QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

Earthquake near Chino Hills, CA

No earthquake was likely felt in Chino Hills in the 24 hours to 11:47 pm PST (07:47 UTC). The last one was M 3.2, 16 km (10 mi) E, at 5:37 am PDT on 2 September 2026, estimated intensity III (weak) in town; 730 felt reports to USGS. Every earthquake near Chino Hills

This page: a magnitude 1.7 earthquake was recorded 6 km (4 mi) southwest of Chino Hills, CA, at 5:32 pm PST on 22 November 2016 (01:32 UTC), 16 km deep.

USGS: 6km SW of Chino Hills, CA

in Diamond Bar, CA · 55 km (34 mi) E of Los Angeles, CA

5:32 pm PST, Nov 22, 2016 · · 16 km deep · released about 10 lb of TNT

Every earthquake near Chino Hills Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 32 kmLos Angeles County 49 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
5:32 pm PST on 22 November 2016 ()
Where
6 km (4 mi) southwest of Chino Hills, CA · earthquakes near Chino Hills
Magnitude
M 1.7 (ml)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Orange County, 32 km S
Nearest mapped fault
Elsinore fault, 5 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 3564 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. In Chino Hills, 6 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: Diamond Bar, Yorba Linda, Walnut, Rowland Heights, Brea, Los Serranos.

How big was it?

This earthquake released about 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 92× the energy of this one
  4. This earthquake M 1.7 about 10 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 17 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.4 The 1933 Long Beach, California Earthquake · 40 km SSW of this epicentre
  2. 6.0 The 1910 Lake Elsinore, California Earthquake · 48 km SE of this epicentre
  3. 5.9 The 1987 Whittier Narrows, California Earthquake · 27 km WNW of this epicentre
  4. 5.8 The 1991 Sierra Madre, California Earthquake · 38 km NNW of this epicentre
  5. 5.5 The 1990 Upland, California Earthquake · 23 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 33.9608, -117.8142. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Orange County, CA 32 km (20 mi) S earthquakes near Orange County
Los Angeles County, CA 49 km (30 mi) WNW earthquakes near Los Angeles County
San Diego County, CA 142 km (88 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

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

  1. 2.1 2km SE of Brea, CA
  2. 1.5 3km NE of Fontana, CA
  3. 2.1 6km N of Lytle Creek, CA
  4. 1.5 2km NNE of Colton, CA
  5. 1.6 3km NNE of Colton, CA
  6. 2.3 6km WNW of Lytle Creek, CA
  7. 1.7 10km WNW of Corona, CA
  8. 3.0 5km SE of Lytle Creek, CA
  9. 1.6 2km WSW of Lakewood, CA
  10. 1.6 2km SE of Hawthorne, CA
  11. 1.6 4km SE of Home Gardens, CA
  12. 1.8 8km N of Rancho Cucamonga, CA
  13. 1.9 2km NW of Willowbrook, CA
  14. 2.5 6km NNE of Lytle Creek, CA
  15. 1.9 1km SE of Fontana, 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.