QuakeIndex

Earthquake · automatic estimate, may change

M 1.0ml

Earthquake near South El Monte, CA

No earthquake was likely felt in South El Monte in the 24 hours to 1:47 am PST (09:47 UTC). The last one was M 3.2, 32 km (20 mi) SSW, at 12:44 am PDT on 9 October 2026, estimated intensity II (weak) in town; 1,090 felt reports to USGS. Every earthquake near South El Monte

This page: a magnitude 1.0 earthquake was recorded 3 km (2 mi) southeast of South El Monte, CA, at 3:21 am PDT on 30 October 2026 (10:21 UTC), 9.2 km deep. The magnitude and location are an automatic first estimate and may change.

USGS: 3 km SE of South El Monte, CA

in El Monte, CA · 35 km (22 mi) E of Los Angeles, CA

3:21 am PDT, Oct 30, 2026 · · 9.2 km deep · released about 1.1 lb of TNT

Every earthquake near South El Monte Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 28 kmOrange County 46 kmVentura County 108 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 30 October 2026 ()
Where
3 km (2 mi) southeast of South El Monte, CA · earthquakes near South El Monte
Magnitude
M 1.0 (ml)
Depth
9.2 km below the surface
Felt
no reports yet
Nearest
Los Angeles County, 28 km NW
Nearest mapped fault
Puente Hills blind thrust system, 11 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 13 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. 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: Avocado Heights, El Monte, West Puente Valley, Whittier, South San Gabriel, Rosemead.

How big was it?

This earthquake released about 1.1 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 14,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 9,800,000× the energy of this one
  3. Around the size people start to feel M 3.0 880× the energy of this one
  4. This earthquake M 1.0 about 1.1 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 2020-09-19 — about 180,000 times the energy of this one.

Before 2016, the USGS record lists 14 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.4 The 1933 Long Beach, California Earthquake · 45 km S of this epicentre
  2. 5.9 The 1987 Whittier Narrows, California Earthquake · 5 km WNW of this epicentre
  3. 5.8 The 1991 Sierra Madre, California Earthquake · 26 km N of this epicentre
  4. 5.5 The 1990 Upland, California Earthquake · 33 km ENE of this epicentre
  5. 5.4 5km S of Chino Hills, CA · 26 km ESE 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 34.0343, -118.0288. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Los Angeles County, CA 28 km (17 mi) NW earthquakes near Los Angeles County
Orange County, CA 46 km (29 mi) SSE earthquakes near Orange County
Ventura County, CA 108 km (67 mi) WNW earthquakes near Ventura County
San Diego County, CA 162 km (100 mi) SE earthquakes near San Diego County

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

Aftershocks so far

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

  1. 1.1 1 km SSE of Yorba Linda, CA
  2. 1.3 3 km SW of Yorba Linda, CA
  3. 1.6 1 km ESE of Baldwin Hills, CA
  4. 1.7 2 km E of Granada Hills, CA
  5. 0.6 3 km SSW of Charter Oak, CA
  6. 1.5 3 km WNW of Signal Hill, CA
  7. 1.0 3 km ENE of Rancho Cucamonga, CA
  8. 0.8 10 km N of Azusa, CA
  9. 1.1 2 km NW of Universal City, CA
  10. 0.5 2 km ENE of South El Monte, CA
  11. 1.1 3 km NE of Ontario, CA
  12. 1.3 3 km WNW of La Mirada, CA
  13. 0.4 5 km WSW of Lytle Creek, CA
  14. 1.1 6 km NNW of Azusa, CA
  15. 1.2 6 km WNW of Mira Loma, 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.