QuakeIndex

explosion · reviewed by a seismologist

M 1.6ml

15 km N of Cascadia, Oregon

· -0.9 km deep · released about 6.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Linn County 8 kmMarion County 41 kmClackamas County 73 kmLane County 76 kmBenton County 76 kmPolk County 84 kmJefferson County 103 kmYamhill County 104 kmMultnomah County 112 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 1.6 (ml)
Depth
-0.9 km below the surface
Felt
no reports yet
Nearest
Linn County, 8 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1122 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 6.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.6 about 6.4 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 44.5367, -122.4652. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Linn County, OR 8 km (5 mi) NE of here earthquakes near Linn County
Marion County, OR 41 km (26 mi) SSE of here earthquakes near Marion County
Clackamas County, OR 73 km (45 mi) SSW of here earthquakes near Clackamas County
Lane County, OR 76 km (47 mi) NNE of here earthquakes near Lane County
Benton County, OR 76 km (47 mi) E of here earthquakes near Benton County
Polk County, OR 84 km (52 mi) ESE of here earthquakes near Polk County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

30 earthquakes have been recorded within 50 km since this one.

  1. 1.2 13 km SE of Scotts Mills, Oregon
  2. 1.8 5 km NW of Lacomb, Oregon
  3. 1.6 5 km NW of Lacomb, Oregon
  4. 2.0 6 km W of Lacomb, Oregon
  5. 1.6 9 km SSE of Crawfordsville, Oregon
  6. 1.5 4 km SSE of Cascadia, Oregon
  7. 1.8 3 km W of Mehama, Oregon
  8. 1.5 1 km NNE of Cascadia, Oregon
  9. 2.0 4 km N of Sweet Home, Oregon
  10. 1.8 5 km N of Waterloo, Oregon
  11. 1.7 5 km W of Mehama, Oregon
  12. 1.5 3 km S of Brownsville, Oregon
  13. 1.6 22 km N of Unity, Oregon
  14. 1.7 14 km N of Mehama, Oregon
  15. 1.9 5 km ENE of Lebanon, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2022-10-07 — it released about 18,000 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.