Earthquake · reviewed by a seismologist
M 1.6md
Earthquake near Santa Rosa, CA
No earthquake was likely felt in Santa Rosa in the 24 hours to 12:25 pm PST (20:25 UTC). The last one was M 1.9, 5 km (3 mi) NE, at 2:01 pm PDT on 23 October 2026, estimated intensity II (weak) in town. Every earthquake near Santa Rosa
This page: a magnitude 1.6 earthquake was recorded 32 km (20 mi) southwest of Santa Rosa, CA, at 3:23 pm PDT on 14 September 2024 (22:23 UTC), 10 km deep.
USGS: 2 km S of Dillon Beach, CA
68 km (42 mi) NW of San Francisco, CA · 28 km (18 mi) W of Petaluma, CA
- When
- 3:23 pm PDT on 14 September 2024 ()
- Where
- 32 km (20 mi) southwest of Santa Rosa, CA · earthquakes near Santa Rosa
- Magnitude
- M 1.6 (md)
- Depth
- 10 km below the surface
- Felt
- no reports yet
- Nearest
- Marin County, 26 km SE
- Nearest mapped fault
- San Andreas fault, under 1 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 784 days ago
Earthquake alerts for Santa Rosa, CA
Get a notification in this browser when USGS records an earthquake near Santa Rosa, CA. No account or email needed.
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 4 km (2 mi) from the epicentre. In Santa Rosa, 32 km away, the estimate is intensity I (not felt). 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: Bodega Bay, Inverness, Occidental, Camp Meeker, Sebastopol, Cotati.
How big was it?
This earthquake released about 7.1 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 2,100,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,500,000× the energy of this one
- Around the size people start to feel M 3.0 130× the energy of this one
- This earthquake M 1.6 about 7.1 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 4.4 on 2022-09-14 — about 16,000 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 · 17 km NE of this epicentre
- 5.3 Northern California · 16 km NE 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 38.2178, -122.9522. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Marin County, CA | 26 km (16 mi) | SE | earthquakes near Marin County |
| Sonoma County, CA | 34 km (21 mi) | N | earthquakes near Sonoma County |
| San Francisco County, CA | 55 km (34 mi) | S | earthquakes near San Francisco County |
| Napa County, CA | 63 km (39 mi) | ENE | earthquakes near Napa County |
| Solano County, CA | 89 km (55 mi) | E | earthquakes near Solano County |
| Contra Costa County, CA | 94 km (58 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
38 earthquakes have been recorded within 50 km since this one.
- 1.9 6 km SSW of Larkfield-Wikiup, CA
- 1.7 7 km NE of Larkfield-Wikiup, CA
- 1.8 6 km NNE of Windsor, CA
- 1.5 5 km NE of Windsor, CA
- 2.1 7 km NE of Larkfield-Wikiup, CA
- 2.2 5 km NE of Windsor, CA
- 2.6 6 km WNW of Yountville, CA
- 2.8 3 km ESE of Santa Rosa, CA
- 1.6 5 km NE of Kenwood, CA
- 1.6 9 km W of Lagunitas-Forest Knolls, CA
- 1.5 5 km WSW of Cotati, CA
- 1.7 6 km NNE of Windsor, CA
- 2.2 5 km WSW of Cotati, CA
- 1.9 5 km NNE of Bodega Bay, CA
- 1.7 3 km W of Kenwood, 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.