4km SSW of Redlands, CA
  4. 2.2 6km ESE of Valle Vista, CA
  5. 2.3 8km NNW of Anza, CA
  6. 1.7 3km WSW of Yucaipa, CA
  7. 1.5 4km SE of Home Gardens, CA
  8. 3.1 6km ENE of Muscoy, CA
  9. 1.8 9km W of Big Bear Lake, CA
  10. 1.5 5km N of Moreno Valley, CA
  11. 1.6 4km ESE of Lake Arrowhead, CA
  12. 2.3 2km E of Nuevo, CA
  13. 1.9 5km SW of Idyllwild, CA
  14. 2.2 12km NE of Yucaipa, CA
  15. 1.8 3km ENE of Cabazon, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.