Earthquake · reviewed by a seismologist
M 1.9md
7 km NW of Montgomery Creek, California
- When
- Magnitude
- M 1.9 (md)
- Depth
- 16 km below the surface
- Felt
- 3 reports · strongest reported intensity II
- Nearest
- Shasta County, 15 km SSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1513 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 3 people have reported feeling it to USGS.
How big was it?
This earthquake released about 20 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 760,000× the energy of this one
- Magna, Utah 2020 M 5.7 540,000× the energy of this one
- Around the size people start to feel M 3.0 48× the energy of this one
- This earthquake M 1.9 about 20 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 40.8900, -121.9835. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Shasta County, CA | 15 km (9 mi) | NNE of here | earthquakes near Shasta County |
| Tehama County, CA | 88 km (54 mi) | NNE of here | earthquakes near Tehama County |
| Siskiyou County, CA | 90 km (56 mi) | SSE of here | earthquakes near Siskiyou County |
| Trinity County, CA | 99 km (62 mi) | ENE of here | earthquakes near Trinity County |
| Lassen County, CA | 116 km (72 mi) | W of here | earthquakes near Lassen County |
| Modoc County, CA | 132 km (82 mi) | SW of here | earthquakes near Modoc 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.
- 1.8 1km WSW of Palo Cedro, CA
- 2.8 9km SSW of McCloud, CA
- 1.8 1km SW of Palo Cedro, CA
- 1.5 3km NW of Palo Cedro, CA
- 2.5 6km ENE of Redding, CA
- 1.5 1km WNW of Palo Cedro, CA
- 1.9 25km SE of Burney, CA
- 1.5 2km W of Palo Cedro, CA
- 2.4 1km SW of Palo Cedro, CA
- 1.5 12km N of Burney, CA
- 2.6 18km N of Big Bend, CA
- 2.0 10km SSW of Big Bend, CA
- 2.2 2km E of Shasta Lake, CA
- 1.5 3km E of Millville, CA
- 1.7 8km NE of Burney, 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.