Minor mag. 2.8 earthquake - Gulf of Alaska, 62 mi east of Port Heiden, Lake and Peninsula, Alaska, USA, on Friday, Sep 17, 2021 4:03 pm (GMT -8) -

This quake was likely an aftershock of the 8.2 quake Chignik Earthquake, Gulf of Alaska, July, 29 2021 06:15 GMT, which had occurred 7 weeks earlier.
Minor mag. 2.8 earthquake - Gulf of Alaska, 62 mi east of Port Heiden, Lake and Peninsula, Alaska, USA, on Friday, Sep 17, 2021 4:03 pm (GMT -8)

Minor magnitude 2.8 earthquake at 41 km depth

18 Sep 00:07 UTC: First to report: USGS after 5 minutes.
Date & time: Sep 18, 2021 00:03:13 UTC -
Local time at epicenter: Friday, Sep 17, 2021 4:03 pm (GMT -8)
Magnitude: 2.8
Depth: 40.6 km
Epicenter latitude / longitude: 56.6994°N / 157.0615°W (Gulf of Alaska, Alaska, United States)
Antipode: 56.699°S / 22.939°E
Nearest volcano: Yantarni (36 km / 22 mi)
Nearby towns and cities:
93 km (58 mi) SSE of Ugashik (pop: 12) --> See nearby quakes!
99 km (62 mi) ESE of Port Heiden (pop: 98) --> See nearby quakes!
100 km (62 mi) ENE of Chignik Lagoon (pop: 78) --> See nearby quakes!
116 km (72 mi) ENE of Chignik Lake (pop: 73) --> See nearby quakes!
156 km (97 mi) NE of Perryville (pop: 113) --> See nearby quakes!
170 km (105 mi) S of Egegik (pop: 106) --> See nearby quakes!
178 km (111 mi) W of Akhiok (pop: 72) --> See nearby quakes!
185 km (115 mi) WSW of Karluk (pop: 37) --> See nearby quakes!
208 km (129 mi) WSW of Larsen Bay (pop: 88) --> See nearby quakes!
Weather at epicenter at time of quake:
Overcast Clouds 10.9°C (52 F), humidity: 71%, wind: 9 m/s (17 kts) from WNW
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1 x 109 joules (278 kilowatt hours, equivalent to 0.239 tons of TNT) 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
2.841 km92 Km SSE of Ugashik, AlaskaUSGS
2.835 kmALASKA PENINSULAEMSC

User reports for this quake

At magnitude 2.8, this quake might have been felt very close to the epicenter and under calm conditions.
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!
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