QuakeIndex

explosion · reviewed by a seismologist

M 1.6ml

3 km SE of Sherwood, Oregon

· -0.2 km deep · released about 6.6 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Washington County 33 kmMultnomah County 38 kmYamhill County 41 kmClackamas County 52 kmMarion County 52 kmClark County 54 kmPolk County 67 kmColumbia County 71 kmTillamook County 76 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
1 report · strongest reported intensity I
Nearest
Washington County, 33 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 865 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

USGS catalogues this as explosion, not an earthquake.

How big was it?

This earthquake released about 6.6 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 2,300,000× 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 6.6 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 45.3382, -122.8035. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Washington County, OR 33 km (21 mi) SE of here earthquakes near Washington County
Multnomah County, OR 38 km (24 mi) SW of here earthquakes near Multnomah County
Yamhill County, OR 41 km (26 mi) ENE of here earthquakes near Yamhill County
Clackamas County, OR 52 km (32 mi) WNW of here earthquakes near Clackamas County
Marion County, OR 52 km (32 mi) NNW of here earthquakes near Marion County
Clark County, WA 54 km (34 mi) SSW of here earthquakes near Clark County

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

Aftershocks so far

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

  1. 2.0 3 km WSW of Dundee, Oregon
  2. 1.5 5 km E of Beavercreek, Oregon
  3. 2.1 7 km ESE of Molalla, Oregon
  4. 2.0 16 km W of Forest Grove, Oregon
  5. 1.5 4 km SSW of Scotts Mills, Oregon
  6. 1.5 1 km SSE of Hubbard, Oregon
  7. 1.8 5 km N of West Haven, Oregon
  8. 1.8 8 km ESE of Scotts Mills, Oregon
  9. 1.7 4 km NNE of Lafayette, Oregon
  10. 1.6 6 km SSE of Molalla, Oregon
  11. 1.6 10 km WSW of Felida, Washington
  12. 1.6 4 km ENE of Lafayette, Oregon
  13. 1.5 4 km SSW of Aloha, Oregon
  14. 2.0 4 km N of Newberg, Oregon
  15. 1.7 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.