QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

138 km ESE of Haines Junction, Canada

· 6.8 km deep · released about 15 lb of TNT

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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 1.8 (ml)
Depth
6.8 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2138 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 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 710,000× the energy of this one
  3. Around the size people start to feel M 3.0 63× the energy of this one
  4. This earthquake M 1.8 about 15 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 61.1430, -139.9369. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.1 145 km SSE of Alcan Border, Alaska
  2. 1.5 153 km WNW of Haines Junction, Canada
  3. 1.7 140 km WNW of Haines Junction, Canada
  4. 1.9 120 km WNW of Haines Junction, Canada
  5. 1.5 134 km W of Haines Junction, Canada
  6. 1.7 135 km W of Haines Junction, Canada
  7. 1.5 138 km ESE of McCarthy, Alaska
  8. 2.8 139 km ESE of McCarthy, Alaska
  9. 2.2 121 km WNW of Haines Junction, Canada
  10. 2.3 119 km WNW of Haines Junction, Canada
  11. 3.2 122 km WNW of Haines Junction, Canada
  12. 1.9 119 km WNW of Haines Junction, Canada
  13. 2.8 120 km WNW of Haines Junction, Canada
  14. 1.5 124 km WNW of Haines Junction, Canada
  15. 2.0 118 km WNW of Haines Junction, Canada

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 4.0 on 2017-11-05 — it released about 2,000 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.