Earthquake · automatic estimate, may change
M 1.8md
Earthquake near Inverness, CA
No earthquake was likely felt in Inverness in the 24 hours to 1:42 pm PST (21:42 UTC). The last one was M 3.3, 46 km (29 mi) NNE, at 10:33 am PDT on 3 September 2026, estimated intensity II (weak) in town; 1,843 felt reports to USGS. Every earthquake near Inverness
This page: a magnitude 1.8 earthquake was recorded 6 km (3 mi) north-northwest of Inverness, CA, at 9:05 pm PST on 26 December 2025 (05:05 UTC), 20 km deep. 1 person has reported feeling it to USGS. The magnitude and location are an automatic first estimate and may change.
USGS: 6 km NNW of Inverness, CA
58 km (36 mi) NW of San Francisco, CA · 25 km (15 mi) WSW of Petaluma, CA
- When
- 9:05 pm PST on 26 December 2025 ()
- Where
- 6 km (3 mi) north-northwest of Inverness, CA · earthquakes near Inverness
- Magnitude
- M 1.8 (md)
- Depth
- 20 km below the surface
- Felt
- 1 report
- Nearest
- Marin County, 16 km SE
- Nearest mapped fault
- San Andreas fault, under 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 321 days ago
Earthquake alerts for Inverness, CA
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This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth it was probably too small to be felt, even directly above it. In Inverness, 6 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.
Earthquakes near other towns within 30 km: Lagunitas-Forest Knolls, Petaluma, Cotati, Bodega Bay, Penngrove, Woodacre.
How big was it?
This earthquake released about 15 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 1,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 710,000× the energy of this one
- Around the size people start to feel M 3.0 63× the energy of this one
- This earthquake M 1.8 about 15 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 4.4 on 2022-09-14 — about 7,700 times the energy of this one.
Before 2016, the USGS record lists 2 earthquakes of M5 or more within 50 km:
- 5.3 3 km E of Bloomfield, California · 20 km NNE of this epicentre
- 5.3 Northern California · 20 km NNE 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 38.1460, -122.8830. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Marin County, CA | 16 km (10 mi) | SE | earthquakes near Marin County |
| Sonoma County, CA | 42 km (26 mi) | N | earthquakes near Sonoma County |
| San Francisco County, CA | 48 km (30 mi) | SSW | earthquakes near San Francisco County |
| Napa County, CA | 63 km (39 mi) | NE | earthquakes near Napa County |
| Solano County, CA | 84 km (52 mi) | E | earthquakes near Solano County |
| Contra Costa County, CA | 85 km (53 mi) | ESE | earthquakes near Contra Costa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
34 earthquakes have been recorded within 50 km since this one.
- 1.8 7 km W of Saint Helena, CA
- 1.8 8 km W of Saint Helena, CA
- 1.9 4 km ESE of Santa Rosa, CA
- 1.6 4 km ESE of Santa Rosa, CA
- 2.7 3 km ESE of Santa Rosa, CA
- 3.3 3 km ESE of Larkfield-Wikiup, CA
- 1.8 6 km ESE of Santa Rosa, CA
- 1.7 5 km W of Glen Ellen, CA
- 2.1 7 km W of Kenwood, CA
- 1.5 7 km E of Santa Venetia, CA
- 2.2 7 km ESE of Roseland, CA
- 1.5 8 km WSW of Cotati, CA
- 1.6 6 km WSW of Kenwood, CA
- 2.3 6 km W of Yountville, CA
- 1.6 9 km E of Larkfield-Wikiup, 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.