QuakeIndex

explosion · reviewed by a seismologist

M 1.6ml

21 km E of Tillamook, Oregon

· -0.1 km deep · released about 6.8 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Tillamook County 15 kmYamhill County 33 kmWashington County 37 kmClatsop County 61 kmColumbia County 63 kmPolk County 66 kmMultnomah County 90 kmClark County 90 kmWahkiakum County 91 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
-0.1 km below the surface
Felt
no reports yet
Nearest
Tillamook County, 15 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2385 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 6.8 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 2,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
  3. Around the size people start to feel M 3.0 140× the energy of this one
  4. This earthquake M 1.6 about 6.8 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 45.4848, -123.5687. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Tillamook County, OR 15 km (9 mi) ENE of here earthquakes near Tillamook County
Yamhill County, OR 33 km (20 mi) NW of here earthquakes near Yamhill County
Washington County, OR 37 km (23 mi) WSW of here earthquakes near Washington County
Clatsop County, OR 61 km (38 mi) S of here earthquakes near Clatsop County
Columbia County, OR 63 km (39 mi) SW of here earthquakes near Columbia County
Polk County, OR 66 km (41 mi) NNW of here earthquakes near Polk County

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

Aftershocks so far

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

  1. 2.1 1 km ESE of Banks, Oregon
  2. 1.5 8 km NNE of Nehalem, Oregon
  3. 1.6 16 km WNW of McMinnville, Oregon
  4. 1.7 4 km ENE of Lafayette, Oregon
  5. 2.0 4 km NNE of Lafayette, Oregon
  6. 1.7 10 km SSW of Netarts, Oregon
  7. 1.6 4 km NE of Lafayette, Oregon
  8. 1.6 3 km SE of Beaver, Oregon
  9. 1.6 17 km WNW of Banks, Oregon
  10. 1.5 5 km ENE of Sheridan, Oregon
  11. 1.6 7 km NE of Amity, Oregon
  12. 1.7 4 km NE of Lafayette, Oregon
  13. 1.5 7 km WNW of Forest Grove, Oregon
  14. 2.0 4 km WSW of Wheeler, Oregon
  15. 1.5 8 km W of Yamhill, 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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