地震津波発生時の海底波動の成長 : 津波地震の縦波と横波の発達状況(沿岸海洋波の生成理論その50)

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There are two waves Zp and Zs between Pand Swaves. The Poisson's ration of Zp and Zs are equal Zero, and Zp wave delelops to P wave, and Zs wave decads to S wave. The "Quality factor" is denoted by the following formula: log_e(ξ_p/ξ_Zp)=(2π)^2{(1-2ν)/3(1-ν)^2}^<1/2>・(h/λ), where ξ_p and ξ_Zp are Ampliludes, ν is Poisson's ratio, h is depth of hypocentre, λ is wave length. The velocity ratio of Zp and Zs is principally υ_p/υ_s=√<2>. For example of December 17th 11h 08m 16・7s 1987, 35°21'N 140°29'E M6.7 Depth 58km. υ_p=7.732km/sec, υ_Zp=5.616km/sec, υ_Zs=4.126km/sec, υ_s=3.645km/sec, μ=0.309, λ=257.094km. The values of quality factor are 2.201 for left hand and 2.194 for right hand in the both hand of the avobe formula. Before earth quake occures aqualistic wave appears. Its acceleration on the bottom surface is analysed as a_j=υ^2_j/h_j, where υ_j=1.482km/sec, h_j=57.618km and G_j=38.136m/sec^2.
1988-08-25