QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0ml

246 km SE of Chiniak, Alaska

· 13 km deep · released about 30 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 2.0 (ml)
Depth
13 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2043 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 30 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 350,000× the energy of this one
  3. Around the size people start to feel M 3.0 32× the energy of this one
  4. This earthquake M 2.0 about 30 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 56.1946, -149.1658. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 3.2 274 km SE of Chiniak, Alaska
  2. 3.3 256 km SE of Chiniak, Alaska
  3. 2.5 245 km SE of Chiniak, Alaska
  4. 2.6 247 km SE of Chiniak, Alaska
  5. 2.6 241 km SE of Chiniak, Alaska
  6. 4.7 247 km SE of Chiniak, Alaska
  7. 2.4 239 km SE of Chiniak, Alaska
  8. 2.9 227 km SE of Chiniak, Alaska
  9. 2.9 251 km SE of Chiniak, Alaska
  10. 3.4 237 km SE of Chiniak, Alaska
  11. 2.9 234 km SE of Chiniak, Alaska
  12. 2.8 244 km SE of Chiniak, Alaska
  13. 3.1 261 km SE of Chiniak, Alaska
  14. 2.4 234 km SE of Chiniak, Alaska
  15. 3.1 236 km SE of Chiniak, Alaska

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 7.9 on 2018-01-23 — it released about 710,000,000 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.