QuakeIndex

Earthquake · automatic estimate, may change

M 2.1ml

Earthquake near Glen Avon, CA

Yes: an earthquake was likely felt in Glen Avon in the last 24 hours. M 1.6, 4 km (2 mi) WNW of Glen Avon, at 6:22 am PST on 12 November 2026 (14:22 UTC); the estimated shaking in Glen Avon was intensity II (weak). Every earthquake near Glen Avon

This page: a magnitude 2.1 earthquake was recorded 3 km (2 mi) northwest of Glen Avon, CA, at 8:43 pm PDT on 10 July 2019 (03:43 UTC), 2.5 km deep. 12 people have reported feeling it to USGS. The magnitude and location are an automatic first estimate and may change.

USGS: 3km NW of Glen Avon, CA

in Jurupa Valley, CA · 83 km (52 mi) E of Los Angeles, CA

8:43 pm PDT, Jul 10, 2019 · · 2.5 km deep · released about 47 lb of TNT

Every earthquake near Glen Avon Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 46 kmLos Angeles County 72 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
8:43 pm PDT on 10 July 2019 ()
Where
3 km (2 mi) northwest of Glen Avon, CA · earthquakes near Glen Avon
Magnitude
M 2.1 (ml)
Depth
2.5 km below the surface
Felt
12 reports · strongest reported intensity III
Nearest
Orange County, 46 km SSW
Nearest mapped fault
Red Hill-Etiwanda Avenue fault, 13 km from its surface trace — near is not the same as on
Status
Automatic — a machine’s first estimate, which may change

USGS · last changed by USGS · we first saw it 2681 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 17 km (11 mi) from the epicentre. In Glen Avon, 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: Pedley 7 km, intensity II · Eastvale 9 km, intensity II · Fontana 10 km, intensity II · Rubidoux 10 km, intensity II · Norco 11 km, intensity II · Rancho Cucamonga 12 km, intensity II · Riverside 13 km, intensity II · Ontario 14 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 47 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 320,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 20× the energy of this one
  4. This earthquake M 2.1 about 47 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 2018-08-29 — about 2,400 times the energy of this one.

Before 2016, the USGS record lists 11 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.2 3 km SE of San Bernardino, California · 24 km ENE of this epicentre
  2. 6.0 The 1910 Lake Elsinore, California Earthquake · 38 km SSE of this epicentre
  3. 5.6 7km ENE of Running Springs, CA · 49 km ENE of this epicentre
  4. 5.5 The 1990 Upland, California Earthquake · 22 km NW of this epicentre
  5. 5.4 5km S of Chino Hills, CA · 25 km WSW 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 34.0275, -117.5078. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Orange County, CA 46 km (29 mi) SSW earthquakes near Orange County
Los Angeles County, CA 72 km (45 mi) WNW earthquakes near Los Angeles County
San Diego County, CA 131 km (81 mi) SSE earthquakes near San Diego County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 3.2 2km NE of Lakeland Village, CA
  2. 1.9 6km WNW of Mira Loma, CA
  3. 1.6 3km NNW of Mira Loma, CA
  4. 1.8 3km NNW of Mira Loma, CA
  5. 2.0 4km NNW of Mira Loma, CA
  6. 1.8 3km NNW of Mira Loma, CA
  7. 1.6 3km NNW of Mira Loma, CA
  8. 2.2 6km SSE of Mentone, CA
  9. 3.0 6km SSE of Mentone, CA
  10. 1.9 3km W of Rancho Cucamonga, CA
  11. 1.6 3km NNW of Mira Loma, CA
  12. 2.0 3km NNW of Mira Loma, CA
  13. 2.0 4km NNW of Mira Loma, CA
  14. 1.6 4km NNW of Mira Loma, CA
  15. 1.6 6km SSE of Mentone, 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.