QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

Earthquake near Baldwin Park, CA

No earthquake was likely felt in Baldwin Park in the 24 hours to 9:10 pm PST (05:10 UTC). The last one was M 3.2, 39 km (24 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 Baldwin Park

This page: a magnitude 1.9 earthquake was recorded 3 km (2 mi) north-northwest of Baldwin Park, CA, at 5:08 pm PDT on 11 October 2016 (00:08 UTC), 11 km deep.

USGS: 3km NNW of Baldwin Park, CA

in Baldwin Park, CA · 42 km (26 mi) ENE of Los Angeles, CA

5:08 pm PDT, Oct 11, 2016 · · 11 km deep · released about 22 lb of TNT

Every earthquake near Baldwin Park Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 29 kmOrange County 51 kmVentura County 111 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
5:08 pm PDT on 11 October 2016 ()
Where
3 km (2 mi) north-northwest of Baldwin Park, CA · earthquakes near Baldwin Park
Magnitude
M 1.9 (ml)
Depth
11 km below the surface
Felt
no reports yet
Nearest
Los Angeles County, 29 km WNW
Nearest mapped fault
Sierra Madre fault, 4 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 3683 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 10 km (6 mi) from the epicentre. In Baldwin Park, 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: Baldwin Park 3 km, intensity II · West Covina 5 km, intensity II · Monrovia 5 km, intensity II · Azusa 6 km, intensity II · El Monte 7 km, intensity II · Arcadia 7 km, intensity II · Covina 8 km, intensity II · Temple City 8 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 22 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 680,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 480,000× the energy of this one
  3. Around the size people start to feel M 3.0 43× the energy of this one
  4. This earthquake M 1.9 about 22 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 12 earthquakes of M5 or more within 50 km; the five largest:

  1. 5.9 The 1987 Whittier Narrows, California Earthquake · 11 km WSW of this epicentre
  2. 5.8 The 1991 Sierra Madre, California Earthquake · 18 km N of this epicentre
  3. 5.5 The 1990 Upland, California Earthquake · 25 km E of this epicentre
  4. 5.4 5km S of Chino Hills, CA · 26 km SE of this epicentre
  5. 5.2 3km W of Lytle Creek, CA · 43 km ENE 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 34.1075, -117.9697. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Los Angeles County, CA 29 km (18 mi) WNW earthquakes near Los Angeles County
Orange County, CA 51 km (32 mi) SSE earthquakes near Orange County
Ventura County, CA 111 km (69 mi) WNW earthquakes near Ventura 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. 2.7 1km E of Brea, CA
  2. 1.9 1km ENE of Brea, CA
  3. 2.2 5km ESE of Rancho Cucamonga, CA
  4. 1.9 7km S of Pearblossum, CA
  5. 1.8 6km S of Phelan, CA
  6. 1.8 4km ESE of Marina del Rey, CA
  7. 1.6 4km NNE of Fontana, CA
  8. 1.7 4km NW of Lake View Terrace, CA
  9. 1.5 7km S of Pearblossum, CA
  10. 1.8 2km W of Pasadena, CA
  11. 2.4 9km E of Yorba Linda, CA
  12. 1.5 5km NNW of Fontana, CA
  13. 1.6 2km SSE of Duarte, CA
  14. 1.5 3km NNE of Fontana, CA
  15. 1.9 6km ESE of Ontario, 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.