QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

Earthquake near Huntington Park, CA

No earthquake was likely felt in Huntington Park in the 24 hours to 3:57 am PST (11:57 UTC). The last one was M 3.2, 22 km (14 mi) S, at 12:44 am PDT on 9 October 2026, estimated intensity II (weak) in town; 1,090 felt reports to USGS. Every earthquake near Huntington Park

This page: a magnitude 3.0 earthquake was recorded in Huntington Park, CA, at 5:52 am PDT on 1 April 2021 (12:52 UTC), 13 km deep. 619 people have reported feeling it to USGS.

USGS: 1km ENE of Huntington Park, CA

19 km (12 mi) ESE of Los Angeles, CA · in Huntington Park, CA

5:52 am PDT, Apr 1, 2021 · · 13 km deep · released about 800 lb of TNT

Every earthquake near Huntington Park Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 24 kmOrange County 53 kmVentura County 94 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
5:52 am PDT on 1 April 2021 ()
Where
in Huntington Park, CA · earthquakes near Huntington Park
Magnitude
M 3.0 (ml)
Depth
13 km below the surface
Felt
619 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
Los Angeles County, 24 km N
Nearest mapped fault
Puente Hills blind thrust system, 1 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 1985 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 32 km (20 mi) from the epicentre. 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: Huntington Park in town, intensity III · Bell 3 km, intensity III · Maywood 3 km, intensity III · South Gate 3 km, intensity III · Florence-Graham 3 km, intensity III · East Los Angeles 6 km, intensity III · Lynwood 6 km, intensity III · Bell Gardens 6 km, intensity III. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 800 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 420,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 19,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 13,000× the energy of this one
  4. This earthquake M 3.0 about 800 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 240 times the energy of this one.

Before 2016, the USGS record lists 18 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.7 Northridge, California, earthquake · 39 km NW of this epicentre
  2. 6.4 The 1933 Long Beach, California Earthquake · 44 km SSE of this epicentre
  3. 5.9 The 1987 Whittier Narrows, California Earthquake · 15 km NE of this epicentre
  4. 5.9 1km ENE of Granada Hills, California · 41 km NW of this epicentre
  5. 5.8 The 1991 Sierra Madre, California Earthquake · 38 km NNE 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 33.9842, -118.2137. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Los Angeles County, CA 24 km (15 mi) N earthquakes near Los Angeles County
Orange County, CA 53 km (33 mi) SE earthquakes near Orange County
Ventura County, CA 94 km (59 mi) WNW earthquakes near Ventura County

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

Aftershocks so far

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

  1. 1.9 6km WSW of Malibu Beach, CA
  2. 2.4 2km E of Commerce, CA
  3. 1.5 1km SE of Marina del Rey, CA
  4. 1.8 11km E of Yorba Linda, CA
  5. 1.5 18km S of Malibu Beach, CA
  6. 1.7 16km S of Malibu Beach, CA
  7. 1.9 3km WNW of Lennox, CA
  8. 2.2 1km NNW of Lennox, CA
  9. 1.6 1km SE of Lennox, CA
  10. 2.1 1km SSW of Inglewood, CA
  11. 2.3 1km NE of Lennox, CA
  12. 1.6 2km NW of Lennox, CA
  13. 1.6 2km WSW of Inglewood, CA
  14. 2.3 0km ENE of Lennox, CA
  15. 1.7 0km W of Lennox, 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.