QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

Earthquake near Seward, AK

USGS: 11 km ESE of Lowell Point, Alaska

11:11 am AKST, Jan 13, 2019 · · 21 km deep · released about 7.6 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
11:11 am AKST on 13 January 2019 ()
Where
13 km (8 mi) SE of Seward, AK · earthquakes near Seward
Magnitude
M 1.6 (ml)
Depth
21 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2812 days ago

A magnitude 1.6 earthquake was recorded 13 km (8 mi) SE of Seward, AK, at 11:11 am AKST on 13 January 2019 (20:11 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Bear Creek.

How big was it?

This earthquake released about 7.6 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 2,000,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
  3. Around the size people start to feel M 3.0 130× the energy of this one
  4. This earthquake M 1.6 about 7.6 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.

For this area

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists 11 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.6 3 km SW of Bear Creek, Alaska · 17 km NW of this epicentre
  2. 6.3 37 km SSE of Lowell Point, Alaska · 30 km S of this epicentre
  3. 6.1 25 km WSW of Chenega, Alaska · 46 km E of this epicentre
  4. 6.0 54 km SE of Lowell Point, Alaska · 45 km SSE of this epicentre
  5. 5.9 33 km SSE of Lowell Point, Alaska · 25 km S of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 60.0243, -149.2674. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.6 31 km ESE of Lowell Point, Alaska
  2. 1.6 12 km ESE of Lowell Point, Alaska
  3. 1.5 19 km SW of Lowell Point, Alaska
  4. 1.7 13 km NW of Bear Creek, Alaska
  5. 1.7 22 km SW of Lowell Point, Alaska
  6. 2.0 18 km SW of Lowell Point, Alaska
  7. 1.8 39 km ESE of Lowell Point, Alaska
  8. 2.5 2 km NW of Seward, Alaska
  9. 1.6 6 km WSW of Lowell Point, Alaska
  10. 1.5 10 km SSW of Lowell Point, Alaska
  11. 1.5 17 km SE of Primrose, Alaska
  12. 1.5 14 km E of Lowell Point, Alaska
  13. 1.6 53 km SSE of Lowell Point, Alaska
  14. 1.8 50 km SE of Lowell Point, Alaska
  15. 1.5 18 km ESE of Bear Creek, 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.

On USGS

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