Earthquake · reviewed by a seismologist
M 4.8mw
89 km WSW of Crescent City, CA
- When
- Magnitude
- M 4.8 (mw)
- Depth
- 26 km below the surface
- Felt
- 28 reports · strongest reported intensity III
- Measured shaking
- intensity III (ShakeMap)
- USGS impact alert
- green
- Nearest
- Del Norte County, 106 km ENE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2 days ago
This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 28 people have reported feeling it to USGS.
How big was it?
This earthquake released about 240 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.8 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 710× the energy of this one
- Mineral, Virginia 2011 M 5.8 32× the energy of this one
- Magna, Utah 2020 M 5.7 22× the energy of this one
- This earthquake M 4.8 about 240 tons of TNT
- Around the size people start to feel M 3.0 this one released 500× 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.
Where
Epicentre 41.5027, -125.2180. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Del Norte County, CA | 106 km (66 mi) | WSW of here | earthquakes near Del Norte County |
| Curry County, OR | 136 km (84 mi) | SW of here | earthquakes near Curry County |
| Humboldt County, CA | 140 km (87 mi) | NW of here | earthquakes near Humboldt County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
3 earthquakes have been recorded within 50 km since this one.
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 4.6 on 2017-07-29.
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.