QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6md

8km NNE of Cayucos, CA

· 4.0 km deep · released about 240 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Luis Obispo County 38 kmMonterey County 92 kmKings County 112 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 2.6 (md)
Depth
4.0 km below the surface
Felt
10 reports · strongest reported intensity III
Nearest
San Luis Obispo County, 38 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2053 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 10 people have reported feeling it to USGS.

How big was it?

This earthquake released about 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
  3. Around the size people start to feel M 3.0 4× the energy of this one
  4. This earthquake M 2.6 about 240 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 35.5058, -120.8455. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Luis Obispo County, CA 38 km (24 mi) WNW of here earthquakes near San Luis Obispo County
Monterey County, CA 92 km (57 mi) SSE of here earthquakes near Monterey County
Kings County, CA 112 km (70 mi) SW of here earthquakes near Kings County
Santa Barbara County, CA 130 km (81 mi) NW 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

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

  1. 1.7 11km WSW of Templeton, CA
  2. 2.0 17km N of San Simeon, CA
  3. 1.8 13km N of San Simeon, CA
  4. 1.5 6km NNE of Santa Margarita, CA
  5. 1.8 2km ENE of Cayucos, CA
  6. 2.4 19km NNW of San Simeon, CA
  7. 2.8 9km WNW of Templeton, CA
  8. 1.9 7km WNW of Paso Robles, CA
  9. 2.4 11km SSW of Lake Nacimiento, CA
  10. 1.9 12km W of Templeton, CA
  11. 2.0 7km NE of San Simeon, CA
  12. 1.5 6km NE of Santa Margarita, CA
  13. 2.2 5km WNW of San Simeon, CA
  14. 2.4 6km WNW of San Simeon, CA
  15. 1.6 11km W of Templeton, 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.