QuakeIndex

explosion · reviewed by a seismologist

M 1.6ml

23 km ESE of Tillamook, Oregon

· -0.7 km deep · released about 6.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tillamook County 17 kmYamhill County 26 kmWashington County 39 kmPolk County 58 kmClatsop County 69 kmColumbia County 70 kmLincoln County 90 kmMultnomah County 90 kmClark County 92 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
-0.7 km below the surface
Felt
no reports yet
Nearest
Tillamook County, 17 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1040 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 45.4107, -123.5555. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tillamook County, OR 17 km (10 mi) ESE of here earthquakes near Tillamook County
Yamhill County, OR 26 km (16 mi) NW of here earthquakes near Yamhill County
Washington County, OR 39 km (24 mi) WSW of here earthquakes near Washington County
Polk County, OR 58 km (36 mi) NNW of here earthquakes near Polk County
Clatsop County, OR 69 km (43 mi) S of here earthquakes near Clatsop County
Columbia County, OR 70 km (43 mi) SSW of here earthquakes near Columbia County

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

Aftershocks so far

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

  1. 1.9 21 km W of Forest Grove, Oregon
  2. 2.0 7 km WNW of McMinnville, Oregon
  3. 2.0 2 km WNW of Dundee, Oregon
  4. 1.6 15 km ESE of Wheeler, Oregon
  5. 1.9 7 km S of Dayton, Oregon
  6. 1.6 9 km E of Wheeler, Oregon
  7. 2.2 10 km W of Cape Meares, Oregon
  8. 1.6 2 km SW of Oceanside, Oregon
  9. 1.7 8 km SW of Vernonia, Oregon
  10. 2.1 4 km NE of Lafayette, Oregon
  11. 1.5 2 km NW of Sheridan, Oregon
  12. 1.6 24 km NNW of Sheridan, Oregon
  13. 1.7 2 km E of Amity, Oregon
  14. 3.2 5 km SE of Amity, Oregon
  15. 1.6 6 km S of Dayton, 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.