QuakeIndex

explosion · reviewed by a seismologist

M 1.6ml

7 km SSW of Dayton, Oregon

· -0.2 km deep · released about 8.7 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yamhill County 18 kmPolk County 36 kmWashington County 44 kmMarion County 52 kmTillamook County 59 kmMultnomah County 70 kmClackamas County 73 kmBenton County 78 kmClark County 84 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
-0.2 km below the surface
Felt
no reports yet
Nearest
Yamhill County, 18 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 564 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 8.7 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 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.7 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 45.1623, -123.1278. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yamhill County, OR 18 km (11 mi) ESE of here earthquakes near Yamhill County
Polk County, OR 36 km (22 mi) NE of here earthquakes near Polk County
Washington County, OR 44 km (27 mi) S of here earthquakes near Washington County
Marion County, OR 52 km (32 mi) NW of here earthquakes near Marion County
Tillamook County, OR 59 km (37 mi) ESE of here earthquakes near Tillamook County
Multnomah County, OR 70 km (44 mi) SW of here earthquakes near Multnomah 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. 1.5 4 km SSW of Aloha, Oregon
  2. 2.0 4 km N of Newberg, Oregon
  3. 1.7 4 km NE of Lafayette, Oregon
  4. 1.5 2 km WSW of Stafford, Oregon
  5. 1.7 9 km SSW of Saint Paul, Oregon
  6. 1.6 5 km W of Dallas, Oregon
  7. 1.6 16 km WNW of McMinnville, Oregon
  8. 1.7 4 km ENE of Lafayette, Oregon
  9. 1.9 6 km SSW of Falls City, Oregon
  10. 2.0 4 km NNE of Lafayette, Oregon
  11. 1.7 11 km SE of Silverton, Oregon
  12. 1.8 6 km NNE of Falls City, Oregon
  13. 1.6 3 km E of Sherwood, Oregon
  14. 1.8 3 km WNW of Mulino, Oregon
  15. 1.6 4 km NE of Lafayette, 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.