Earthquake · reviewed by a seismologist
M 1.8md
9km N of McCloud, CA
- When
- Magnitude
- M 1.8 (md)
- Depth
- 5.7 km below the surface
- Felt
- no reports yet
- Nearest
- Siskiyou County, 42 km NW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2187 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 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 730,000× the energy of this one
- Around the size people start to feel M 3.0 65× the energy of this one
- This earthquake M 1.8 about 15 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 41.3397, -122.1515. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Siskiyou County, CA | 42 km (26 mi) | SE of here | earthquakes near Siskiyou County |
| Shasta County, CA | 65 km (40 mi) | N of here | earthquakes near Shasta County |
| Trinity County, CA | 112 km (69 mi) | NE of here | earthquakes near Trinity County |
| Modoc County, CA | 123 km (76 mi) | WSW of here | earthquakes near Modoc County |
| Jackson County, OR | 127 km (79 mi) | SSE of here | earthquakes near Jackson County |
| Josephine County, OR | 166 km (103 mi) | SE of here | earthquakes near Josephine 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.
- 1.7 12km SSW of Tennant, CA
- 1.8 4km N of McCloud, CA
- 1.7 27km N of Shasta Lake, CA
- 1.9 13km N of McCloud, CA
- 1.7 9km ESE of Grenada, CA
- 2.1 14km E of Big Bend, CA
- 1.9 8km SSE of Tennant, CA
- 1.9 4km NNE of McCloud, CA
- 2.2 4km NNE of McCloud, CA
- 1.8 3km N of McCloud, CA
- 1.6 2km N of McCloud, CA
- 1.9 16km SSE of McCloud, CA
- 1.6 19km NE of Big Bend, CA
- 1.9 19km SW of Tennant, CA
- 1.6 12km SE of Dunsmuir, 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.