QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

Earthquake near Baldwin Park, CA

No earthquake was likely felt in Baldwin Park in the 24 hours to 10:18 pm PST (06:18 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 1.6 earthquake was recorded 3 km (2 mi) north-northwest of Baldwin Park, CA, at 12:22 am PDT on 24 August 2017 (07:22 UTC), 12 km deep.

USGS: 3km NNW of Baldwin Park, CA

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

12:22 am PDT, Aug 24, 2017 · · 12 km deep · released about 8.1 lb of TNT

Every earthquake near Baldwin Park Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 28 kmOrange County 51 kmVentura County 110 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
12:22 am PDT on 24 August 2017 ()
Where
3 km (2 mi) north-northwest of Baldwin Park, CA · earthquakes near Baldwin Park
Magnitude
M 1.6 (ml)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Los Angeles County, 28 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 3303 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 1 km (1 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.

Earthquakes near other towns within 30 km: Irwindale, Duarte, Mayflower Village, Bradbury, North El Monte, Monrovia.

How big was it?

This earthquake released about 8.1 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
  3. Around the size people start to feel M 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 8.1 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

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 · 26 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 34.1092, -117.9710. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Los Angeles County, CA 28 km (18 mi) WNW earthquakes near Los Angeles County
Orange County, CA 51 km (32 mi) SSE earthquakes near Orange County
Ventura County, CA 110 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

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

  1. 3.1 4km SE of Ontario, CA
  2. 2.2 9km SW of Lytle Creek, CA
  3. 1.5 3km WSW of Rancho Cucamonga, CA
  4. 2.2 3km NNW of Glen Avon, CA
  5. 1.5 8km SSW of Lytle Creek, CA
  6. 1.7 4km NW of Corona, CA
  7. 1.5 2km SSW of Mira Loma, CA
  8. 1.9 2km NE of Villa Park, CA
  9. 1.9 3km NNW of Beverly Hills, CA
  10. 1.6 8km ESE of Yorba Linda, CA
  11. 1.5 5km ENE of Rancho Cucamonga, CA
  12. 3.1 5km WNW of Willowbrook, CA
  13. 2.1 5km WNW of Willowbrook, CA
  14. 1.6 4km N of Gardena, CA
  15. 1.8 3km WSW of East Los Angeles, 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.