Earthquake · automatic estimate, may change
M 1.9md
Earthquake near Sebastopol, CA
No earthquake was likely felt in Sebastopol in the 24 hours to 10:08 am PST (18:08 UTC). The last one was M 2.4, 20 km (12 mi) SSE, at 3:02 pm PDT on 2 October 2026, estimated intensity II (weak) in town; 1 felt report to USGS. Every earthquake near Sebastopol
This page: a magnitude 1.9 earthquake was recorded 3 km (2 mi) northeast of Sebastopol, CA, at 10:57 am PST on 5 December 2024 (18:57 UTC), 14 km deep. 25 people have reported feeling it to USGS. The magnitude and location are an automatic first estimate and may change.
USGS: 3 km ENE of Sebastopol, CA
8 km (5 mi) WSW of Santa Rosa, CA
- When
- 10:57 am PST on 5 December 2024 ()
- Where
- 3 km (2 mi) northeast of Sebastopol, CA · earthquakes near Sebastopol
- Magnitude
- M 1.9 (md)
- Depth
- 14 km below the surface
- Felt
- 25 reports · strongest reported intensity IV
- Nearest
- Sonoma County, 17 km NW
- Nearest mapped fault
- Rodgers Creek fault, 9 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 695 days ago
Earthquake alerts for Sebastopol, 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 5 km (3 mi) from the epicentre. In Sebastopol, 3 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: Graton, Santa Rosa, Forestville, Larkfield-Wikiup, Rohnert Park, Cotati.
How big was it?
This earthquake released about 22 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 680,000× the energy of this one
- Magna, Utah 2020 M 5.7 480,000× the energy of this one
- Around the size people start to feel M 3.0 43× the energy of this one
- This earthquake M 1.9 about 22 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 5.0 on 2016-12-14 — about 45,000 times the energy of this one.
Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:
- 6.0 The 2014 South Napa, California Earthquake · 48 km ESE of this epicentre
- 5.3 3 km E of Bloomfield, California · 12 km S of this epicentre
- 5.3 Northern California · 11 km SSW 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 38.4205, -122.7917. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Sonoma County, CA | 17 km (10 mi) | NW | earthquakes near Sonoma County |
| Marin County, CA | 41 km (26 mi) | S | earthquakes near Marin County |
| Napa County, CA | 42 km (26 mi) | ENE | earthquakes near Napa County |
| Solano County, CA | 76 km (47 mi) | ESE | earthquakes near Solano County |
| Lake County, CA | 77 km (48 mi) | N | earthquakes near Lake County |
| San Francisco County, CA | 80 km (50 mi) | SSW | earthquakes near San Francisco County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
58 earthquakes have been recorded within 50 km since this one.
- 2.0 2 km of The Geysers, CA
- 2.2 12 km E of St. Helena, CA
- 1.6 3 km NW of Anderson Springs, CA
- 2.0 2 km NNE of The Geysers, CA
- 1.7 5 km WNW of The Geysers, CA
- 1.8 7 km NW of The Geysers, CA
- 1.8 6 km WNW of Cobb, CA
- 1.5 6 km NNW of The Geysers, CA
- 1.6 2 km NW of The Geysers, CA
- 2.0 3 km NNW of The Geysers, CA
- 2.1 3 km NNW of The Geysers, CA
- 1.5 4 km WNW of Cobb, CA
- 2.5 1 km NW of The Geysers, CA
- 2.4 6 km WNW of Cobb, CA
- 1.6 9 km NW of The Geysers, 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.