Minor mag. 1.8 earthquake - 1 Km S of Tyonek, Alaska, USA, on Wednesday, 17 Feb 2021 9:45 am (GMT -9) -
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Minor magnitude 1.8 earthquake at 50 km depth
17 Feb 18:49 UTC: First to report: USGS after 4 minutes.
17 Feb 18:50: Hypocenter depth recalculated from 56.0 to 51.8 km (from 35 to 32 mi).
17 Feb 18:58: Magnitude recalculated from 1.7 to 1.8. Hypocenter depth recalculated from 51.8 to 49.5 km (from 32 to 31 mi).
17 Feb 18:50: Hypocenter depth recalculated from 56.0 to 51.8 km (from 35 to 32 mi).
17 Feb 18:58: Magnitude recalculated from 1.7 to 1.8. Hypocenter depth recalculated from 51.8 to 49.5 km (from 32 to 31 mi).
Date & time: 17 Feb 2021 18:45:33 UTC -
Local time at epicenter: Wednesday, 17 Feb 2021 9:45 am (GMT -9)
Magnitude: 1.8
Depth: 49.5 km
Epicenter latitude / longitude: 61.0514°N / 151.139°W
(Alaska, United States)Nearest volcano: Spurr (66 km / 41 mi)
Nearby towns and cities:
2 km (1 mi) S of Tyonek (pop: 171) --> See nearby quakes!
41 km (25 mi) N of Nikiski (pop: 4,490) --> See nearby quakes!
56 km (35 mi) N of Kenai (pop: 7,660) --> See nearby quakes!
61 km (38 mi) NNW of Sterling (pop: 5,620) --> See nearby quakes!
63 km (39 mi) N of Soldotna (pop: 4,540) --> See nearby quakes!
69 km (43 mi) WSW of Anchorage (pop: 298,700) --> See nearby quakes!
71 km (44 mi) N of Kalifornsky (pop: 7,850) --> See nearby quakes!
89 km (56 mi) WSW of Eagle River (pop: 24,800) --> See nearby quakes!
89 km (56 mi) WSW of Eagle River (Anchorage) (pop: 24,800) --> See nearby quakes!
97 km (60 mi) WSW of Knik-Fairview (pop: 14,900) --> See nearby quakes!
Weather at epicenter at time of quake:
Overcast Clouds
-1.8°C (29 F), humidity: 86%, wind: 6 m/s (11 kts) from NNE
Primary data source: USGS (United States Geological Survey)Overcast Clouds
-1.8°C (29 F), humidity: 86%, wind: 6 m/s (11 kts) from NNEEstimated released energy: 3.2 x 107 joules (8.78 kilowatt hours) More info
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.
| Magnitude | Depth | Location | Source |
| 1.8 | 50 km | 1 Km S of Tyonek, Alaska, USA | USGS |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
At magnitude 1.8, such a quake wouldn't normally be felt by people, but could be recorded instrumentally.
