Earthquake · reviewed by a seismologist
M 2.1md
11km SSE of Redway, CA
- When
- Magnitude
- M 2.1 (md)
- Depth
- 18 km below the surface
- Felt
- no reports yet
- Nearest
- Mendocino County, 72 km SSE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2007 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 37 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 410,000× the energy of this one
- Magna, Utah 2020 M 5.7 290,000× the energy of this one
- Around the size people start to feel M 3.0 26× the energy of this one
- This earthquake M 2.1 about 37 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 40.0283, -123.7698. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Mendocino County, CA | 72 km (45 mi) | NNW of here | earthquakes near Mendocino County |
| Humboldt County, CA | 77 km (48 mi) | S of here | earthquakes near Humboldt County |
| Trinity County, CA | 88 km (55 mi) | SW of here | earthquakes near Trinity County |
| Glenn County, CA | 126 km (78 mi) | WNW of here | earthquakes near Glenn County |
| Lake County, CA | 135 km (84 mi) | NW of here | earthquakes near Lake County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
46 earthquakes have been recorded within 50 km since this one.
- 1.9 7km NW of Laytonville, CA
- 1.8 0km SW of Laytonville, CA
- 1.8 19km NNW of Laytonville, CA
- 1.6 7km NNW of Laytonville, CA
- 2.1 13km ESE of Redway, CA
- 1.9 12km NNW of Laytonville, CA
- 1.7 14km SE of Petrolia, CA
- 1.7 18km NNW of Laytonville, CA
- 1.6 6km W of Laytonville, CA
- 1.9 10km SSE of Redway, CA
- 1.9 4km ESE of Redway, CA
- 2.4 12km N of Laytonville, CA
- 1.6 9km SSE of Redway, CA
- 1.8 7km W of Laytonville, CA
- 2.4 11km W of Laytonville, 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 2017-12-14 — it released about 2,000 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.