QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

Earthquake near Duarte, CA

No earthquake was likely felt in Duarte in the 24 hours to 3:36 am PST (11:36 UTC). The last one was M 3.8, 78 km (48 mi) WNW, at 8:00 pm PDT on 29 September 2026, estimated intensity II (weak) in town; 199 felt reports to USGS. Every earthquake near Duarte

This page: a magnitude 1.6 earthquake was recorded in Duarte, CA, at 4:32 pm PST on 8 January 2017 (00:32 UTC), 8.9 km deep.

USGS: 2km SSE of Duarte, CA

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

4:32 pm PST, Jan 8, 2017 · · 8.9 km deep · released about 6.4 lb of TNT

Every earthquake near Duarte Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 28 kmOrange County 53 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
4:32 pm PST on 8 January 2017 ()
Where
in Duarte, CA · earthquakes near Duarte
Magnitude
M 1.6 (ml)
Depth
8.9 km below the surface
Felt
no reports yet
Nearest
Los Angeles County, 28 km WNW
Nearest mapped fault
Sierra Madre 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 3564 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 6 km (4 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: Monrovia 4 km, intensity II · Baldwin Park 4 km, intensity II · Azusa 6 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 6.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.6 about 6.4 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 16 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.6 1971 San Fernando Earthquake, California · 49 km NW of this epicentre
  2. 5.9 The 1987 Whittier Narrows, California Earthquake · 12 km SW of this epicentre
  3. 5.8 10km SSW of Agua Dulce, CA · 49 km NW of this epicentre
  4. 5.8 10km SSW of Agua Dulce, CA · 49 km NW of this epicentre
  5. 5.8 The 1991 Sierra Madre, California Earthquake · 16 km N 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 34.1248, -117.9702. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Los Angeles County, CA 28 km (17 mi) WNW earthquakes near Los Angeles County
Orange County, CA 53 km (33 mi) SSE earthquakes near Orange County
Ventura County, CA 110 km (68 mi) WNW earthquakes near Ventura County

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

Aftershocks so far

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

  1. 1.5 6 km SSE of Lytle Creek, California
  2. 2.0 8 km ENE of San Antonio Heights, California
  3. 2.0 5 km NW of Fontana, California
  4. 1.6 4 km SSE of Placentia, California
  5. 1.8 10 km ENE of Villa Park, California
  6. 2.4 4 km SSE of Lytle Creek, California
  7. 2.7 9 km SW of Corona, California
  8. 1.8 1 km NNW of North Hills, California
  9. 1.7 2 km N of East La Mirada, California
  10. 1.9 2 km N of East La Mirada, California
  11. 1.6 3 km SE of Sunset Beach, California
  12. 1.9 2km SW of MacArthur Park, CA
  13. 2.1 2km SE of Brea, CA
  14. 1.5 3km NE of Fontana, CA
  15. 1.7 2km S of Sherman Oaks, 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.