Earthquake · automatic estimate, may change
M 2.1md
Earthquake near San Jose, CA
USGS: 26 km WSW of Westley, CA
35 km (22 mi) ENE of San Jose, CA · 34 km (21 mi) S of Tracy, CA
- When
- 9:04 pm PDT on 29 September 2026 ()
- Where
- 40 km (25 mi) ENE of San Jose, CA · earthquakes near San Jose
- Magnitude
- M 2.1 (md)
- Depth
- 3.7 km below the surface
- Felt
- no reports yet
- Nearest
- Santa Clara County, 31 km SW
- Nearest mapped fault
- Greenville fault, 4 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 2.1 earthquake was recorded 40 km (25 mi) ENE of San Jose, CA, at 9:04 pm PDT on 29 September 2026 (04:04 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
Earthquakes near other towns within 30 km: Patterson.
How big was it?
This earthquake released about 38 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 5.8 390,000× the energy of this one
- Magna, Utah 2020 M 5.7 280,000× the energy of this one
- Around the size people start to feel M 3.0 25× the energy of this one
- This earthquake M 2.1 about 38 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 5.1 on 2022-10-25 — about 31,000 times the energy of this one.
Before 2016, the USGS record lists 10 earthquakes of M5 or more within 50 km; the five largest:
- 6.5 Near Morgan Hill, California · 39 km SSW of this epicentre
- 6.2 Near San Jose, California · 34 km WSW of this epicentre
- 6.2 The 1984 Morgan Hill, California Earthquake · 24 km WSW of this epicentre
- 6.1 Near San Jose, California · 40 km SW of this epicentre
- 5.8 The 1979 Coyote Lake, California Earthquake · 36 km S 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 37.4258, -121.4547. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Santa Clara County, CA | 31 km (19 mi) | SW | earthquakes near Santa Clara County |
| Stanislaus County, CA | 43 km (27 mi) | ENE | earthquakes near Stanislaus County |
| Alameda County, CA | 47 km (29 mi) | WNW | earthquakes near Alameda County |
| San Joaquin County, CA | 59 km (37 mi) | NNE | earthquakes near San Joaquin County |
| Santa Cruz County, CA | 67 km (42 mi) | SW | earthquakes near Santa Cruz County |
| Merced County, CA | 70 km (43 mi) | ESE | earthquakes near Merced County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
No further earthquakes have been recorded within 50 km since this one.
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.