Earthquake · automatic estimate, may change
M 1.3md
Earthquake near Greenfield, CA
USGS: 22 km SE of Pinnacles, CA
- When
- 3:15 am PDT on 30 September 2026 ()
- Where
- 26 km (16 mi) ENE of Greenfield, CA · earthquakes near Greenfield
- Magnitude
- M 1.3 (md)
- Depth
- 6.4 km below the surface
- Felt
- no reports yet
- Nearest
- San Benito County, 26 km NNW
- Nearest mapped fault
- San Andreas fault, 1 km from its surface trace — near is not the same as on
- Status
- Automatic — a machine’s first estimate, which may change
USGS · last changed by USGS · we first saw it 3 days ago
A magnitude 1.3 earthquake was recorded 26 km (16 mi) ENE of Greenfield, CA, at 3:15 am PDT on 30 September 2026 (10:15 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
Earthquakes near other towns within 30 km: King City.
How big was it?
This earthquake released about 2.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.3 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 6,700,000× the energy of this one
- Magna, Utah 2020 M 5.7 4,700,000× the energy of this one
- Around the size people start to feel M 3.0 420× the energy of this one
- This earthquake M 1.3 about 2.3 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
The largest earthquake within 50 km since 2016 was M 4.7 on 2019-10-15 — about 150,000 times the energy of this one.
Before 2016, the USGS record lists 13 earthquakes of M5 or more within 50 km; the five largest:
- 6.1 Northwest of Huron, California · 35 km ENE of this epicentre
- 5.9 10 km SE of Tres Pinos, California · 44 km NNW of this epicentre
- 5.8 Near Paicines, California · 39 km NW of this epicentre
- 5.8 29 km NE of San Lucas, California · 21 km ESE of this epicentre
- 5.5 12 km S of Tres Pinos, California · 43 km NW 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 36.3953, -120.9712. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Benito County, CA | 26 km (16 mi) | NNW | earthquakes near San Benito County |
| Monterey County, CA | 35 km (22 mi) | WSW | earthquakes near Monterey County |
| Merced County, CA | 92 km (57 mi) | NNE | earthquakes near Merced County |
| Kings County, CA | 110 km (68 mi) | ESE | earthquakes near Kings County |
| Santa Clara County, CA | 112 km (70 mi) | NW | earthquakes near Santa Clara County |
| Santa Cruz County, CA | 115 km (72 mi) | NW | earthquakes near Santa Cruz County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
6 earthquakes have been recorded within 50 km since this one.
- 1.5 11 km E of Pinnacles, CA
- 1.9 5 km NW of Pinnacles, CA
- 2.3 10 km SSE of Pinnacles, CA
- 1.5 5 km N of Pinnacles, CA
- 2.5 10 km NW of Pinnacles, CA
- 2.4 7 km SE of Pinnacles, 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
- 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.