Light mag. 3.7 earthquake - Gulf of Alaska, 72 mi southeast of Sand Point, Aleutians East County, Alaska, USA, on Thursday, 4 Mar 2021 11:48 am (GMT -11) -
Quake Data | Interactive map | User Reports | Earlier quakes in same area | Quakes in the US| Alaska | Alaska
Light magnitude 3.7 earthquake at 33 km depth
4 Mar 23:11 UTC: First to report: USGS after 22 minutes.
4 Mar 23:50: Magnitude recalculated from 3.5 to 3.7. Hypocenter depth recalculated from 46.9 to 33.0 km (from 29 to 21 mi). Epicenter location corrected by 3.7 km (2.3 mi) towards W.
4 Mar 23:50: Magnitude recalculated from 3.5 to 3.7. Hypocenter depth recalculated from 46.9 to 33.0 km (from 29 to 21 mi). Epicenter location corrected by 3.7 km (2.3 mi) towards W.
Date & time: 4 Mar 2021 22:48:45 UTC -
Local time at epicenter: Thursday, 4 Mar 2021 11:48 am (GMT -11)
Magnitude: 3.7
Depth: 33.0 km
Epicenter latitude / longitude: 54.4007°N / 159.681°W
(Gulf of Alaska, Alaska, United States)Nearest volcano: Stepovak Bay 2 (170 km / 106 mi)
Nearby towns and cities:
117 km (72 mi) SSE of Sand Point (pop: 1,060) --> See nearby quakes!
171 km (107 mi) S of Perryville (pop: 113) --> See nearby quakes!
185 km (115 mi) ESE of King Cove (pop: 1,010) --> See nearby quakes!
203 km (126 mi) SSE of Nelson Lagoon (pop: 52) --> See nearby quakes!
214 km (133 mi) ESE of Cold Bay (pop: 123) --> See nearby quakes!
214 km (133 mi) SSW of Chignik Lake (pop: 73) --> See nearby quakes!
224 km (139 mi) SSW of Chignik Lagoon (pop: 78) --> See nearby quakes!
245 km (152 mi) E of False Pass (pop: 40) --> See nearby quakes!
290 km (180 mi) SSW of Port Heiden (pop: 98) --> See nearby quakes!
397 km (247 mi) E of Akutan (pop: 1,040) --> See nearby quakes!
Weather at epicenter at time of quake:
Moderate Rain
3.3°C (38 F), humidity: 92%, wind: 15 m/s (29 kts) from SSW
Primary data source: USGS (United States Geological Survey)Moderate Rain
3.3°C (38 F), humidity: 92%, wind: 15 m/s (29 kts) from SSWEstimated released energy: 2.2 x 1010 joules (6.22 megawatt hours, equivalent to 5.35 tons of TNT) 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 |
| 3.7 | 33 km | 116 Km SSE of Sand Point, Alaska, USA | USGS |
| 3.7 | 33 km | SOUTH OF ALASKA, USA | EMSC |
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!
Earlier earthquakes in the same area
Click here to search our database for earlier earthquakes in the same area since 1900!
