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  • "Thunderbird" and "Whale"

    Native tales hint at past West Coast tsunamis
    Mon Jul 11, 6:23 PM ET

    SEATTLE (Reuters) - Tales about "Thunderbird" and "Whale" by native tribes along the U.S. West Coast, along with geological clues, point to at least two massive quakes and tsunamis that have hit the area in the last 1,100 years, a researcher said on Monday.

    "Native people here were well aware that earthquakes happened and that is reflected in their oral traditions," said Ruth Ludwin, a University of Washington researcher who recently published two papers detailing such folklore.

    In one tale, the mythical wind creature "Thunderbird" drives its talons into "Whale's" back and is dragged to the bottom of the ocean, which she said could be interpreted as a tsunami-like event.

    The stories were collected from native tribes in northern California, Oregon, Washington and just south of Canada's Vancouver Island.

    Ludwin, who collaborated with seismologists, said she began looking into the region's "geomythology" six years ago because of the lack of such data, which can be found in other areas such as Japan and the Indonesian island of Sumatra.

    In December, a 9.15 magnitude earthquake erupted off the coast of Indonesia's Sumatra island. The quake, the strongest in 40 years, sent walls of water as high as 33 feet barrelling into 13 Indian Ocean nations and killed 160,000 people. Last month, a major 7.0 magnitude earthquake off the coast of northern California triggered tsunami alerts along most of the U.S. West Coast. The alarm was quickly called off and there were no casualties or damage.

    The Cascadia subduction zone, which generates much of the seismic activity in the Pacific Northwest, had at least seven major earthquakes in the last 3,500 years, according to researchers.

    One massive earthquake is estimated to have hit the region in 900, while eyewitness accounts from the 19th century point to a huge earthquake and tsunami that hit the area in 1700.

  • #2
    Michael Schirber
    LiveScience Staff Writer
    LiveScience.com

    The Cascadia subduction zone -- a fault line stretching along the coast from Vancouver to northern California -- likely erupted in seven or more major earthquakes in the last 3,500 years, geologists have learned in recent years.

    The Pacific Northwest is an historically active area for earthquakes and tsunamis. But some geological records can be difficult to sift through.

    Now further clues of the region's catastrophic events have emerged from native lore.

    Some of these events apparently were recorded in the Native American lore from the region. Through the use of mythological figures that represent wind, thunder, and water, a number of native stories describe major earth trembling and flooding along the coastline.

    "There's a frightening amount of it," says Ruth Ludwin from the University of Washington. "It appears that these stories have to do with earthquake-, tsunami- and landslide-like events."

    One recurring theme in this oral tradition is the epic battle between Thunderbird and Whale. Ludwin and her colleagues find a metaphor for ground shaking and ocean surges in stories of Thunderbird being dragged down to the ocean floor, with its talons dug into Whale's back.

    Other stories depict a shape-shifting spirit -- called a'yahos by the Salish people -- that often appears as a giant serpent with two heads or blazing eyes and horns. A'yahos is associated with shaking and rushes of muddy water.

    "As you go around the region, there are very many of these stories and they are central to the native cultures, which suggests that these past earthquakes had profound effects on the local inhabitants," Ludwin said.

    In two papers for the journal Seismological Research Letters, Ludwin and her collaborators have collected such stories in order to relate them to specific occurrences in the geologic past.

    For instance, between 1860 and 1964, there were nine separate tales that appear to all describe a large tsunami from January 1700. Three of these stories -- passed down to grandchildren or great-grandchildren -- were eyewitness accounts of the flooding.

    "There were a lot of native people living here," Ludwin said. "Hearing the local story based on eyewitness accounts helps us to realize that the event occurred right here and that people saw it and remembered it for many generations."

    Across the Pacific, this same tsunami resulted in flooding in Japan. Recent evidence points to a magnitude 9 earthquake on the Cascadia subduction zone as the cause of these giant waves.

    Other native tales may be related to a major earthquake on the Seattle fault that erupted around 900 A.D. and presumably unleashed a tsunami in Puget Sound. The researchers found five stories about a'yahos that are associated with spots along this fault line, and another 13 stories that originate from Puget Sound and the surrounding region.

    One story mentions a spirit boulder, which the researchers matched to an actual boulder located just south of the Fauntleroy ferry terminal in West Seattle. Subsequent analysis determined that this boulder was dislodged by a prehistoric landslide that may have been a mile in length.

    Interpreting all the stories has not been easy, since any given earthquake has different effects in different places. But Ludwin said that knowing some of the symbolism has helped bridge the human history with the geologic history.

    "Over time, so much has been lost but the stories still have a tremendous richness of detail. Things happened that left a very deep cultural impression," Ludwin said.

    Comment


    • #3
      interesting how she made this connection. I would'nt have made that one myself but yeah, seems feasible.
      Don't worry that it's not good enough for anyone else to hear... just sing, sing a song.sigpic

      Comment

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