Earthquake #2 – Magnitude 6.3 – 84km WNW of Skagway, Alaska – May 1, 2017

May 1, 2017 by

USGS Event Report
Earthquake #2
2017-05-01 14:18:15 (UTC)
Magnitude 6.3
84km WNW of Skagway, Alaska
Location  59.744°N   -136.702°W
Depth  10 km

Seismotectonics of Offshore British Columbia-Southeastern Alaska and Vicinity
USGS “The tectonics of the Pacific margin of North America between Vancouver Island and south-central Alaska are dominated by the northwest motion of the Pacific plate with respect to the North America plate at a velocity of approximately 50 mm/yr.”

Earthquake #1 – Magnitude 6.2 – 88km WNW of Skagway, Alaska – May 1, 2017

May 1, 2017 by

USGS Earthquake Report

Earthquake #1
2017-05-01 12:31:54 (UTC)
Magnitude 6.2
Location  59.844°N  -136.695°W
88km WNW of Skagway, Alaska
Depth 2.2 km

Seismotectonics of Offshore British Columbia-Southeastern Alaska and Vicinity

USGS “The tectonics of the Pacific margin of North America between Vancouver Island and south-central Alaska are dominated by the northwest motion of the Pacific plate with respect to the North America plate at a velocity of approximately 50 mm/yr.”

M 6.9 – 28km SW of Burias, Philippines – April 28, 2017

April 29, 2017 by

USGS Event Report
2017-04-28 20:23:17 (UTC)
28km SW of Burias, Philippines
Magnitude 6.9
Location  5.516°N  125.093°E
Depth 26 km

 

 

Seismotectonics of the Philippine Sea and Vicinity by USGS
“The Philippine Sea plate is bordered by the larger Pacific and Eurasia plates and the smaller Sunda plate. The Philippine Sea plate is unusual in that its borders are nearly all zones of plate convergence. The Pacific plate is subducted into the mantle, south of Japan, beneath the Izu-Bonin and Mariana island arcs, which extend more than 3,000 km along the eastern margin of the Philippine Sea plate. This subduction zone is characterized by rapid plate convergence and high-level seismicity extending to depths of over 600 km. In spite of this extensive zone of plate convergence, the plate interface has been associated with few great (M>8.0) ‘megathrust’ earthquakes.”