explosion · reviewed by a seismologist
M 1.7ml
10 km S of Alsea, Oregon
- When
- Magnitude
- M 1.7 (ml)
- Depth
- -0.5 km below the surface
- Felt
- no reports yet
- Nearest
- Benton County, 27 km NNE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 410 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
USGS catalogues this as explosion, not an earthquake.
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 1,000,000× the energy of this one
- Around the size people start to feel M 3.0 92× 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 44.2897, -123.5967. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Benton County, OR | 27 km (16 mi) | SSW of here | earthquakes near Benton County |
| Lincoln County, OR | 46 km (29 mi) | SSE of here | earthquakes near Lincoln County |
| Lane County, OR | 69 km (43 mi) | NW of here | earthquakes near Lane County |
| Polk County, OR | 70 km (43 mi) | SSW of here | earthquakes near Polk County |
| Linn County, OR | 87 km (54 mi) | WSW of here | earthquakes near Linn County |
| Marion County, OR | 106 km (66 mi) | SW of here | earthquakes near Marion County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
6 earthquakes have been recorded within 50 km since this one.
- 1.5 6 km SSE of Monroe, Oregon
- 1.8 2 km ENE of Blodgett, Oregon
- 1.8 5 km SSE of Monroe, Oregon
- 1.6 29 km NE of Florence, Oregon
- 1.9 7 km SE of Toledo, Oregon
- 1.6 6 km NNW of Philomath, Oregon
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.