QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

Earthquake near Los Angeles, CA

No earthquake was likely felt in Los Angeles in the 24 hours to 3:43 am PST (11:43 UTC). The last one was M 3.2, 30 km (19 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 Los Angeles

This page: a magnitude 2.1 earthquake was recorded 17 km (10 mi) west-southwest of Los Angeles, CA, at 11:10 pm PDT on 28 March 2017 (06:10 UTC), 10 km deep. 39 people have reported feeling it to USGS.

USGS: 4km SW of Baldwin Hills, CA

in Los Angeles, CA

11:10 pm PDT, Mar 28, 2017 · · 10 km deep · released about 38 lb of TNT

Every earthquake near Los Angeles Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 27 kmOrange County 67 kmVentura County 79 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
11:10 pm PDT on 28 March 2017 ()
Where
17 km (10 mi) west-southwest of Los Angeles, CA · earthquakes near Los Angeles
Magnitude
M 2.1 (ml)
Depth
10 km below the surface
Felt
39 reports · strongest reported intensity IV
Nearest
Los Angeles County, 27 km NNE
Nearest mapped fault
Newport-Inglewood-Rose Canyon fault, 6 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 3467 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 13 km (8 mi) from the epicentre. In Los Angeles, 17 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: Inglewood 5 km, intensity II · Hawthorne 9 km, intensity II · Santa Monica 9 km, intensity II · Westmont 10 km, intensity II · Manhattan Beach 11 km, intensity II · Lawndale 11 km, intensity II · Gardena 13 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 38 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 5.8 390,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 280,000× the energy of this one
  3. Around the size people start to feel M 3.0 25× the energy of this one
  4. This earthquake M 2.1 about 38 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 23 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.7 Northridge, California, earthquake · 29 km NNW of this epicentre
  2. 6.6 1971 San Fernando Earthquake, California · 48 km N of this epicentre
  3. 5.9 The 1987 Whittier Narrows, California Earthquake · 31 km ENE of this epicentre
  4. 5.9 1km ENE of Granada Hills, California · 34 km NNW of this epicentre
  5. 5.8 10km SSW of Agua Dulce, CA · 48 km N 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 33.9815, -118.4023. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Los Angeles County, CA 27 km (17 mi) NNE earthquakes near Los Angeles County
Orange County, CA 67 km (42 mi) ESE earthquakes near Orange County
Ventura County, CA 79 km (49 mi) WNW earthquakes near Ventura County

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

Aftershocks so far

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

  1. 1.9 5km NW of Westwood, CA
  2. 3.6 5km NW of Westwood, CA
  3. 2.0 17km SSE of Malibu, CA
  4. 1.7 15km SW of Rancho Palos Verdes, CA
  5. 1.5 6km SSE of Malibu, CA
  6. 1.5 2km NW of Lennox, CA
  7. 1.8 17km SSE of Malibu, CA
  8. 1.7 6km SW of Signal Hill, CA
  9. 1.6 6km S of MacArthur Park, CA
  10. 1.6 4km S of Hollywood, CA
  11. 1.8 4km WSW of Huntington Beach, CA
  12. 1.8 0km WNW of View Park-Windsor Hills, CA
  13. 1.6 3km NNW of Baldwin Park, CA
  14. 2.0 1km SSW of Sherman Oaks, CA
  15. 2.0 6km NE of Altadena, 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.