QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

8 km SW of Aloha, Oregon

· 28 km deep · released about 6.8 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Washington County 19 kmYamhill County 36 kmMultnomah County 42 kmClark County 52 kmColumbia County 58 kmTillamook County 65 kmClackamas County 65 kmMarion County 65 kmPolk County 69 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
28 km below the surface
Felt
no reports yet
Nearest
Washington County, 19 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 565 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 6.8 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.

  1. Mineral, Virginia 2011 M 5.8 2,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
  3. Around the size people start to feel M 3.0 140× the energy of this one
  4. This earthquake M 1.6 about 6.8 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 45.4275, -122.9317. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Washington County, OR 19 km (12 mi) SE of here earthquakes near Washington County
Yamhill County, OR 36 km (22 mi) ENE of here earthquakes near Yamhill County
Multnomah County, OR 42 km (26 mi) WSW of here earthquakes near Multnomah County
Clark County, WA 52 km (32 mi) SW of here earthquakes near Clark County
Columbia County, OR 58 km (36 mi) SSE of here earthquakes near Columbia County
Tillamook County, OR 65 km (40 mi) E of here earthquakes near Tillamook County

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

Aftershocks so far

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

  1. 1.9 5 km SSW of Aloha, Oregon
  2. 2.4 10 km N of Sheridan, Oregon
  3. 1.6 3 km WNW of Lafayette, Oregon
  4. 1.6 3 km WSW of Stafford, Oregon
  5. 1.8 1 km NNW of Dayton, Oregon
  6. 1.8 8 km S of Scappoose, Oregon
  7. 1.9 2 km ENE of Silverton, Oregon
  8. 1.6 2 km N of Woodburn, Oregon
  9. 1.6 7 km SSW of Dayton, Oregon
  10. 1.8 4 km NE of Lafayette, Oregon
  11. 1.8 2 km ENE of Brush Prairie, Washington
  12. 1.9 4 km NE of Lafayette, Oregon
  13. 1.5 13 km SSE of Vernonia, Oregon
  14. 1.7 3 km SE of Sherwood, Oregon
  15. 1.7 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

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