Loading ...
Sorry, an error occurred while loading the content.

Yellowstone Earthquake Swarm Puzzles Scientists

Expand Messages
  • NHNE Wavemaker List
    NHNE Wavemaker News List Current Members: 428 Be The Wind In NHNE s Sails. Join Our 58 Monthly Supporters: http://www.nhne.org/DONATE/tabid/398/Default.aspx
    Message 1 of 1 , Jan 2, 2009
    • 0 Attachment
      NHNE Wavemaker News List
      Current Members: 428
      Be The Wind In NHNE's Sails. Join Our 58 Monthly Supporters:
      http://www.nhne.org/DONATE/tabid/398/Default.aspx

      Subscribe / unsubscribe / important links at the bottom of this message.

      ------------

      EDITOR'S NOTE:

      The earthquake activity in Yellowstone that the article below reports on has
      continued since it was written. Yesterday, January 2nd, was an especially
      active day with six 3.0 to 3.5 tremors. You can find a list of current
      quakes at this location:

      http://earthquake.usgs.gov/eqcenter/recenteqsus/Maps/special/Yellowstone_eqs
      .php

      --- David Sunfellow

      ------------

      YELLOWSTONE EARTHQUAKE SWARM PUZZLES SCIENTISTS
      Live Science
      December 30, 2008

      http://www.livescience.com/environment/081230-yellowstone-earthquake-swarm.h
      tml

      A swarm of small earthquakes in Yellowstone National Park is the most
      intense measured there in years, leaving scientists puzzled.

      The region is known for such swarms -- 1,000 to 2,000 quakes occur annually
      in the park. Yellowstone's 10,000 geysers and hot springs, including the Old
      Faithful Geyser, may be the result of this geologic activity.

      But the latest shaking is notable for the number of tiny temblors and their
      intensity, according to a statement yesterday from the University of Utah,
      where scientists monitor seismic activity in Yellowstone. (Yellowstone is
      located mostly in the northwest corner of Wyoming.)

      The largest of the earthquakes was a magnitude 3.9 at 10:15 pm MST on Dec.
      27, a day after the swarm began. The sequence has included nine events of
      magnitude 3 to 3.9 and approximately 24 of magnitude 2 to 3 at the time of
      this release. A total of more than 250 events large enough to be located
      have occurred in this swarm.

      "Scientists cannot identify any causative fault or other feature without
      further analysis," according to the statement.

      Most of these temblors would not be felt by humans. Earthquakes generally
      have to exceed magnitude 4.0 to cause light damage.

      Scientists wonder if the shaking might presage a larger event. This month's
      swarm is the most intense in this area for some years, scientists said. It
      is centered on the east side of the Yellowstone caldera, a giant basin
      created in a colossal eruption some 620,000 years ago.

      Researchers have long predicted that the Yellowstone supervolcano will
      eventually erupt again, with devastating consequences for much of the United
      States. Half the country could be covered in ash up to 3 feet (1 meter)
      deep, one study predicts. But those same researchers say nothing suggests
      such an eruption is imminent. They point out, however, that Yellowstone
      seems to blow its top about every 600,000 years.

      Meanwhile, the region's deep secrets are still being revealed.

      Last year researchers reported on unusual slow movement below the surface
      that's tied to a newfound gradual sinking of the nearby Teton Range. And in
      2006, scientists discovered that in the previous decade, the volcano had
      risen nearly 5 inches.

      "Could it develop into a bigger fault or something related to hydrothermal
      activity?" wonders Robert Smith, a professor of geophysics at the University
      of Utah. "We don't know," he said this week.

      Smith and his colleagues said they'll continue to monitor the activity.

      ------------

      NHNE Wavemaker News List:

      Send Some Green Love To NHNE:
      http://www.nhne.org/DONATE/tabid/398/Default.aspx

      To subscribe, send a message to:
      nhnenews-subscribe@yahoogroups.com

      To unsubscribe, send a message to:
      nhnenews-unsubscribe@yahoogroups.com

      To review current posts:
      http://groups.yahoo.com/group/nhnenews/messages
      http://www.nhne.org/tabid/1044/Default.aspx

      Visit NHNE's Mother Ship:
      http://www.nhne.org/

      Visit NHNE's Online Community:
      http://nhnecommunity.ning.com/

      Visit Integral NHNE:
      http://integralnhne.ning.com/

      Published by David Sunfellow
      NewHeavenNewEarth (NHNE)
      eMail: nhne@...
      Phone: (928) 257-3200
      Fax: (815) 642-0117

      P.O. Box 2242
      Sedona, AZ 86339
    Your message has been successfully submitted and would be delivered to recipients shortly.