Earthquake · automatic estimate, may change
M 1.6md
Earthquake near Green Valley, CA
No earthquake was likely felt in Green Valley in the 24 hours to 7:57 am PST (15:57 UTC). The last one was M 1.8, 13 km (8 mi) S, at 11:09 am PST on 4 November 2026, estimated intensity II (weak) in town. Every earthquake near Green Valley
This page: a magnitude 1.6 earthquake was recorded 5 km (3 mi) east of Green Valley, CA, at 12:16 am PST on 7 December 2024 (08:16 UTC), 9.7 km deep. The magnitude and location are an automatic first estimate and may change.
USGS: 5 km E of Green Valley, CA
6 km (4 mi) W of Fairfield, CA
- When
- 12:16 am PST on 7 December 2024 ()
- Where
- 5 km (3 mi) east of Green Valley, CA · earthquakes near Green Valley
- Magnitude
- M 1.6 (md)
- Depth
- 9.7 km below the surface
- Felt
- no reports yet
- Nearest
- Solano County, 15 km E
- Nearest mapped fault
- Cordelia fault, 5 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 705 days ago
Earthquake alerts for Green Valley, CA
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 6 km (4 mi) from the epicentre. In Green Valley, 5 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Likely felt in: Fairfield 6 km, intensity II · Suisun 6 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 8.1 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,900,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
- Around the size people start to feel M 3.0 120× the energy of this one
- This earthquake M 1.6 about 8.1 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 4.5 on 2019-10-15 — about 18,000 times the energy of this one.
Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:
- 6.0 The 2014 South Napa, California Earthquake · 19 km WSW of this epicentre
- 5.4 South of Elmira, California · 19 km ENE 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 38.2538, -122.1058. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Solano County, CA | 15 km (9 mi) | E | earthquakes near Solano County |
| Napa County, CA | 34 km (21 mi) | NW | earthquakes near Napa County |
| Contra Costa County, CA | 40 km (25 mi) | SSE | earthquakes near Contra Costa County |
| Yolo County, CA | 51 km (31 mi) | NNE | earthquakes near Yolo County |
| Marin County, CA | 60 km (38 mi) | WSW | earthquakes near Marin County |
| Alameda County, CA | 70 km (43 mi) | SSE | earthquakes near Alameda County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
52 earthquakes have been recorded within 50 km since this one.
- 2.5 4 km W of Alamo, CA
- 2.5 4 km W of Alamo, CA
- 1.7 13 km NNE of Pittsburg, CA
- 1.6 1 km S of Pacheco, CA
- 1.7 0 km NNE of East Richmond Heights, CA
- 1.5 7 km E of Vallejo, CA
- 1.8 3 km ESE of Pacheco, CA
- 1.8 6 km SW of Clayton, CA
- 1.7 3 km W of Kenwood, CA
- 1.6 3 km SW of Clayton, CA
- 2.7 7 km W of Kenwood, CA
- 1.7 3 km NNE of Saint Helena, CA
- 1.6 6 km SW of Clayton, CA
- 2.2 7 km NE of Alamo, CA
- 2.5 5 km W of Pleasant Hill, 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.