QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

Earthquake near Avenal, CA

USGS: 4 km S of Avenal, California

96 km (60 mi) SSW of Fresno, CA · 59 km (37 mi) SW of Hanford, CA

2:04 am PST, Dec 11, 2016 · · 15 km deep · released about 98 lb of TNT

10 km30 km60 km120 km N Kings County 31 kmSan Luis Obispo County 70 kmFresno County 98 kmMonterey County 110 kmSan Benito County 112 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
2:04 am PST on 11 December 2016 ()
Where
4 km (3 mi) S of Avenal, CA · earthquakes near Avenal
Magnitude
M 2.3 (md)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Kings County, 31 km ENE
Nearest mapped fault
Great Valley thrust fault system, 15 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 3521 days ago

A magnitude 2.3 earthquake was recorded 4 km (3 mi) S of Avenal, CA, at 2:04 am PST on 11 December 2016 (10:04 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Kettleman City, Huron, Coalinga.

How big was it?

This earthquake released about 98 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 150,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 110,000× the energy of this one
  3. Around the size people start to feel M 3.0 9.8× the energy of this one
  4. This earthquake M 2.3 about 98 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. 6.7 The 1983 Coalinga, California Earthquake · 34 km NNW of this epicentre
  2. 6.5 1922 Parkfield, California Earthquake · 26 km SSW of this epicentre
  3. 6.4 1901 Parkfield, California Earthquake · 33 km W of this epicentre
  4. 6.0 2004 Parkfield, California Earthquake · 27 km SW of this epicentre
  5. 5.8 1934 Parkfield, California Earthquake · 50 km WSW 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 35.9658, -120.1338. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Kings County, CA 31 km (19 mi) ENE earthquakes near Kings County
San Luis Obispo County, CA 70 km (44 mi) SSW earthquakes near San Luis Obispo County
Fresno County, CA 98 km (61 mi) NNE earthquakes near Fresno County
Monterey County, CA 110 km (69 mi) WNW earthquakes near Monterey County
San Benito County, CA 112 km (69 mi) NW earthquakes near San Benito County

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

Aftershocks so far

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

  1. 1.5 14 km SSE of Avenal, California
  2. 1.5 14 km SSE of Avenal, California
  3. 1.7 15 km SSE of Avenal, California
  4. 2.8 15 km SSE of Avenal, California
  5. 1.9 15 km SSW of Kettleman City, California
  6. 2.2 15 km SSE of Avenal, California
  7. 1.8 16km SSE of Avenal, CA
  8. 1.8 Central California
  9. 1.8 15 km SSE of Avenal, California
  10. 1.6 12 km E of Coalinga, California
  11. 1.6 6 km NNE of Avenal, California
  12. 1.8 8 km NE of Avenal, California
  13. 1.5 10 km NE of Avenal, California
  14. 1.8 9 km NNE of Coalinga, California
  15. 1.6 7 km SE of Parkfield, California

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.