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Moderate mag. 5.7 earthquake - Unimak Island region, Alaska (USA) on Thursday, 13 August 2020

Moderate mag. 5.7 earthquake  - Unimak Island region, Alaska (USA) on Thursday, 13 August 2020
13 Aug 06:45 UTC: Premier à signaler: USGS après 5 minutes.
Aug 13 06:56: Magnitude recalculée de 5.4 à 5.6.
Profondeur recalculée de 64.0 à 12.7 km.
Aug 13 16:38: Magnitude recalculée de 5.6 à 5.7.
Profondeur recalculée de 12.7 à 10.4 km.
Date & time: Thursday, 13 August 2020 06:39 UTC
Magnitude: 5.7
Depth: 10.4 km
Epicenter latitude / longitude: 53.42°N / 163.6973°W (Alaska, États-Unis)
Nearest volcano: Westdahl (148 km / 92 mi)
Nearby towns and cities:
158 km SE de Akutan (pop: 1000)
161 km S de False Pass (pop: 0)
194 km SE de Unalaska (pop: 4,500)
195 km SE de Dutch Harbor (pop: 4,400)
Primary data source: USGS
Estimated released energy: 2.2 x 1013 joules (6.22 gigawatt hours, equivalent to 5351 tons of TNT or 0.3 atomic bombs!) [learn more]
If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

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.
HeureMag. / DepthLocationSource
Thu, 13 Aug 06:39 UTCM 5.7 / 10.4 kmUnimak Island region, Alaska (USA)USGS
Thu, 13 Aug 06:40 UTCM 5.6 / 26 kmUnimak Island Region, Alaska (USA)GFZ
Thu, 13 Aug 06:39 UTCM 5.7 / 10 kmUnimak Island Region, Alaska (USA)EMSC
Thu, 13 Aug 06:39 UTCM 5.7 / 10 kmUnimak Island Region, Alaska (USA)BMKG
Thu, 13 Aug 06:40 UTCM 5.4 / 27.8 kmUnimak Island Region, Alaska (USA)GeoAu

User reports for this quake (1)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Westchester, NY / not felt

Aftershocks of the 5.7 quake: Unimak Island region, Alaska (USA), 13 Aug 2020 06:39

More info
Recorded aftershocks, latest first (10 quakes):
  • 21 Sep 2020 02:51 UTC
    | M 3.0 |
    38.9 km (24.2 mi) depth
    |
    12 km (8 mi) distance
    | USGS | Details
  • 09 Sep 2020 08:01 UTC
    | M 2.2 |
    41.4 km (25.7 mi) depth
    |
    24 km (15 mi) distance
    | USGS | Details
  • 23 Aug 2020 22:40 UTC
    | M 4.5 |
    35 km (21.7 mi) depth
    |
    16 km (10 mi) distance
    | USGS | Details
  • 15 Aug 2020 14:35 UTC
    | M 2.2 |
    63.3 km (39.3 mi) depth
    |
    17 km (11 mi) distance
    | USGS | Details
  • 15 Aug 2020 08:38 UTC
    | M 4.0 |
    10 km (6.2 mi) depth
    |
    16 km (10 mi) distance
    | USGS | Details
  • 15 Aug 2020 04:12 UTC
    | M 3.7 |
    35 km (21.7 mi) depth
    |
    26 km (16 mi) distance
    | USGS | Details
  • 13 Aug 2020 07:52 UTC
    | M 3.6 |
    10 km (6.2 mi) depth
    |
    34 km (21 mi) distance
    | USGS | Details
  • 13 Aug 2020 07:27 UTC
    | M 3.0 |
    26.4 km (16.4 mi) depth
    |
    4 km (2 mi) distance
    | USGS | Details
  • 13 Aug 2020 07:01 UTC
    | M 3.2 |
    25.3 km (15.7 mi) depth
    |
    5 km (3 mi) distance
    | USGS | Details
  • 13 Aug 2020 06:59 UTC
    | M 2.8 |
    9.8 km (6.1 mi) depth
    |
    8 km (5 mi) distance
    | USGS | Details

Earlier earthquakes in the same area

Moderate mag. 5.7 earthquake - Unimak Island region, Alaska (USA) on Thursday, 13 August 2020

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