QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

Earthquake near Piñon Hills, CA

No earthquake was likely felt in Piñon Hills in the 24 hours to 5:10 am PST (13:10 UTC). The last one was M 1.7, 6 km (4 mi) SSW, at 6:36 pm PDT on 22 October 2026, estimated intensity II (weak) in town. Every earthquake near Piñon Hills

This page: a magnitude 3.0 earthquake was recorded 4 km (2 mi) southwest of Piñon Hills, CA, at 10:43 am PDT on 10 July 2017 (17:43 UTC), 3.8 km deep. 26 people have reported feeling it to USGS.

USGS: 4km SW of Pinon Hills, CA

80 km (50 mi) ENE of Los Angeles, CA · 32 km (20 mi) WSW of Victorville, CA

10:43 am PDT, Jul 10, 2017 · · 3.8 km deep · released about 1,100 lb of TNT

Every earthquake near Piñon Hills Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 59 kmOrange County 83 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
10:43 am PDT on 10 July 2017 ()
Where
4 km (2 mi) southwest of Piñon Hills, CA · earthquakes near Piñon Hills
Magnitude
M 3.0 (ml)
Depth
3.8 km below the surface
Felt
26 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
Los Angeles County, 59 km WSW
Nearest mapped fault
San Andreas fault, 7 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 3324 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 38 km (24 mi) from the epicentre. In Piñon Hills, 4 km away, the estimate is intensity III (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: Wrightwood 7 km, intensity III · Phelan 10 km, intensity III · Hesperia 35 km, intensity II · Rancho Cucamonga 35 km, intensity II · Upland 35 km, intensity II · Glendora 35 km, intensity II · Claremont 36 km, intensity II · La Verne 36 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1,100 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 6.7 320,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 14,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 10,000× the energy of this one
  4. This earthquake M 3.0 about 1,100 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 3 earthquakes of M5 or more within 50 km:

  1. 5.8 The 1991 Sierra Madre, California Earthquake · 33 km WSW of this epicentre
  2. 5.5 The 1990 Upland, California Earthquake · 30 km S of this epicentre
  3. 5.2 3km W of Lytle Creek, CA · 22 km SE 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 34.4145, -117.6792. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Los Angeles County, CA 59 km (37 mi) WSW earthquakes near Los Angeles County
Orange County, CA 83 km (51 mi) S earthquakes near Orange County
Kern County, CA 141 km (88 mi) NW earthquakes near Kern County

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

Aftershocks so far

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

  1. 1.6 9km ENE of Adelanto, CA
  2. 1.8 5km S of Lytle Creek, CA
  3. 1.7 5km WNW of Devore, CA
  4. 2.3 6km ENE of Glendora, CA
  5. 2.0 8km N of La Verne, CA
  6. 2.3 5km S of Lytle Creek, CA
  7. 2.2 2km N of Colton, CA
  8. 2.3 5km E of Vincent, CA
  9. 1.6 6km N of Fontana, CA
  10. 1.9 8km SW of Lytle Creek, CA
  11. 1.7 7km NNE of Lake Arrowhead, CA
  12. 1.6 3km NNW of Baldwin Park, CA
  13. 1.5 6km E of Palmdale, CA
  14. 2.0 6km NE of Altadena, CA
  15. 2.0 2km W of Devore, 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.