Earthquake · reviewed by a seismologist
M 1.7md
19km SW of Laytonville, CA
- When
- Magnitude
- M 1.7 (md)
- Depth
- 7.9 km below the surface
- Felt
- no reports yet
- Nearest
- Mendocino County, 19 km SE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1944 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
How big was it?
This earthquake released about 10 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,500,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
- Around the size people start to feel M 3.0 95× the energy of this one
- This earthquake M 1.7 about 10 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.
Where
Epicentre 39.5502, -123.6073. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Mendocino County, CA | 19 km (12 mi) | NW of here | earthquakes near Mendocino County |
| Lake County, CA | 89 km (55 mi) | NW of here | earthquakes near Lake County |
| Glenn County, CA | 103 km (64 mi) | W of here | earthquakes near Glenn County |
| Colusa County, CA | 125 km (78 mi) | WNW of here | earthquakes near Colusa County |
| Sonoma County, CA | 128 km (80 mi) | NNW of here | earthquakes near Sonoma County |
| Tehama County, CA | 134 km (83 mi) | WSW of here | earthquakes near Tehama County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
51 earthquakes have been recorded within 50 km since this one.
- 1.5 13km N of Brooktrails, CA
- 1.8 19km NNW of Laytonville, CA
- 1.7 14km NNE of Brooktrails, CA
- 1.6 9km E of Willits, CA
- 1.6 7km NNW of Laytonville, CA
- 1.8 8km NNW of Redwood Valley, CA
- 1.7 10km SSE of Laytonville, CA
- 1.9 12km NNW of Laytonville, CA
- 1.7 6km E of Willits, CA
- 1.7 18km NNW of Laytonville, CA
- 2.2 7km ESE of Willits, CA
- 2.3 7km ESE of Willits, CA
- 1.6 10km NNW of Redwood Valley, CA
- 1.7 8km SSW of Covelo, CA
- 1.8 2km ESE of Redwood Valley, 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.
For this area
The largest earthquake within 50 km in our catalogue was M 4.3 on 2019-04-29 — it released about 9,100 times the energy of this one.
From the QuakeIndex catalogue, built from the USGS FDSN event service.
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.