Magnitude 3.8 - 57 miles S of Port Alexander
March 23, 2020 03:51:25 AKDT (March 23, 2020 11:51:25 UTC)
55.4542°N 135.0835°W Depth 9.1 miles (14 km)
This event has been reviewed by a seismologist
- 76 miles (123 km) W of Craig
- 78 miles (126 km) W of Klawock
- 84 miles (136 km) SW of Point Baker
- 90 miles (145 km) W of Hydaburg
- 101 miles (163 km) W of Thorne Bay
- 105 miles (170 km) W of Kasaan
- 111 miles (179 km) S of Sitka
- 114 miles (184 km) NW of Dixon Entrance
- 114 miles (184 km) SW of Kake
- 124 miles (201 km) SW of Petersburg
- 126 miles (204 km) SW of Wrangell
- 135 miles (218 km) W of Ketchikan
- 198 miles (321 km) S of Juneau
- Magnitude type: Ml2
- Event type: earthquake
Tectonic Setting of Southeast Alaska
Earthquakes in Southeast Alaska have shallow depths and are generally located along the Queen Charlotte and Fairweather faults, both of which are major transform plate boundaries. The Queen Charlotte Fault runs between the Pacific and North American plates, while the Fairweather Fault runs between the Yakutat microplate and North American Plate. The entire length of this fault system ruptured in major earthquakes over the past 90 years. The most significant event was a 1949 M8.1 earthquake that began in British Columbia and ruptured both south and north for a total of about 300 miles (483 km), crossing the border with Alaska. Other significant events in the region were the 1927 M7.1 event north of Sitka, and the 1958 M7.7 Lituya Bay, the 1972 M7.6 Sitka, and the 2013 M7.5 Craig earthquakes. The 2013 Craig Earthquake re-ruptured the northernmost part of the 1949 rupture zone.