Overblog
Suivre ce blog
Editer l'article Administration Créer mon blog

Earth of fire

Actualité volcanique, Article de fond sur étude de volcan, tectonique, récits et photos de voyage

Publié le par Bernard Duyck
01/24/2016 Earthquake in Alaska - damage to infrastructure - CNN Photo

01/24/2016 Earthquake in Alaska - damage to infrastructure - CNN Photo

A 7.1-magnitude earthquake occurred on January 24 at 1:30 local, southwest of Anchorage, Alaska, up to the Cook Inlet and the Kenai Peninsula.
 

Location of M 7.1 earthquake in the southwest of Anchorage, Alaska - doc.EMSC - CSEM

Location of M 7.1 earthquake in the southwest of Anchorage, Alaska - doc.EMSC - CSEM

The earthquake on 01.24.2016 registered by the stations of Homer, Seward and Anchorage, in Alaska.

The earthquake on 01.24.2016 registered by the stations of Homer, Seward and Anchorage, in Alaska.

According to the USGS, it result of strike-slip faulting at intermediate depths, within the subducted lithosphere of the Pacific plate. In the region of the earthquake, the Pacific plate moves northwestward with respect to North America at a rate of 60 mm/yr, and begins its decent into the mantle at the Alaska-Aleutian Trench almost 400 km to the southeast of this earthquake.

These earthquakes are characterized by a hypocenter between 70 and 300 km, and classified as intermediate depth earthquakes. They represent strains in the subducting plate, rather than to the interface of plates. They cause less damage above the focal point that earthquakes of same magnitude near the surface.
 

Earthquake 24/1/2016 - damage to the road to Kalifornsky beach, south of Kenai - Alaska Dispatch Photo news

Earthquake 24/1/2016 - damage to the road to Kalifornsky beach, south of Kenai - Alaska Dispatch Photo news

Southern Alaska is a seismic region in relation to the boundary between the Pacific and North American plates. Other major earthquakes struck the region at the end of the last century: on March 27, 1964, an earthquake of magnitude 9.3 was recorded; Another of magnitude 6.8 occurred in July 2001, 120 km south -West of it on Sunday.

No impact is reported by the AVO / Alaska Volcano Observatory for volcanoes located on the edge of Cook Inlet.

 

Sources :

- USGS Earthquake Hazards Program

- EMSC

- AVO

Commenter cet article

Articles récents

Hébergé par Overblog