QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

0 km N of Tigard, Oregon

· 21 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Washington County 28 kmMultnomah County 30 kmClark County 43 kmYamhill County 48 kmClackamas County 55 kmColumbia County 61 kmMarion County 62 kmTillamook County 77 kmPolk County 77 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 1.5 (ml)
Depth
21 km below the surface
Felt
no reports yet
Nearest
Washington County, 28 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1957 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 5.4 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 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 45.4388, -122.7723. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Washington County, OR 28 km (18 mi) ESE of here earthquakes near Washington County
Multnomah County, OR 30 km (19 mi) WSW of here earthquakes near Multnomah County
Clark County, WA 43 km (27 mi) SSW of here earthquakes near Clark County
Yamhill County, OR 48 km (30 mi) ENE of here earthquakes near Yamhill County
Clackamas County, OR 55 km (34 mi) NW of here earthquakes near Clackamas County
Columbia County, OR 61 km (38 mi) SSE of here earthquakes near Columbia County

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

Aftershocks so far

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

  1. 1.7 6 km ESE of Molalla, Oregon
  2. 1.8 8 km S of Scappoose, Oregon
  3. 1.8 3 km WNW of Saint Helens, Oregon
  4. 1.7 8 km SE of Molalla, Oregon
  5. 1.6 3 km ESE of Sherwood, Oregon
  6. 2.0 2 km WNW of Molalla, Oregon
  7. 1.6 3 km E of Battle Ground, Washington
  8. 1.9 3 km NNE of Hubbard, Oregon
  9. 1.7 Washington-Oregon border region
  10. 1.7 5 km SSW of Saint Paul, Oregon
  11. 1.5 7 km ESE of Estacada, Oregon
  12. 1.7 8 km E of Molalla, Oregon
  13. 1.6 8 km SW of Aloha, Oregon
  14. 1.6 5 km E of Hubbard, Oregon
  15. 1.7 4 km ENE of Lewisville, 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.