Moderate mag. 5.0 earthquake - Gulf of Alaska, 105 mi east of Sand Point, Aleutians East County, Alaska, USA, on Tuesday, 18 August 2020 at 18:28 (GMT) -

This quake was likely an aftershock of the 7.8 quake Gulf of Alaska, 31 mi east of Simeonof Island, Aleutians East County, Alaska, USA, 22 July 2020 06:12 GMT, which had occurred 4 semaines earlier.
Moderate mag. 5.0 earthquake - Gulf of Alaska, 105 mi east of Sand Point, Aleutians East County, Alaska, USA, on Tuesday, 18 August 2020 at 18:28 (GMT)

Séisme modéré magnitude 5.0 at 42 km depth

18 Aug 18:35 UTC: Premier à signaler: USGS après 7 minutes.
Aug 18 18:43: Magnitude recalculée de 5.0 à 5.1.
Profondeur recalculée de 40.0 à 30.6 km.
Aug 18 19:13: Magnitude recalculée de 5.1 à 5.0.
Profondeur recalculée de 30.6 à 44.7 km.
Profondeur recalculée de 44.7 à 41.5 km.
Date & time: 18 Aug 2020 18:28:33 UTC -
Magnitude: 5
Profondeur: 41.5 km
Epicenter latitude / longitude: 55.0003°N / 157.9167°W (Gulf of Alaska, Alaska, États-Unis)
Volcan le plus près: Veniaminof (156 km / 97 mi)
Nearby towns and cities:
128 km SE de Perryville (pop: 113) --> Voir les séismes à proximité!
149 km SSE de Chignik Lake (pop: 73) --> Voir les séismes à proximité!
151 km SSE de Chignik Lagoon (pop: 78) --> Voir les séismes à proximité!
168 km E de Sand Point (pop: 1,060) --> Voir les séismes à proximité!
221 km SSE de Port Heiden (pop: 98) --> Voir les séismes à proximité!
235 km ESE de Nelson Lagoon (pop: 52) --> Voir les séismes à proximité!
281 km E de King Cove (pop: 1,010) --> Voir les séismes à proximité!
440 km SO de Womens Bay (pop: 719) --> Voir les séismes à proximité!
449 km SO de Kodiak Station (pop: 1,300) --> Voir les séismes à proximité!
459 km SO de Kodiak (pop: 6,250) --> Voir les séismes à proximité!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2 x 1012 joules (554 megawatt hours, equivalent to 477 tons of TNT) More info
Show interactive Map
[smaller] [bigger]
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.
MagnitudeProfondeurLocationSource
M 5.042 km127 km SE of Perryville, Alaska (USA)USGS
M 5.029 kmAlaska Peninsula (USA)GFZ
M 5.115 kmAlaska Peninsula (USA)EMSC
M 5.35 kmAlaska Peninsula (USA)GeoAu

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake yet. If you felt it be the first to report it!
Volcanoes & Earthquakes - new app for Android

Earlier earthquakes in the same area since 1900


Map of earlier quakes

Volcanoes & Earthquakes - new app for Android
Why is there advertising on this site?
Support us - Help us upgrade our services!
We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:
  • Weather reports
  • Tsunami alerts
  • Design upgrades
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Additional seismic data sources
  • Improved content in English
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Copyright: VolcanoDiscovery ou autres sources indiquées.
Utilisation des documents: Les textes, les images et les vidéos de ce site internet sont protégées par copyright. Toute reproduction et tout usage sans accord préalable ne sont pas autorisés. Si vous désirez acquérir pour certains documents (photos, vidéos, textes ou autres) le droit de reproduction, d'édition et, plus généralement, de toute utilisation destinée à un usage public, qu'elle soit commerciale ou pas, vous êtes priés de nous contacter.