QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

Earthquake near Lake Elsinore, CA

No earthquake was likely felt in Lake Elsinore in the 24 hours to 6:06 pm PST (02:06 UTC). The last one was M 3.2, 45 km (28 mi) NNW, at 5:37 am PDT on 2 September 2026, estimated intensity II (weak) in town; 730 felt reports to USGS. Every earthquake near Lake Elsinore

This page: a magnitude 1.7 earthquake was recorded 4 km (3 mi) north-northwest of Lake Elsinore, CA, at 7:00 pm PDT on 29 August 2017 (02:00 UTC), 10 km deep.

USGS: 4km NNW of Lake Elsinore, CA

in Lake Elsinore, CA · 104 km (65 mi) ESE of Los Angeles, CA

7:00 pm PDT, Aug 29, 2017 · · 10 km deep · released about 12 lb of TNT

Every earthquake near Lake Elsinore Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 40 kmSan Diego County 92 kmLos Angeles County 101 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
7:00 pm PDT on 29 August 2017 ()
Where
4 km (3 mi) north-northwest of Lake Elsinore, CA · earthquakes near Lake Elsinore
Magnitude
M 1.7 (ml)
Depth
10 km below the surface
Felt
no reports yet
Nearest
Orange County, 40 km W
Nearest mapped fault
Elsinore fault, 2 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 3304 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 8 km (5 mi) from the epicentre. In Lake Elsinore, 4 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: Lake Elsinore 4 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 12 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.

  1. Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 870,000× the energy of this one
  3. Around the size people start to feel M 3.0 78× the energy of this one
  4. This earthquake M 1.7 about 12 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 9 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.7 The 1918 San Jacinto, California Earthquake · 36 km ENE of this epicentre
  2. 6.2 3 km SE of San Bernardino, California · 44 km N of this epicentre
  3. 6.0 The 1910 Lake Elsinore, California Earthquake · 5 km W of this epicentre
  4. 5.4 5km S of Chino Hills, CA · 47 km NW of this epicentre
  5. 5.3 6km SSE of Hemet, CA · 38 km E 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 33.6993, -117.3500. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Orange County, CA 40 km (25 mi) W earthquakes near Orange County
San Diego County, CA 92 km (57 mi) SE earthquakes near San Diego County
Los Angeles County, CA 101 km (63 mi) WNW earthquakes near Los Angeles 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. 1.6 5km SSW of Redlands, CA
  2. 2.1 2km SE of Loma Linda, CA
  3. 2.6 3km SE of Loma Linda, CA
  4. 1.6 2km ESE of Loma Linda, CA
  5. 2.1 1km NW of Loma Linda, CA
  6. 1.6 5km ENE of Calimesa, CA
  7. 1.6 4km SE of Home Gardens, CA
  8. 1.6 6km NNW of Lake Elsinore, CA
  9. 1.6 4km WNW of Aguanga, CA
  10. 1.9 6km N of Valle Vista, CA
  11. 3.0 2km ESE of Loma Linda, CA
  12. 1.6 2km ESE of Loma Linda, CA
  13. 1.6 8km WSW of Calimesa, CA
  14. 1.7 3km N of Beaumont, CA
  15. 2.1 2km SE of Colton, 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.