QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

37 km NW of San Simeon, California

92 km (57 mi) S of Salinas, CA

· 8.3 km deep · released about 18 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Monterey County 44 kmSan Benito County 90 kmSan Luis Obispo County 109 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 1.9 (md)
Depth
8.3 km below the surface
Felt
no reports yet
Nearest
Monterey County, 44 km NNE
Nearest mapped fault
San Gregorio fault, 2 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 3521 days ago

A magnitude 1.9 earthquake was recorded 37 km NW of San Simeon, California at 09:30 UTC on 2016-09-02. This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 18 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 840,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 600,000× the energy of this one
  3. Around the size people start to feel M 3.0 53× the energy of this one
  4. This earthquake M 1.9 about 18 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists 7 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.5 10 km NE of San Simeon, California · 40 km ESE of this epicentre
  2. 6.2 28km NW of Cambria, CA · 22 km SE of this epicentre
  3. 5.7 Southwest of Cambria, California · 49 km SSE of this epicentre
  4. 5.2 26km NNW of Lake Nacimiento, CA · 48 km E of this epicentre
  5. 5.2 25 km NW of San Simeon, California · 13 km ESE 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 35.8740, -121.4930. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Monterey County, CA 44 km (27 mi) NNE earthquakes near Monterey County
San Benito County, CA 90 km (56 mi) NNE earthquakes near San Benito County
San Luis Obispo County, CA 109 km (68 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

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

  1. 1.7 18 km SW of San Simeon, California
  2. 1.6 9 km ENE of San Simeon, California
  3. 1.7 7 km ENE of San Simeon, California
  4. 1.7 18 km ESE of Big Sur, California
  5. 1.6 11 km SW of Oak Shores, California
  6. 1.6 9km W of San Ardo, CA
  7. 2.0 26 km WSW of Lockwood, California
  8. 2.0 34 km W of San Simeon, California
  9. 1.8 38 km NW of San Simeon, California
  10. 1.8 21 km NW of San Simeon, California
  11. 2.4 21 km NW of San Simeon, California
  12. 1.7 0 km WSW of San Simeon, California
  13. 1.9 28 km SE of Big Sur, California
  14. 2.9 28 km SE of Big Sur, California
  15. 1.7 23 km NW of San Simeon, 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.