Earthquake · reviewed by a seismologist
M 1.8md
24km NW of Parkfield, CA
- When
- Magnitude
- M 1.8 (md)
- Depth
- 3.2 km below the surface
- Felt
- no reports yet
- Nearest
- Monterey County, 66 km WNW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1755 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
How big was it?
This earthquake released about 17 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 870,000× the energy of this one
- Magna, Utah 2020 M 5.7 620,000× the energy of this one
- Around the size people start to feel M 3.0 55× the energy of this one
- This earthquake M 1.8 about 17 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 36.0512, -120.6177. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Monterey County, CA | 66 km (41 mi) | ESE of here | earthquakes near Monterey County |
| Kings County, CA | 72 km (45 mi) | W of here | earthquakes near Kings County |
| San Benito County, CA | 75 km (47 mi) | SE of here | earthquakes near San Benito County |
| San Luis Obispo County, CA | 75 km (47 mi) | NNW of here | earthquakes near San Luis Obispo County |
| Fresno County, CA | 117 km (73 mi) | SW of here | earthquakes near Fresno County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
35 earthquakes have been recorded within 50 km since this one.
- 1.6 23km WSW of New Idria, CA
- 1.9 16km NW of Parkfield, CA
- 2.0 22km SE of Pinnacles, CA
- 2.0 17km NW of Parkfield, CA
- 1.7 24km ENE of San Ardo, CA
- 1.6 18km WNW of Coalinga, CA
- 2.2 5km NW of Avenal, CA
- 1.7 25km E of San Ardo, CA
- 2.3 25km E of San Ardo, CA
- 1.9 3km SW of Huron, CA
- 1.8 22km NE of San Lucas, CA
- 2.8 8km NNW of Cholame, CA
- 3.0 7km NNW of Cholame, CA
- 1.5 13km SW of Huron, CA
- 1.8 6km NNE of Avenal, 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 4,700 times the energy of this one.
From the QuakeIndex catalogue, built from the USGS FDSN event service.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.