3 ALASKA VOLCANOES SHOW SIGNS OF UNREST

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3 ALASKA VOLCANOES SHOW SIGNS OF UNREST

 user 2005-10-12 at 10:35:00 am Views: 48
  • #13959

    Three Alaska Volcanoes Show Signs of Unrest

    ANCHORAGE, Alaska (Oct.
    05) – Anchorage residents could see a cloud of steam over the weekend
    from a volcano 75 miles away — one of three Alaska volcanoes showing
    signs of unrest.
    The three volcanoes, including two located on remote Aleutian islands
    distant from any population centers, are setting off frequent tremors
    and minor bursts of ash or steam, seismologists said on Tuesday.
    Cleveland Volcano, 900 miles southwest of Anchorage, had a small
    eruption on Friday, said the Alaska Volcano Observatory, which monitors
    Alaska’s more than 40 active volcanoes.
    Its ash plume rose to a height of nearly 15,000 feet above sea level, observatory scientists said.
    A cloud of steam from the 11,070-foot Mount Spurr was visible from Anchorage over the weekend.
    Cleveland Volcano has had periodic but minor ash emissions and some
    debris flow caused by melted snow, said Dave Schneider, a U.S.
    Geological Survey volcanologist and acting scientist-in-charge at the
    Alaska Volcano Observatory.
    Ash emissions from Cleveland Volcano “are a lot easier to see now than
    they were in the summer because you have fresh snow,” Schneider said.
    Cleveland Volcano, which comprises the western half of uninhabited
    Chuginadak Island, last erupted in 2001. The closest community, 45
    miles to the east, is Nikolski, an Aleut village of 36 people.
    The other volcano showing unrest is 5,925-foot Tanaga Volcano.
    A series of eruptions in 1992 showered Anchorage and the surrounding
    region with ash, forcing a brief closure of Anchorage International
    Airport.