Earthquake · reviewed by a seismologist
M 3.1ml
Earthquake near Lower Lake, CA
No earthquake was likely felt in Lower Lake in the 24 hours to 3:41 am PST (11:41 UTC). The last one was M 2.6, 19 km (12 mi) SW, at 4:44 pm PST on 8 November 2026, estimated intensity II (weak) in town. Every earthquake near Lower Lake
This page: a magnitude 3.1 earthquake was recorded 6 km (4 mi) west-southwest of Lower Lake, CA, at 7:04 am PST on 3 March 2019 (15:04 UTC), 3.4 km deep. 236 people have reported feeling it to USGS.
USGS: 6km WSW of Lower Lake, CA
50 km (31 mi) N of Santa Rosa, CA · 126 km (78 mi) N of San Francisco, CA
- When
- 7:04 am PST on 3 March 2019 ()
- Where
- 6 km (4 mi) west-southwest of Lower Lake, CA · earthquakes near Lower Lake
- Magnitude
- M 3.1 (ml)
- Depth
- 3.4 km below the surface
- Felt
- 236 reports · strongest reported intensity IV
- Nearest
- Lake County, 24 km NNW
- Nearest mapped fault
- Konocti Bay 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 2739 days ago
Earthquake alerts for Lower Lake, 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 small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth, people at rest would likely notice it out to about 41 km (25 mi) from the epicentre. In Lower Lake, 6 km away, the estimate is intensity III (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: Clearlake 8 km, intensity III · Cobb 9 km, intensity III · Lakeport 26 km, intensity II · Cloverdale 31 km, intensity II · Healdsburg 36 km, intensity II · Upper Lake 36 km, intensity II · Calistoga 36 km, intensity II · Windsor 40 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 260,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
- Magna, Utah 2020 M 5.7 8,200× the energy of this one
- This earthquake M 3.1 about 1,300 lb of TNT
- Around the size people start to feel M 3.0 this one released 1.4× more
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 5.1 on 2016-08-10 — about 1,000 times the energy of this one.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.2 6 km ESE of Talmage, California · 44 km NW 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 38.8952, -122.6802. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Lake County, CA | 24 km (15 mi) | NNW | earthquakes near Lake County |
| Sonoma County, CA | 46 km (29 mi) | SSW | earthquakes near Sonoma County |
| Colusa County, CA | 49 km (31 mi) | NE | earthquakes near Colusa County |
| Napa County, CA | 53 km (33 mi) | SE | earthquakes near Napa County |
| Yolo County, CA | 72 km (44 mi) | ESE | earthquakes near Yolo County |
| Glenn County, CA | 82 km (51 mi) | NNE | earthquakes near Glenn County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
60 earthquakes have been recorded within 50 km since this one.
- 2.2 6km SE of Calistoga, CA
- 1.6 4km NW of The Geysers, CA
- 1.8 9km WNW of Cobb, CA
- 1.9 7km NE of Healdsburg, CA
- 1.8 9km WNW of Cobb, CA
- 1.7 2km NNW of The Geysers, CA
- 1.9 7km WNW of The Geysers, CA
- 1.5 6km NW of The Geysers, CA
- 2.6 6km NW of The Geysers, CA
- 1.6 2km NNW of The Geysers, CA
- 1.7 7km NNW of Kenwood, CA
- 1.8 3km NW of The Geysers, CA
- 1.9 8km NW of The Geysers, CA
- 1.6 9km WNW of Cobb, CA
- 1.6 3km SE 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.