Strong mag. 6.7 earthquake - Gulf of Alaska, 21 mi southeast of Ugaiushak Island, Lake and Peninsula County, Alaska, USA, on Thursday, May 28, 2015 21:00:09

Strong mag. 6.7 earthquake  - Gulf of Alaska, 21 mi southeast of Ugaiushak Island, Lake and Peninsula County, Alaska, USA, on Thursday, May 28, 2015 21:00:09

Strong magnitude 6.7 earthquake at 56 km depth

29 May 07:05 UTC: First to report: USGS after 5 minutes.
May 29 09:10: Magnitude recalculated from 7.0 to 6.7.
Hypocenter depth recalculated from 51.0 to 55.6 km.
Date & time: 29 May 2015 07:00:09 UTC
Local time at epicenter: Thursday, May 28, 2015 21:00:09
Magnitude: 6.7
Depth: 55.6 km
Epicenter latitude / longitude: 56.5885°N / 156.4354°W (Gulf of Alaska, Alaska, United States)
Nearest volcano: Yantarni (62 km / 39 mi)
Nearby towns and cities:
118 km (73 mi) SSE of Ugashik (pop: 12) --> See nearby quakes!
125 km (78 mi) ENE of Chignik (pop: 87) --> See nearby quakes!
277 km (172 mi) WSW of Kodiak (pop: 6,250) --> See nearby quakes!
289 km (179 mi) ENE of Sand Point (pop: 1,060) --> See nearby quakes!
445 km (276 mi) SW of Homer (pop: 5,520) --> See nearby quakes!
520 km (323 mi) SW of Kalifornsky (pop: 7,850) --> See nearby quakes!
533 km (331 mi) SW of Kenai (pop: 7,660) --> See nearby quakes!
548 km (341 mi) SW of Sterling (pop: 5,620) --> See nearby quakes!
5886 km (3657 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
5886 km (3657 mi) NW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
34 km (21 mi) SE of Ugaiushak Island --> See nearby quakes!
200 km (124 mi) WSW of Kodiak Island (pop: 13,600) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 7.1 x 1014 joules (197 gigawatt hours, equivalent to 1.7 x 105 tons of TNT or 10.6 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.
MagnitudeDepthLocationSource
M 6.756 km111km NNW of Chirikof Island, AlaskaUSGS
M 6.864 kmAlaska PeninsulaGFZ
M 6.860 km ALASKA PENINSULAEMSC
M 6.756 kmNNW of Chirikof Island AlaskaGeoAu

User reports for this quake (8)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Dillingham / Severe shaking (MMI VIII)
kodiak near uscg base (636.9 km NNE of epicenter) [Map] / Light shaking (MMI IV) : It perplexed me at first because my houseplants were moving and the baseboard heaters were vibrating. I noticed the power line from the pole to the house was moving & no wind so immediately checked the website to see if something might be happening in the area. Thank you for the prompt information.
Anchorage / Strong shaking (MMI VI)
Kodiak / Light shaking (MMI IV) : at desk, felt rattling underneath floor. noticed plants swaying.
Homer / Very weak shaking (MMI II)
anchorage, ak (631.1 km NE of epicenter) [Map] / Light shaking (MMI IV)
anchorage, ak (631.1 km NE of epicenter) [Map] / Light shaking (MMI IV)
Aloha (United States, 2644 km SE of epicenter) : i heard the same growl i often hear during nearby quakes. shaking less than one minute in duration. presumably an aftershock? starting again right now, shaking again, very slight. it feels like i am sitting on a vibrating chair, a massage chair. (reported through EMSC)
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Aftershocks of the 6.7 quake Gulf of Alaska, 21 mi southeast of Ugaiushak Island, Lake and Peninsula County, Alaska, USA, Thursday, May 28, 2015 21:00:09

More info
Recorded aftershocks, latest first (78 quakes):
  • 19 Nov 2015 20:20 UTC
    | M 3.1 |
    40.3 km (25 mi) depth
    |
    122 km (76 mi) distance
    | USGS | Details
  • 18 Nov 2015 14:46 UTC
    | M 2.9 |
    83.4 km (51.8 mi) depth
    |
    5 km (3 mi) distance
    | USGS | Details
  • 10 Nov 2015 03:43 UTC
    | M 2.8 |
    75 km (46.6 mi) depth
    |
    45 km (28 mi) distance
    | USGS | Details
  • 09 Nov 2015 10:34 UTC
    | M 3.3 |
    100 km (62.1 mi) depth
    |
    108 km (67 mi) distance
    | USGS | Details
  • 03 Nov 2015 06:56 UTC
    | M 2.7 |
    0.1 km (0.1 mi) depth
    |
    104 km (65 mi) distance
    | USGS | Details
  • 31 Oct 2015 10:45 UTC
    | M 3.4 |
    5.8 km (3.6 mi) depth
    |
    66 km (41 mi) distance
    | USGS | Details
  • 29 Oct 2015 20:12 UTC
    | M 2.8 |
    72.6 km (45.1 mi) depth
    |
    122 km (76 mi) distance
    | USGS | Details
  • 17 Oct 2015 07:33 UTC
    | M 2.4 |
    46.1 km (28.6 mi) depth
    |
    133 km (82 mi) distance
    | USGS | Details
  • 13 Oct 2015 15:04 UTC
    | M 2.9 |
    12.4 km (7.7 mi) depth
    |
    69 km (43 mi) distance
    | USGS | Details
  • 13 Oct 2015 04:14 UTC
    | M 2.8 |
    9.4 km (5.8 mi) depth
    |
    68 km (42 mi) distance
    | USGS | Details
  • 10 Oct 2015 14:34 UTC
    | M 3.9 |
    38.1 km (23.7 mi) depth
    |
    55 km (34 mi) distance
    | USGS | Details
  • 08 Oct 2015 04:35 UTC
    | M 3.4 |
    9.2 km (5.7 mi) depth
    |
    125 km (78 mi) distance
    | USGS | Details
  • 07 Oct 2015 12:46 UTC
    | M 2.5 |
    36.1 km (22.4 mi) depth
    |
    129 km (80 mi) distance
    | USGS | Details
  • 06 Oct 2015 18:36 UTC
    | M 2.4 |
    3.7 km (2.3 mi) depth
    |
    117 km (73 mi) distance
    | USGS | Details
  • 06 Oct 2015 00:08 UTC
    | M 3.9 |
    11.8 km (7.3 mi) depth
    |
    61 km (38 mi) distance
    | USGS | Details
  • 04 Oct 2015 12:09 UTC
    | M 3.1 |
    72.5 km (45 mi) depth
    |
    9 km (6 mi) distance
    | USGS | Details
  • Show all

Earlier earthquakes in the same area

Strong mag. 6.7 earthquake - Gulf of Alaska, 21 mi southeast of Ugaiushak Island, Lake and Peninsula County, Alaska, USA, on Thursday, May 28, 2015 21:00:09
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