Earthquake · reviewed by a seismologist
M 2.1md
4km NNW of Hollister, CA
- When
- Magnitude
- M 2.1 (md)
- Depth
- 7.8 km below the surface
- Felt
- 2 reports · strongest reported intensity II
- Nearest
- San Benito County, 42 km SE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1322 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.
How big was it?
This earthquake released about 40 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 380,000× the energy of this one
- Magna, Utah 2020 M 5.7 270,000× the energy of this one
- Around the size people start to feel M 3.0 24× the energy of this one
- This earthquake M 2.1 about 40 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 36.8838, -121.4157. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| San Benito County, CA | 42 km (26 mi) | NW of here | earthquakes near San Benito County |
| Santa Clara County, CA | 45 km (28 mi) | SSE of here | earthquakes near Santa Clara County |
| Santa Cruz County, CA | 55 km (34 mi) | ESE of here | earthquakes near Santa Cruz County |
| Merced County, CA | 71 km (44 mi) | WSW of here | earthquakes near Merced County |
| Monterey County, CA | 72 km (45 mi) | N of here | earthquakes near Monterey County |
| Stanislaus County, CA | 84 km (52 mi) | SSW of here | earthquakes near Stanislaus County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
55 earthquakes have been recorded within 50 km since this one.
- 1.6 11km N of Morgan Hill, CA
- 1.7 10km S of Tres Pinos, CA
- 2.0 22km WSW of Gustine, CA
- 1.8 9km NW of Pinnacles, CA
- 1.7 6km N of Pinnacles, CA
- 1.9 16km NW of Pinnacles, CA
- 1.8 16km NW of Pinnacles, CA
- 1.5 5km NE of San Martin, CA
- 1.7 7km ESE of Prunedale, CA
- 1.9 5km WSW of Tres Pinos, CA
- 2.0 10km S of Tres Pinos, CA
- 2.0 11km S of Tres Pinos, CA
- 1.8 7km NNW of Pinnacles, CA
- 2.8 11km S of Tres Pinos, CA
- 2.9 11km S of Tres Pinos, 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 4.7 on 2019-10-15 — it released about 8,800 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.