QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

4km WSW of Paso Robles, CA

· 7.6 km deep · released about 58 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Luis Obispo County 35 kmMonterey County 88 kmKings County 96 kmSan Benito County 116 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 2.2 (md)
Depth
7.6 km below the surface
Felt
10 reports · strongest reported intensity III
Nearest
San Luis Obispo County, 35 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1734 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 10 people have reported feeling it to USGS.

How big was it?

This earthquake released about 58 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 260,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 180,000× the energy of this one
  3. Around the size people start to feel M 3.0 16× the energy of this one
  4. This earthquake M 2.2 about 58 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.

Where

Epicentre 35.6128, -120.7200. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Luis Obispo County, CA 35 km (22 mi) NW of here earthquakes near San Luis Obispo County
Monterey County, CA 88 km (55 mi) SE of here earthquakes near Monterey County
Kings County, CA 96 km (60 mi) WSW of here earthquakes near Kings County
San Benito County, CA 116 km (72 mi) SSE of here earthquakes near San Benito County
Santa Barbara County, CA 135 km (84 mi) NNW of here earthquakes near Santa Barbara County

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

Aftershocks so far

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

  1. 1.7 9km WNW of Templeton, CA
  2. 1.5 8km ENE of San Simeon, CA
  3. 1.9 11km N of Cayucos, CA
  4. 1.7 2km ENE of Cayucos, CA
  5. 1.8 7km NNE of San Simeon, CA
  6. 1.7 2km SE of San Ardo, CA
  7. 1.6 12km NE of San Simeon, CA
  8. 1.7 8km NE of San Simeon, CA
  9. 1.6 5km WSW of Paso Robles, CA
  10. 1.7 4km WSW of Paso Robles, CA
  11. 1.6 9km N of Cambria, CA
  12. 1.9 17km NW of Parkfield, CA
  13. 1.9 7km W of Templeton, CA
  14. 2.8 10km NNW of Cholame, CA
  15. 1.7 12km NNE of Cambria, 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 1,400 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.