QuakeIndex

explosion · reviewed by a seismologist

M 1.7ml

9 km SE of Amity, Oregon

· -0.2 km deep · released about 9.3 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Yamhill County 26 kmPolk County 29 kmMarion County 46 kmWashington County 54 kmTillamook County 67 kmBenton County 68 kmClackamas County 72 kmMultnomah County 76 kmLinn 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 1.7 (ml)
Depth
-0.2 km below the surface
Felt
no reports yet
Nearest
Yamhill County, 26 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 825 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 9.3 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 100× the energy of this one
  4. This earthquake M 1.7 about 9.3 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 45.0642, -123.1088. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Yamhill County, OR 26 km (16 mi) SE of here earthquakes near Yamhill County
Polk County, OR 29 km (18 mi) NE of here earthquakes near Polk County
Marion County, OR 46 km (28 mi) WNW of here earthquakes near Marion County
Washington County, OR 54 km (34 mi) S of here earthquakes near Washington County
Tillamook County, OR 67 km (42 mi) SE of here earthquakes near Tillamook County
Benton County, OR 68 km (42 mi) NNE of here earthquakes near Benton County

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

Aftershocks so far

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

  1. 2.0 7 km WNW of McMinnville, Oregon
  2. 1.5 5 km WNW of King City, Oregon
  3. 1.7 7 km ESE of Amity, Oregon
  4. 2.0 2 km WNW of Dundee, Oregon
  5. 1.7 8 km S of Molalla, Oregon
  6. 1.9 7 km S of Dayton, Oregon
  7. 1.6 2 km WSW of Stafford, Oregon
  8. 1.6 4 km NE of Falls City, Oregon
  9. 1.8 4 km SSE of Stafford, 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. 1.8 8 km W of Falls City, Oregon
  14. 1.7 2 km E of Amity, Oregon
  15. 3.2 5 km SE of Amity, 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

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