QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

Earthquake near Coalinga, CA

USGS: 1 km WNW of Parkfield, California

3:37 pm PDT, Oct 2, 2016 · · 5.7 km deep · released about 1,000 lb of TNT

10 km30 km60 km120 km N San Luis Obispo County 57 kmKings County 60 kmMonterey County 86 kmSan Benito County 97 kmFresno County 119 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
3:37 pm PDT on 2 October 2016 ()
Where
27 km (17 mi) SSW of Coalinga, CA · earthquakes near Coalinga
Magnitude
M 3.0 (ml)
Depth
5.7 km below the surface
Felt
10 reports · strongest reported intensity IV
Nearest
San Luis Obispo County, 57 km S
Nearest mapped fault
San Andreas fault, under 1 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 3.0 earthquake was recorded 27 km (17 mi) SSW of Coalinga, CA, at 3:37 pm PDT on 2 October 2016 (22:37 UTC). 10 people have reported feeling it to USGS. This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

Earthquakes near other towns within 30 km: San Miguel, Shandon.

How big was it?

This earthquake released about 1,000 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 6.7 330,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 15,000× 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 1,000 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 The 1983 Coalinga, California Earthquake · 38 km NNE of this epicentre
  2. 6.5 1922 Parkfield, California Earthquake · 25 km SE of this epicentre
  3. 6.4 1901 Parkfield, California Earthquake · 12 km NNW of this epicentre
  4. 6.0 2004 Parkfield, California Earthquake · 12 km SE of this epicentre
  5. 5.8 1934 Parkfield, California Earthquake · 20 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 35.9045, -120.4508. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Luis Obispo County, CA 57 km (36 mi) S earthquakes near San Luis Obispo County
Kings County, CA 60 km (37 mi) ENE earthquakes near Kings County
Monterey County, CA 86 km (54 mi) WNW earthquakes near Monterey County
San Benito County, CA 97 km (60 mi) NW earthquakes near San Benito County
Fresno County, CA 119 km (74 mi) NE earthquakes near Fresno County

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

Aftershocks so far

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

  1. 1.6 3 km SSE of Avenal, California
  2. 1.5 2 km SE of Avenal, California
  3. 1.6 22 km NW of Parkfield, California
  4. 2.2 20 km NW of Parkfield, California
  5. 2.9 8 km W of Templeton, California
  6. 2.1 8 km W of Templeton, California
  7. 1.7 8 km W of Templeton, California
  8. 4.0 9 km W of Templeton, California
  9. 2.8 1 km SSE of Avenal, California
  10. 1.6 2 km S of Avenal, California
  11. 2.3 4 km S of Avenal, California
  12. 1.6 3 km SSE of Avenal, California
  13. 1.5 2 km S of Avenal, California
  14. 1.6 17 km S of Three Rocks, California
  15. 1.7 3 km ESE of Avenal, 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.