QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4md

Earthquake near Cambria, CA

No earthquake was likely felt in Cambria in the 24 hours to 6:34 am PST (14:34 UTC). The last one was M 2.3, 18 km (11 mi) NNE, at 5:04 pm PDT on 21 September 2026, estimated intensity II (weak) in town. Every earthquake near Cambria

This page: a magnitude 2.4 earthquake was recorded 47 km (29 mi) west-northwest of Cambria, CA, at 5:10 am PDT on 7 July 2023 (12:10 UTC), 2.5 km deep. 1 person has reported feeling it to USGS.

USGS: 27 km S of Lopez Point, CA

5:10 am PDT, Jul 7, 2023 · · 2.5 km deep · released about 140 lb of TNT

Every earthquake near Cambria Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Monterey County 55 kmSan Benito County 101 kmSan Luis Obispo County 107 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
5:10 am PDT on 7 July 2023 ()
Where
47 km (29 mi) west-northwest of Cambria, CA · earthquakes near Cambria
Magnitude
M 2.4 (md)
Depth
2.5 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
Monterey County, 55 km NNE
Nearest mapped fault
San Gregorio fault, 10 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 1213 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 21 km (13 mi) from the epicentre. In Cambria, 47 km away, the estimate is intensity II (weak). 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.

How big was it?

This earthquake released about 140 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 110,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 78,000× the energy of this one
  3. Around the size people start to feel M 3.0 6.9× the energy of this one
  4. This earthquake M 2.4 about 140 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

The largest earthquake within 50 km since 2016 was M 4.7 on 2021-10-25 — about 2,100 times the energy of this one.

Before 2016, the USGS record lists 5 earthquakes of M5 or more within 50 km:

  1. 6.5 10 km NE of San Simeon, California · 40 km ESE of this epicentre
  2. 6.2 28km NW of Cambria, CA · 19 km ESE of this epicentre
  3. 5.7 Southwest of Cambria, California · 43 km SE of this epicentre
  4. 5.2 25 km NW of San Simeon, California · 17 km ENE of this epicentre
  5. 5.2 22 km NW of San Simeon, California · 18 km E 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 35.7792, -121.5298. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Monterey County, CA 55 km (34 mi) NNE earthquakes near Monterey County
San Benito County, CA 101 km (63 mi) NNE earthquakes near San Benito County
San Luis Obispo County, CA 107 km (66 mi) ESE earthquakes near San Luis Obispo 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. 1.6 7 km ENE of San Simeon, CA
  2. 2.1 14 km NE of San Simeon, CA
  3. 1.9 16 km WSW of King City, CA
  4. 2.7 12 km NNW of San Simeon, CA
  5. 1.7 14 km SSW of San Simeon, CA
  6. 2.3 6 km WNW of San Simeon, CA
  7. 2.2 11 km NE of San Simeon, CA
  8. 1.6 11 km NE of San Simeon, CA
  9. 2.6 11 km NE of San Simeon, CA
  10. 1.6 17 km NNE of San Simeon, CA
  11. 2.0 2 km ENE of Lopez Point, CA
  12. 1.5 7 km NE of San Simeon, CA
  13. 2.0 13 km NNW of San Simeon, CA
  14. 1.9 14 km NNW of San Simeon, CA
  15. 2.5 14 km NNW of San Simeon, 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.