2024-03-29T05:25:05Z
https://repository.dl.itc.u-tokyo.ac.jp/oai
oai:repository.dl.itc.u-tokyo.ac.jp:00032066
2022-12-19T04:08:24Z
80:4411:4417
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Regional Differencies in the Attenuation of Seismic Waves. 1. Attenuation of Short Period P Waves
地震波の減衰の地域性1: 短周期P波の減衰
吉田, 満
71148
中村, 功
71149
051.1
Boso peninsula is one of the mast active regions in crustal movement vertically and horizontally. These movement will weaken the elasticity of the medium and strengthen the attenuation of seismic wave. The attenuation factor Q was calculated using two shallow earthquakes (magnitude 4.4) which occurred far off southeas't of Boso peninsulal The epidentral distancies are about 200km (Fig. 1). Mean effective Q alang the path estimated at Kiyosumi observatory founded on a sandstone in Boso peninsula is lower than any other ones at other four stations in Kanto districts. The value at Kiyosumi (QK) was estimated as 150~250 and the one at Dodaira (QD) as 250~400 in the frequency range from 1.0 to 10.0 cps. The ratio of the average Q value at Kiyosumi to that at Dodaira is 0.5~0.6.
departmental bulletin paper
東京大学地震研究所
1974-03
application/pdf
地震研究所研究速報
12
73
82
AN10165194
https://repository.dl.itc.u-tokyo.ac.jp/record/32066/files/jis0120005.pdf
jpn