Earthquake · reviewed by a seismologist
M 1.9md
Earthquake near Bolinas, CA
No earthquake was likely felt in Bolinas in the 24 hours to 5:43 am PST (13:43 UTC). The last one was M 3.8, 50 km (31 mi) ESE, at 8:30 am PDT on 13 August 2026, estimated intensity II (weak) in town; 7,876 felt reports to USGS. Every earthquake near Bolinas
This page: a magnitude 1.9 earthquake was recorded 47 km (29 mi) southwest of Bolinas, CA, at 3:25 pm PST on 26 November 2019 (23:25 UTC), 7.3 km deep.
USGS: 39km SSW of Point Reyes, CA
63 km (39 mi) W of San Francisco, CA · 58 km (36 mi) W of Daly City, CA
- When
- 3:25 pm PST on 26 November 2019 ()
- Where
- 47 km (29 mi) southwest of Bolinas, CA · earthquakes near Bolinas
- Magnitude
- M 1.9 (md)
- Depth
- 7.3 km below the surface
- Felt
- no reports yet
- Nearest
- San Francisco County, 11 km NE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2455 days ago
Earthquake alerts for Bolinas, CA
Get a notification in this browser when USGS records an earthquake near Bolinas, 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 12 km (7 mi) from the epicentre. In Bolinas, 47 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.
How big was it?
This earthquake released about 19 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 5.8 810,000× the energy of this one
- Magna, Utah 2020 M 5.7 580,000× the energy of this one
- Around the size people start to feel M 3.0 51× the energy of this one
- This earthquake M 1.9 about 19 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
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.
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 37.6672, -123.1263. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Francisco County, CA | 11 km (7 mi) | NE | earthquakes near San Francisco County |
| Marin County, CA | 54 km (34 mi) | NE | earthquakes near Marin County |
| San Mateo County, CA | 72 km (45 mi) | ESE | earthquakes near San Mateo County |
| Sonoma County, CA | 97 km (60 mi) | N | earthquakes near Sonoma County |
| Alameda County, CA | 107 km (66 mi) | E | earthquakes near Alameda County |
| Contra Costa County, CA | 107 km (66 mi) | ENE | earthquakes near Contra Costa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
25 earthquakes have been recorded within 50 km since this one.
- 1.7 4 km SSW of Muir Beach, CA
- 2.4 11 km SSW of Bolinas, CA
- 1.8 7 km S of Muir Beach, CA
- 1.9 8 km S of Muir Beach, CA
- 1.6 4 km SW of Muir Beach, CA
- 1.6 9 km W of Lagunitas-Forest Knolls, CA
- 2.0 32 km SSW of Point Reyes, CA
- 2.1 8 km WNW of San Francisco Zoo, CA
- 1.7 7 km SSW of Muir Beach, CA
- 2.2 7 km SSW of Muir Beach, CA
- 1.6 7km S of Muir Beach, CA
- 1.7 10km WNW of San Francisco Zoo, CA
- 2.6 8km WSW of Muir Beach, CA
- 2.6 7km SSW of Muir Beach, CA
- 1.5 9km SW of Point Reyes, 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.