Seismic signals of a meteor wave.Seismic signals of a meteor meteor, appearance of a small particle flying through space that interacts with the earth's upper atmosphere. While still outside the atmosphere, the particle is known as a meteoroid. Countless meteoroids of varying sizes are moving about the solar system at any time. wave In the early morning hours of Sept. 19, 1986, a resident of Yellowknife, Northwest Territories Northwest Territories, territory (2001 pop. 37,360), 532,643 sq mi (1,379,028 sq km), NW Canada. The Northwest Territories lie W of Nunavut, N of lat. 60°N, and E of Yukon. , saw a meteor streak by overhead. Frank M. Anglin and Raymond A. W. Haddon at the Geological Survey The term geological survey can be used to describe both the conduct of a survey for geological purposes and an institution holding geological information. A geological survey of Canada in Ottawa report in the Aug. 13 NATURE that they subsequently found seismic signals at the Yellowknife seismic array that were probably generated by the shock wave created by the meteor as it moved through the atmosphere. There have been two previous reports of seismically detected meteors, but the researchers write that theirs is "the first unambiguous [observation] of a shock wave and associated seismic waves generated by a meteoroid meteoroid: see meteor. and observed by an array of closely spaced seismometers.' |
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