QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

4 km NW of North Portland, Oregon

· 19 km deep · released about 5.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Clark County 25 kmMultnomah County 28 kmWashington County 29 kmColumbia County 43 kmYamhill County 62 kmCowlitz County 63 kmClackamas County 68 kmSkamania County 75 kmTillamook County 81 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
19 km below the surface
Felt
no reports yet
Nearest
Clark County, 25 km NE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 569 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 5.7 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 2,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.7 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 45.6362, -122.7498. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Clark County, WA 25 km (16 mi) SW of here earthquakes near Clark County
Multnomah County, OR 28 km (17 mi) WNW of here earthquakes near Multnomah County
Washington County, OR 29 km (18 mi) ENE of here earthquakes near Washington County
Columbia County, OR 43 km (26 mi) SE of here earthquakes near Columbia County
Yamhill County, OR 62 km (38 mi) NE of here earthquakes near Yamhill County
Cowlitz County, WA 63 km (39 mi) S of here earthquakes near Cowlitz County

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

Aftershocks so far

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

  1. 1.5 7 km ENE of Prescott, Oregon
  2. 2.8 6 km SW of Aloha, Oregon
  3. 1.6 1 km SSE of King City, Oregon
  4. 2.0 4 km SE of Mill Plain, Washington
  5. 1.6 4 km NNW of Lewisville, Washington
  6. 2.6 3 km SE of Mill Plain, Washington
  7. 1.6 9 km NE of Vernonia, Oregon
  8. 1.7 1 km WSW of Kalama, Washington
  9. 1.6 2 km ESE of Lewisville, Washington
  10. 1.7 2 km WSW of Columbia City, Oregon
  11. 1.5 2 km SSE of Lewisville, Washington
  12. 2.0 1 km NNW of Salmon Creek, Washington
  13. 1.6 Washington-Oregon border region
  14. 1.7 12 km NE of Vernonia, Oregon
  15. 1.5 13 km ENE of Vernonia, 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.