Strong mag. 6.0 earthquake - 118km SE of Cold Bay, Alaska on Monday, 31 December 2018 - information

Strong mag. 6.0 earthquake - Gulf of Alaska, 39 mi southeast of Cherni Island, Aleutians East, Alaska, USA, on 2018-12-30 15:35:37 -11:00

Strong mag. 6.0 earthquake - Gulf of Alaska, 39 mi southeast of Cherni Island, Aleutians East, Alaska, USA, on 2018-12-30 15:35:37 -11:00

Strong magnitude 6.0 earthquake at 31 km depth

31 Dec 02:41 UTC: First to report: USGS after 6 minutes.
Dec 31 02:50: Magnitude recalculated from 5.8 to 5.5.
Hypocenter depth recalculated from 34.0 to 26.3 km.
Dec 31 03:01: Magnitude recalculated from 5.5 to 6.1.
Hypocenter depth recalculated from 26.3 to 26.9 km.
Dec 31 23:56: Magnitude recalculated from 6.1 to 6.0.
Hypocenter depth recalculated from 26.9 to 31.0 km.
Date & time: Dec 31, 2018 02:35:37 UTC
Local time at epicenter: 2018-12-30 15:35:37 -11:00
Magnitude: 6
Depth: 31.0 km
Epicenter latitude / longitude: 54.3874°N / 161.5066°W (Gulf of Alaska, Alaska, United States)
Antipode: 54.387°S / 18.493°E
Nearest volcano: Dutton (115 km / 71 mi)
Nearby towns and cities:
91 km (57 mi) SE of King Cove (pop: 1,010) --> See nearby quakes!
118 km (73 mi) SE of Cold Bay (pop: 123) --> See nearby quakes!
124 km (77 mi) SSW of Sandpoint (pop: 1,060) --> See nearby quakes!
133 km (83 mi) ESE of False Pass (pop: 40) --> See nearby quakes!
180 km (112 mi) S of Nelson Lagoon (pop: 52) --> See nearby quakes!
226 km (141 mi) SW of Perryville (pop: 113) --> See nearby quakes!
271 km (168 mi) SW of Chignik Lake (pop: 73) --> See nearby quakes!
279 km (173 mi) E of Akutan (pop: 1,040) --> See nearby quakes!
333 km (207 mi) ENE of Unalaska (pop: 4,490) --> See nearby quakes!
333 km (207 mi) ENE of Dutch Harbor (pop: 4,380) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 6.3 x 1013 joules (17.5 gigawatt hours, equivalent to 15080 tons of TNT or 0.9 atomic bombs!) More info
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
Mag.DepthLocationSource
6.031 km- 118km SE of Cold Bay, AlaskaUSGS
6.010 kmAlaska PeninsulaGFZ
6.147 km ALASKA PENINSULAEMSC
6.029 kmAlaska PeninsulaGeoAu
6.134 kmAlaska Peninsula, United States [Sea: United States]INGV

User reports for this quake (10)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Southwest Anchorage, AK (1015.5 km NE of epicenter) [Map] / not felt : I didn’t feel this one luckily. I already had quite the day experiencing the 7.1 Anchorage main shock and its aftershocks.  
Wasilla / Strong shaking (MMI VI)
Anchorage, AK (1026.9 km NE of epicenter) [Map] / Light shaking (MMI IV) : Moderate, quick shake. (reported through our app)  
Kenai / Weak shaking (MMI III)
Mayne Island / Very weak shaking (MMI II) : Disregard previous report. I misread the time.  
Talkeetna / Weak shaking (MMI III)
99507 / Light shaking (MMI IV)
Eagle River, Anchorage, Alaska (1045.7 km NE of epicenter) [Map] / Weak shaking (MMI III) (reported through our app)
Anchorage (1020.8 km NE of epicenter) [Map] / Very weak shaking (MMI II) (reported through our app)
unspecified (226 km NE of epicenter) [Map] / Light shaking (MMI IV) (reported through our app)
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Aftershocks

More info

Recorded aftershocks, latest first (11 quakes)

  • 29 May 2019 08:09 UTC
    | M 2.5 |
    3.9 km (2.4 mi) depth
    |
    30 km (19 mi) distance
    | USGS | Details
  • 29 Apr 2019 02:31 UTC
    | M 3.6 |
    35 km (21.7 mi) depth
    |
    22 km (13 mi) distance
    | USGS | Details
  • 20 Apr 2019 22:32 UTC
    | M 3.9 |
    41.2 km (25.6 mi) depth
    |
    23 km (14 mi) distance
    | USGS | Details
  • 08 Apr 2019 00:01 UTC
    | M 4.4 |
    35 km (21.7 mi) depth
    |
    29 km (18 mi) distance
    | USGS | Details
  • 03 Apr 2019 13:00 UTC
    | M 3.1 |
    35 km (21.7 mi) depth
    |
    14 km (9 mi) distance
    | USGS | Details
  • 13 Mar 2019 18:00 UTC
    | M 3.8 |
    9.8 km (6.1 mi) depth
    |
    37 km (23 mi) distance
    | USGS | Details
  • 08 Mar 2019 23:14 UTC
    | M 2.7 |
    21.5 km (13.4 mi) depth
    |
    14 km (8 mi) distance
    | USGS | Details
  • 04 Mar 2019 04:51 UTC
    | M 4.4 |
    44.1 km (27.4 mi) depth
    |
    53 km (33 mi) distance
    | USGS | Details
  • 16 Feb 2019 23:09 UTC
    | M 3.6 |
    46.7 km (29 mi) depth
    |
    21 km (13 mi) distance
    | USGS | Details
  • 14 Jan 2019 04:02 UTC
    | M 3.3 |
    7.6 km (4.7 mi) depth
    |
    11 km (7 mi) distance
    | USGS | Details
  • 04 Jan 2019 13:27 UTC
    | M 3.3 |
    24.9 km (15.5 mi) depth
    |
    10 km (6 mi) distance
    | USGS | Details

Earlier earthquakes in the same area

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