QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

5 km WSW of Portage, Utah

· 8.7 km deep · released about 12 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Oneida County 31 kmFranklin County 46 kmCache County 52 kmBox Elder County 73 kmBannock County 82 kmWeber County 84 kmBear Lake County 88 kmPower County 93 kmRich County 95 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
8.7 km below the surface
Felt
no reports yet
Nearest
Oneida County, 31 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 531 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 12 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 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 900,000× the energy of this one
  3. Around the size people start to feel M 3.0 80× the energy of this one
  4. This earthquake M 1.7 about 12 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 41.9570, -112.2978. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Oneida County, ID 31 km (19 mi) SE of here earthquakes near Oneida County
Franklin County, ID 46 km (29 mi) WSW of here earthquakes near Franklin County
Cache County, UT 52 km (32 mi) WNW of here earthquakes near Cache County
Box Elder County, UT 73 km (46 mi) ENE of here earthquakes near Box Elder County
Bannock County, ID 82 km (51 mi) S of here earthquakes near Bannock County
Weber County, UT 84 km (52 mi) NNW of here earthquakes near Weber County

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

Aftershocks so far

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

  1. 2.0 12 km NNE of Howell, Utah
  2. 2.5 25 km NNW of Snowville, Utah
  3. 2.3 26 km NNW of Snowville, Utah
  4. 1.6 2 km E of Malad City, Idaho
  5. 2.0 2 km ESE of Malad City, Idaho
  6. 1.7 4 km NE of Malad City, Idaho
  7. 2.4 2 km E of Malad City, Idaho
  8. 1.5 3 km ENE of Malad City, Idaho
  9. 1.6 3 km E of Malad City, Idaho
  10. 2.6 2 km ESE of Malad City, Idaho
  11. 1.8 2 km ESE of Malad City, Idaho
  12. 2.4 2 km ESE of Malad City, Idaho
  13. 1.6 3 km ESE of Malad City, Idaho
  14. 1.6 2 km ESE of Malad City, Idaho
  15. 1.6 2 km ESE of Malad City, Idaho

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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2024-05-05 — it released about 9,100 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.