QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

Earthquake near Alhambra, CA

No earthquake was likely felt in Alhambra in the 24 hours to 11:41 pm PST (07:41 UTC). The last one was M 3.2, 35 km (22 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 Alhambra

This page: a magnitude 1.7 earthquake was recorded in Alhambra, CA, at 5:05 pm PDT on 11 June 2017 (00:05 UTC), 9.2 km deep.

USGS: 1km E of Alhambra, CA

28 km (18 mi) ENE of Los Angeles, CA · in Alhambra, CA

5:05 pm PDT, Jun 11, 2017 · · 9.2 km deep · released about 10 lb of TNT

Every earthquake near Alhambra Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 18 kmOrange County 56 kmVentura County 98 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
5:05 pm PDT on 11 June 2017 ()
Where
in Alhambra, CA · earthquakes near Alhambra
Magnitude
M 1.7 (ml)
Depth
9.2 km below the surface
Felt
no reports yet
Nearest
Los Angeles County, 18 km NW
Nearest mapped fault
Raymond fault, 3 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 3432 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 8 km (5 mi) from the epicentre. 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: Alhambra in town, intensity II · San Gabriel in town, intensity II · Monterey Park 4 km, intensity II · South Pasadena 4 km, intensity II · Rosemead 4 km, intensity II · Temple City 6 km, intensity II · Pasadena 7 km, intensity II · South El Monte 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 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 20 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.7 Northridge, California, earthquake · 41 km WNW of this epicentre
  2. 6.6 1971 San Fernando Earthquake, California · 43 km NNW of this epicentre
  3. 5.9 The 1987 Whittier Narrows, California Earthquake · 5 km SE of this epicentre
  4. 5.9 1km ENE of Granada Hills, California · 40 km WNW of this epicentre
  5. 5.8 10km SSW of Agua Dulce, CA · 43 km NNW 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 34.0938, -118.1167. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Los Angeles County, CA 18 km (11 mi) NW earthquakes near Los Angeles County
Orange County, CA 56 km (35 mi) SE earthquakes near Orange County
Ventura County, CA 98 km (61 mi) WNW earthquakes near Ventura County

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

Aftershocks so far

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

  1. 1.6 4km N of Gardena, CA
  2. 1.8 3km WSW of East Los Angeles, CA
  3. 1.7 5km NE of Yorba Linda, CA
  4. 2.4 4km SSW of Yorba Linda, CA
  5. 1.6 7km WSW of Huntington Beach, CA
  6. 2.1 4km SSW of Yorba Linda, CA
  7. 1.6 4km ESE of Placentia, CA
  8. 1.6 4km SSW of Yorba Linda, CA
  9. 2.4 4km SSW of Yorba Linda, CA
  10. 1.7 2km NE of La Canada Flintridge, CA
  11. 1.5 1km NNW of Florence-Graham, CA
  12. 2.3 6km ENE of Glendora, CA
  13. 1.9 3km SE of Chatsworth, CA
  14. 2.0 8km N of La Verne, CA
  15. 2.5 8km SSE of San Pedro, 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.