QuakeIndex

Earthquake · reviewed by a seismologist

M 3.2ml

7km NW of Parkfield, CA

· 9.8 km deep · released about 1,700 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Luis Obispo County 62 kmKings County 62 kmMonterey County 81 kmSan Benito County 91 kmFresno County 118 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
Magnitude
M 3.2 (ml)
Depth
9.8 km below the surface
Felt
12 reports · strongest reported intensity III
Nearest
San Luis Obispo County, 62 km S
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1709 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 12 people have reported feeling it to USGS.

How big was it?

This earthquake released about 1,700 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 200,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 8,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 6,200× the energy of this one
  4. This earthquake M 3.2 about 1,700 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.8× more

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.

Where

Epicentre 35.9445, -120.4905. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Luis Obispo County, CA 62 km (39 mi) N of here earthquakes near San Luis Obispo County
Kings County, CA 62 km (39 mi) WSW of here earthquakes near Kings County
Monterey County, CA 81 km (50 mi) ESE of here earthquakes near Monterey County
San Benito County, CA 91 km (57 mi) SE of here earthquakes near San Benito County
Fresno County, CA 118 km (73 mi) SW of here earthquakes near Fresno County

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

Aftershocks so far

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

  1. 2.6 7km WSW of Avenal, CA
  2. 1.6 5km W of Avenal, CA
  3. 2.4 7km WSW of Avenal, CA
  4. 2.3 7km WSW of Avenal, CA
  5. 1.5 9km NNW of Avenal, CA
  6. 1.5 9km NNW of Avenal, CA
  7. 2.2 9km NNW of Avenal, CA
  8. 2.3 19km NNW of Coalinga, CA
  9. 1.7 8km N of Kettleman City, CA
  10. 1.6 9km NW of Avenal, CA
  11. 2.0 12km ENE of Coalinga, CA
  12. 2.8 22km NE of San Lucas, CA
  13. 2.3 5km E of San Ardo, CA
  14. 1.6 22km NW of Parkfield, CA
  15. 1.6 14km SSE of Avenal, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.3 on 2019-12-17 — it released about 48 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.