Reproduction of mimosa and clock anomalies before earthquakes,Are they″Alice in the Wonderland Symdrome″?

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  • IKEYA Motoji
    Department of Earth and Space Science, Graduate School of Science, Osaka University
  • MATSUDA Tomonori
    Department of Earth and Space Science, Graduate School of Science, Osaka University
  • YAMANAKA Chihiro
    Department of Earth and Space Science, Graduate School of Science, Osaka University

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タイトル別名
  • Reproduction of mimosa and clock anomalies before earthquakes. Are they "Alice in the Wonderland Syndrome"?
  • Reproduction of mimosa and clock anomal
  • Are they“<i>Alice in the Wonderland Syndrome</i>”?

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Some earthquake precursor phenomena told as legends or reported retrospectively for the 1995 Kobe earthquake have been reproduced by laboratory experiments. Mimosa placed on the high voltage sphere of a Van de Graaff electrostatic generator closed its leaves and bowed on charging and air-gap discharging, presumably due to the current induced in its stem. Air-gap discharging caused sudden movements of eels in a nearby plastic aquarium. Eels moved also on applying a pulsed electric field of less than 0.5V/m, while catfish responded only at around 5V/m. The higher sensitivity of eels to electric field than that of catfish is consistent with the story in the Ansei Chronicle that a man could not find eels in a river but only catfish in violent movement before the earthquake. Eels might have already hidden themselves in panic. Rapid rotation and stopping of the second hand of a clock, which were observed before the Kobe Earthquake like in the“Alice in the Wonderland”, have also been reproduced by exposing clocks to electromagnetic waves generated by air-gap discharging. Reported malfunctioning of home electronic appliances before the earthquake would have been due to some natural electromagnetic disturbance at the epicenter.

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