Rogional Center for Earthquake Prediction Observation,School of Science,Nagoya University
Rogional Observation Center for Earthquake Prediction,Faculty of Science,Kyoto University
抄録(英)
Two types of noise recorded in seismic explosion experiments around Syowa Station in Antarctica are discussed. One is wind-induced noise which is detected directly by a seismometer. This type of noise increases with a wind velocity, and when the wind velocity is over 15 m/s, seismic observations are not in success. With the object of noise reduction, seismometers buried in a hole at depths of 3, 5 and 10 m were examined, but the noise existed at 10 m. Seismometers should be buried deeper than 10 m. Another is electrostatic noise which frequently deranges a clock signal or destroys an electric circuit in the worst case. This noise is caused by drifting electrified snow, not by a seismometer itself. It was excited on a signal cable stretched on the snow surface from the seismometer to a recorder. To reduce this noise, the cable should be as short as possible and be laid in parallel with the direction of wind.
雑誌書誌ID
AA00733470
雑誌名
Memoirs of National Institute of Polar Research. Ser. C, Earth sciences
Nature of noises on ice sheet in East Antarctica
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KJ00000011323
(1MB)
概要
