QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

8 km S of Scappoose, Oregon

· 22 km deep · released about 6.8 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Washington County 23 kmClark County 31 kmColumbia County 34 kmMultnomah County 38 kmCowlitz County 59 kmYamhill County 60 kmTillamook County 74 kmClatsop County 76 kmClackamas County 78 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
22 km below the surface
Felt
no reports yet
Nearest
Washington County, 23 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 249 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 45.6797, -122.8632. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Washington County, OR 23 km (14 mi) NE of here earthquakes near Washington County
Clark County, WA 31 km (19 mi) WSW of here earthquakes near Clark County
Columbia County, OR 34 km (21 mi) SSE of here earthquakes near Columbia County
Multnomah County, OR 38 km (23 mi) WNW of here earthquakes near Multnomah County
Cowlitz County, WA 59 km (37 mi) SSW of here earthquakes near Cowlitz County
Yamhill County, OR 60 km (37 mi) NE of here earthquakes near Yamhill County

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

Aftershocks so far

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

  1. 1.5 5 km NNW of Venersborg, Washington
  2. 2.0 10 km SSE of Scappoose, Oregon
  3. 1.6 5 km WSW of Yacolt, Washington
  4. 1.8 4 km WSW of Yacolt, Washington
  5. 2.1 4 km W of Yacolt, Washington
  6. 1.6 8 km SW of Vernonia, Oregon
  7. 1.8 3 km E of Kalama, Washington
  8. 1.5 3 km WSW of Kalama, Washington
  9. 1.6 2 km NE of Lewisville, Washington
  10. 2.1 4 km WSW of Yacolt, Washington
  11. 1.9 1 km SE of Vancouver, Washington
  12. 1.6 5 km SSW of Yacolt, Washington
  13. 1.9 21 km W of Forest Grove, Oregon
  14. 1.6 4 km NNE of Kalama, Washington
  15. 1.5 2 km SSW of Yacolt, Washington

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.