explosion · reviewed by a seismologist
M 1.6md
7 km ESE of Molalla, Oregon
- When
- Magnitude
- M 1.6 (md)
- Depth
- -0.8 km below the surface
- Felt
- no reports yet
- Nearest
- Clackamas County, 23 km ENE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 52 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 9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,700,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
- Around the size people start to feel M 3.0 110× the energy of this one
- This earthquake M 1.6 about 9 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 45.1175, -122.4855. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Clackamas County, OR | 23 km (14 mi) | WSW of here | earthquakes near Clackamas County |
| Marion County, OR | 25 km (16 mi) | NNE of here | earthquakes near Marion County |
| Multnomah County, OR | 48 km (30 mi) | S of here | earthquakes near Multnomah County |
| Yamhill County, OR | 67 km (41 mi) | ESE of here | earthquakes near Yamhill County |
| Washington County, OR | 68 km (42 mi) | SE of here | earthquakes near Washington County |
| Linn County, OR | 70 km (44 mi) | N of here | earthquakes near Linn County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
4 earthquakes have been recorded within 50 km since this one.
- 1.2 13 km SE of Scotts Mills, Oregon
- 2.1 8 km ESE of Molalla, Oregon
- 1.6 5 km SSE of Molalla, Oregon
- 1.5 9 km ESE of Scotts Mills, 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.