QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7md

21 km NW of San Simeon, California

· 8.1 km deep · released about 320 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Monterey County 52 kmSan Luis Obispo County 93 kmSan Benito County 96 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 2.7 (md)
Depth
8.1 km below the surface
Felt
4 reports · strongest reported intensity III
Nearest
Monterey County, 52 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3448 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 4 people have reported feeling it to USGS.

How big was it?

This earthquake released about 320 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 48,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 34,000× the energy of this one
  3. Around the size people start to feel M 3.0 3× the energy of this one
  4. This earthquake M 2.7 about 320 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 35.7752, -121.3667. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Monterey County, CA 52 km (32 mi) S of here earthquakes near Monterey County
San Luis Obispo County, CA 93 km (58 mi) WNW of here earthquakes near San Luis Obispo County
San Benito County, CA 96 km (60 mi) SSW of here earthquakes near San Benito County

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

Aftershocks so far

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

  1. 1.8 7 km ENE of San Simeon, California
  2. 1.7 5 km W of San Ardo, California
  3. 2.4 7 km ENE of San Simeon, California
  4. 1.7 3 km W of San Ardo, California
  5. 1.8 23 km SE of Big Sur, California
  6. 2.5 9 km SW of Oak Shores, California
  7. 1.8 7 km SW of Oak Shores, California
  8. 2.0 8 km SW of Oak Shores, California
  9. 2.3 8 km NE of San Simeon, California
  10. 2.2 11 km SSW of Lake Nacimiento, California
  11. 1.7 8 km E of San Simeon, California
  12. 1.7 16 km WSW of Lockwood, California
  13. 1.6 1 km SE of San Ardo, California
  14. 1.8 14 km NNW of San Simeon, California
  15. 1.7 7 km NE of Lockwood, 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.