Earthquake · reviewed by a seismologist
M 1.5md
Earthquake near Laytonville, CA
No earthquake was likely felt in Laytonville in the 24 hours to 6:51 am PST (14:51 UTC). The last one was M 2.4, 13 km (8 mi) WSW, at 7:25 am PST on 4 November 2026, estimated intensity II (weak) in town. Every earthquake near Laytonville
This page: a magnitude 1.5 earthquake was recorded 13 km (8 mi) north-northeast of Laytonville, CA, at 12:01 am PDT on 30 July 2023 (07:01 UTC), 10 km deep.
USGS: 13 km NNE of Laytonville, CA
- When
- 12:01 am PDT on 30 July 2023 ()
- Where
- 13 km (8 mi) north-northeast of Laytonville, CA · earthquakes near Laytonville
- Magnitude
- M 1.5 (md)
- Depth
- 10 km below the surface
- Felt
- no reports yet
- Nearest
- Mendocino County, 40 km S
- Nearest mapped fault
- Bartlett Springs fault system, 8 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 1201 days ago
Earthquake alerts for Laytonville, 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 2 km (1 mi) from the epicentre. In Laytonville, 13 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: Covelo.
How big was it?
This earthquake released about 6.2 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
- Around the size people start to feel M 3.0 150× the energy of this one
- This earthquake M 1.5 about 6.2 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 4.3 on 2017-12-14 — about 12,000 times the energy of this one.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.9 9 km S of Leggett, California · 27 km W 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 39.7892, -123.4138. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Mendocino County, CA | 40 km (25 mi) | S | earthquakes near Mendocino County |
| Glenn County, CA | 89 km (55 mi) | ESE | earthquakes near Glenn County |
| Lake County, CA | 95 km (59 mi) | SE | earthquakes near Lake County |
| Trinity County, CA | 99 km (61 mi) | NNE | earthquakes near Trinity County |
| Tehama County, CA | 107 km (67 mi) | ENE | earthquakes near Tehama County |
| Humboldt County, CA | 111 km (69 mi) | NNW | earthquakes near Humboldt County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
48 earthquakes have been recorded within 50 km since this one.
- 1.9 9 km ESE of Redway, CA
- 2.0 12 km N of Brooktrails, CA
- 2.2 12 km NNW of Lake Pillsbury, CA
- 1.8 8 km NE of Brooktrails, CA
- 1.7 9 km NE of Brooktrails, CA
- 1.9 12 km N of Brooktrails, CA
- 1.6 11 km NNW of Lake Pillsbury, CA
- 2.1 12 km NNW of Lake Pillsbury, CA
- 2.0 7 km ESE of Willits, CA
- 2.2 9 km NNE of Rockport, CA
- 1.6 14 km NW of Laytonville, CA
- 1.7 10 km SSE of Redway, CA
- 2.3 14 km NW of Laytonville, CA
- 1.5 13 km NNE of Brooktrails, CA
- 1.5 8 km SE of Willits, 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.