AN AUTOMATIC OBSERVATION SYSTEM FOR RECORDING ACTIVITIES OF CATFISH PRIOR TO EARTHQUAKES
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    Abstract:

    Based on the characteristics of hearing of catfish and their active habitude at night, we studied and made an automatic observation system with ultrasonic wave for recording activities of catfish prior to earthquakes. Observable results show that this system not only can sensitively record activities of catfish, but also has no effect on their normal activities, and surrounding sounds has no disturbance on it. At the same time, it can be applied to automatic observation of activities of other animals in water.
    Preliminary observation data show that automatic recording activities of catfish presented an outstanding rinse in 48 hours before two strong aftershocks(ML5.2 and ML5.5) occurring in Tangshan region during our observation from Jan. to June. 1982.

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History
  • Received:November 23,1982
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  • Adopted:
  • Online: June 24,2017
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