Mag 6.0 - 76km S of Atka, Alaska and Swarm

[Astronuc]

There is a swarm of earthquakes in the area. It was lead off by a Mag 5.0, which was followed by the Mag 6.0.

http://earthquake.usgs.gov/earthquakes/eventpage/us20005axu#general_region

2016-03-19 01:35:12 (UTC)
Location: Lat. 51.513 °N, Long. 174.234 °W
Depth: 17.0 km (10.6 mi)

http://earthquake.usgs.gov/earthquakes/eventpage/us20005axl#general_region
The Mag 5.0 occurred 2016-03-19 01:22:16 (UTC)
Location: Lat. 51.380 °N, Long. 174.265 °W
Depth: 10.0 km (6.2 mi)

There were a bunch of 4.0-4.9 in the region following the first two.

 

[davenn]

There is a swarm of earthquakes in the area. It was lead off by a Mag 5.0, which was followed by the Mag 6.0.

actually these are just ongoing aftershocks to a M 6.3 just over a week ago
which was preceded by several foreshocks

M 6.3 - 71km S of Atka, Alaska

Time: 2016-03-12 18:06:45 UTC
Location: 51.561°N 174.027°W
Depth: 19.0 km

cheers
Dave

 

[Astronuc]

actually these are just ongoing aftershocks to a M 6.3 just over a week ago
which was preceded by several foreshocks

M 6.3 - 71km S of Atka, Alaska

Time: 2016-03-12 18:06:45 UTC
Location: 51.561°N 174.027°W
Depth: 19.0 km

Yeah - I had intended to mention that one. I got distracted this afternoon.

I wonder if we'll see a larger one in the region.

 

[davenn]

Yeah - I had intended to mention that one. I got distracted this afternoon.

no probs, I just didn't know if you knew it was part of an earlier larger event
your text sort of indicated that you didn't
so posted just in case

Dave

 

[Astronuc]

While it's not in Alaska, its part of the tectonic boundary on the Russian side, near the intersection of the Aleutian Trench and the Kuril-Kamchatka Trench.

M6.4 - 211km S of Ust'-Kamchatsk Staryy, Russia
http://earthquake.usgs.gov/earthquakes/eventpage/us20005bbh#general_region

Location: Lat. 54.333 °N, Long. 162.799 °E
Depth: 31.3 km (19.5 mi)

 

[davenn]

While it's not in Alaska, its part of the tectonic boundary on the Russian side, near the intersection of the Aleutian Trench and the Kuril-Kamchatka Trench.

M6.4 - 211km S of Ust'-Kamchatsk Staryy, Russia
http://earthquake.usgs.gov/earthquakes/eventpage/us20005bbh#general_region

Location: Lat. 54.333 °N, Long. 162.799 °E
Depth: 31.3 km (19.5 mi)

yup, recorded that one much clearer on my seismo

http://www.sydneystormcity.com/seismograms.htmD

 

[1oldman2]

I wonder if those quakes were a precursor to this event, seems likely but not sure of the locations being in the same area. any thoughts?
http://www.foxnews.com/us/2016/03/2...ding-ash-20000-feet-in-air.html?intcmp=hplnws

 

[davenn]

I wonder if those quakes were a precursor to this event, seems likely but not sure of the locations being in the same area. any thoughts?
http://www.foxnews.com/us/2016/03/2...ding-ash-20000-feet-in-air.html?intcmp=hplnws

the quakes were way too far away, more than 700km.

when looking at quake related volcanism, particularly in island arcs, look more closely at the islands and volcanoes immediately behind the subduction zone where the quakes occurred
Always remember too, that in these situations, a big quake doesn't mean immediate/short term volcanism. It is the long term subduction of the seafloor plate that produces both the quakes and the volcanism, not the other way around. That is, quakes and volcanism are by-products of the subduction, not the cause of it.cheers
Dave