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Low level seismic (swarm) activity at Mt Hood, Oregon

  1. May 16, 2016 #1

    Astronuc

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    A journalist reported a 'New Earthquake Swarm is Rocking Oregon's Mt Hood.
    http://www.wired.com/2016/05/new-earthquake-swarm-rocking-mt-hood

    I wouldn't say rocking.

    I checked USGS, and didn't find anything over Mag 2.5, so I refined the search in the range of Mag 1 to 2.5, and found a number of small earthquakes in the range of 1 to 1.9 scattered around the south side of Mt. Hood just north of State Rd 35, and just east and south east of the Timberline ski area. The depths are about 3 to 4 km.

    Code (Text):
    2016-05-17 00:17:39 UTC  3.5 km  1.0  23km ESE of Mount Hood Village, Oregon
    2016-05-16 21:59:51 UTC  3.1 km  1.2  23km ESE of Mount Hood Village, Oregon
    2016-05-16 21:50:07 UTC  2.9 km  1.7  Other Event 22km E of Mount Hood Village
    2016-05-16 21:47:52 UTC  3.7 km  1.4  22km ESE of Mount Hood Village, Oregon
    2016-05-16 21:47:40 UTC  3.5 km  1.4  23km ESE of Mount Hood Village, Oregon
    2016-05-16 21:35:33 UTC  3.8 km  1.1  23km ESE of Mount Hood Village, Oregon
    2016-05-16 19:30:45 UTC  3.2 km  1.0  23km ESE of Mount Hood Village, Oregon
    2016-05-16 16:48:35 UTC  3.6 km  1.3  22km ESE of Mount Hood Village, Oregon
    2016-05-16 14:31:03 UTC  3.4 km  1.7  22km E of Mount Hood Village, Oregon
    2016-05-16 13:53:50 UTC  3.8 km  1.4  22km ESE of Mount Hood Village, Oregon
    2016-05-16 13:45:54 UTC  3.6 km  1.5  21km E of Mount Hood Village, Oregon
    2016-05-16 13:39:20 UTC  3.3 km  1.9  22km E of Mount Hood Village, Oregon
    2016-05-16 13:30:08 UTC  4.2 km  1.4  22km ESE of Mount Hood Village, Oregon
    2016-05-16 13:26:56 UTC  3.8 km  1.1  23km ESE of Mount Hood Village, Oregon
    2016-05-16 13:21:30 UTC  4.1 km  1.2  22km ESE of Mount Hood Village, Oregon
    2016-05-16 13:17:22 UTC  2.6 km  1.4  21km ESE of Mount Hood Village, Oregon
    2016-05-16 13:02:33 UTC  4.2 km  1.3  22km ESE of Mount Hood Village, Oregon
    2016-05-16 12:53:31 UTC  3.9 km  1.7  23km ESE of Mount Hood Village, Oregon
    2016-05-16 12:30:49 UTC  3.8 km  1.1  22km ESE of Mount Hood Village, Oregon
    2016-05-16 12:19:43 UTC  3.6 km  1.8  22km ESE of Mount Hood Village, Oregon
    2016-05-16 12:03:38 UTC  4.0 km  1.6  23km E of Mount Hood Village, Oregon
    2016-05-16 12:03:33 UTC  3.7 km  1.5  22km ESE of Mount Hood Village, Oregon
    2016-05-16 11:54:59 UTC  4.0 km  1.2  22km ESE of Mount Hood Village, Oregon
    2016-05-16 11:43:48 UTC  3.1 km  1.6  22km E of Mount Hood Village, Oregon
    2016-05-16 10:55:00 UTC  3.5 km  1.3  22km ESE of Mount Hood Village, Oregon
    2016-05-16 10:39:08 UTC  3.8 km  1.5  23km ESE of Mount Hood Village, Oregon
    2016-05-16 10:10:11 UTC  3.6 km  1.1  22km ESE of Mount Hood Village, Oregon
    2016-05-16 09:02:55 UTC  3.2 km  1.5  21km ESE of Mount Hood Village, Oregon
    2016-05-16 08:53:15 UTC  3.8 km  1.5  23km ESE of Mount Hood Village, Oregon
    2016-05-16 08:28:25 UTC  3.6 km  1.2  22km ESE of Mount Hood Village, Oregon
    2016-05-16 06:33:10 UTC  3.6 km  1.5  22km E of Mount Hood Village, Oregon
    2016-05-16 06:19:36 UTC  3.2 km  1.6  22km ESE of Mount Hood Village, Oregon
    2016-05-16 05:56:23 UTC  2.6 km  1.3  22km ESE of Mount Hood Village, Oregon
    2016-05-16 05:25:53 UTC  3.5 km  1.1  23km ESE of Mount Hood Village, Oregon
    2016-05-16 05:24:41 UTC  3.8 km  1.1  22km ESE of Mount Hood Village, Oregon
    2016-05-16 05:07:56 UTC  3.8 km  1.5  22km ESE of Mount Hood Village, Oregon
    2016-05-16 02:07:19 UTC  4.1 km  1.1  22km ESE of Mount Hood Village, Oregon
    2016-05-16 01:38:33 UTC  3.3 km  1.5  22km E of Mount Hood Village, Oregon
    2016-05-16 01:17:42 UTC  4.3 km  1.1  22km ESE of Mount Hood Village, Oregon

    2016-05-13 12:09:43 UTC  4.4 km  1.1  20km E of Mount Hood Village, Oregon
    I'm not sure what is the 'other event'.
     
    Last edited: May 16, 2016
  2. jcsd
  3. May 16, 2016 #2

    fresh_42

    Staff: Mentor

    Beside the low magnitude. How far is the Yellowstone bubble? This distance concerns me whenever I hear about an earthquake in the US.
     
  4. May 16, 2016 #3

    Astronuc

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    About 600 miles from Yellowstone, so it's not related. Mt Hood is one of numerous Cascade volcanoes. Hood's last eruption was about 200 years ago.
     
  5. May 16, 2016 #4

    davenn

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    Gold Member

    usually refers to something caused by human activity ... mining blast, mine collapse, fracking, etc etc

    but noted tho that this "other Event" is in the same area as the other events
    so maybe just not well defined ??
     
  6. May 16, 2016 #5

    OmCheeto

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    2016 Award

    I downloaded the data after I saw this thread, and it appears they've thrown that reading out.

    I was also surprised to see in the Wired article that this was tectonic activity, and not volcanic, so I double checked that.

    Here's a neat little info-graphic of how often the Cascade volcanoes have erupted over the last 4000 years:

    img1052_623w_500h.eruptions.of.cascade.mountains.last.4000.years.jpg
    [ref]
     
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