QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

31 km ESE of Island Park, Idaho

· 7.6 km deep · released about 5.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Fremont County 42 kmTeton County 57 kmTeton County 69 kmMadison County 83 kmClark County 109 kmPark County 112 kmBonneville County 118 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 1.5 (ml)
Depth
7.6 km below the surface
Felt
no reports yet
Nearest
Fremont County, 42 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2911 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 5.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 44.3585, -110.9920. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fremont County, ID 42 km (26 mi) ENE of here earthquakes near Fremont County
Teton County, WY 57 km (35 mi) NW of here earthquakes near Teton County
Teton County, ID 69 km (43 mi) NNE of here earthquakes near Teton County
Madison County, ID 83 km (51 mi) NE of here earthquakes near Madison County
Clark County, ID 109 km (68 mi) E of here earthquakes near Clark County
Park County, WY 112 km (70 mi) W of here earthquakes near Park County

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

Aftershocks so far

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

  1. 1.8 12 km E of Hebgen Lake Estates, Montana
  2. 1.6 48 km SSE of Mammoth, Wyoming
  3. 2.8 48 km SSE of Mammoth, Wyoming
  4. 2.6 47 km SSE of Mammoth, Wyoming
  5. 1.5 48 km SSE of Mammoth, Wyoming
  6. 1.6 Wyoming
  7. 2.0 47 km SSE of Mammoth, Wyoming
  8. 2.0 47 km SSE of Mammoth, Wyoming
  9. 2.4 48 km SSE of Mammoth, Wyoming
  10. 1.6 48 km SSE of Mammoth, Wyoming
  11. 2.3 47 km SSE of Mammoth, Wyoming
  12. 1.9 48 km SSE of Mammoth, Wyoming
  13. 2.0 47 km SSE of Mammoth, Wyoming
  14. 2.0 48 km SSE of Mammoth, Wyoming
  15. 2.2 47 km SSE of Mammoth, Wyoming

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 2017-06-16 — it released about 19,000 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.