QuakeIndex

explosion · reviewed by a seismologist

M 1.6ml

3 km S of Fort Hill Census Designated Place, Oregon

· -0.3 km deep · released about 8.1 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Polk County 19 kmYamhill County 30 kmTillamook County 50 kmLincoln County 52 kmBenton County 61 kmWashington County 68 kmMarion County 78 kmLinn County 100 kmMultnomah County 105 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
-0.3 km below the surface
Felt
no reports yet
Nearest
Polk County, 19 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1452 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 8.1 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 1,900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,300,000× the energy of this one
  3. Around the size people start to feel M 3.0 120× the energy of this one
  4. This earthquake M 1.6 about 8.1 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 45.0317, -123.5485. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Polk County, OR 19 km (12 mi) NW of here earthquakes near Polk County
Yamhill County, OR 30 km (19 mi) SW of here earthquakes near Yamhill County
Tillamook County, OR 50 km (31 mi) SSE of here earthquakes near Tillamook County
Lincoln County, OR 52 km (32 mi) NNE of here earthquakes near Lincoln County
Benton County, OR 61 km (38 mi) N of here earthquakes near Benton County
Washington County, OR 68 km (42 mi) SSW of here earthquakes near Washington County

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

Aftershocks so far

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

  1. 1.6 7 km NNW of Philomath, Oregon
  2. 1.6 16 km WNW of McMinnville, Oregon
  3. 1.7 1 km W of Siletz, Oregon
  4. 1.7 4 km ENE of Lafayette, Oregon
  5. 1.9 6 km SSW of Falls City, Oregon
  6. 1.7 5 km SE of Rose Lodge, Oregon
  7. 2.0 4 km NNE of Lafayette, Oregon
  8. 2.0 10 km E of Lincoln Beach, Oregon
  9. 1.8 6 km NNE of Falls City, Oregon
  10. 1.7 13 km N of Summit, Oregon
  11. 2.3 1 km NNE of Lincoln Beach, Oregon
  12. 2.0 0 km NE of Rose Lodge, Oregon
  13. 1.7 10 km SSW of Netarts, Oregon
  14. 1.6 15 km SSE of Rose Lodge, Oregon
  15. 1.8 9 km ESE of Rose Lodge, 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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