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

  1. Mar 19, 2016 #1

    Astronuc

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    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.
     
  2. jcsd
  3. Mar 20, 2016 #2

    davenn

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    actually these are just ongoing aftershocks to a M 6.3 just over a week ago :wink:
    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

    160220-0319 events S of Atka Aleutians.JPG


    cheers
    Dave
     
  4. Mar 20, 2016 #3

    Astronuc

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    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.
     
  5. Mar 20, 2016 #4

    davenn

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    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 :wink:
    so posted just in case :smile:

    Dave
     
  6. Mar 20, 2016 #5

    Astronuc

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    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)
     
  7. Mar 20, 2016 #6

    davenn

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  8. Mar 28, 2016 #7

    1oldman2

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  9. Mar 28, 2016 #8

    davenn

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    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
     
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