Abstract
Along the Japan Sea coast in Akita Prefecture and in the vicinity, there exist active fault groups, such as the Kitayuri thrust fault group in the south and Noshiro thrust fault group in the north. It is estimated that there is another fault, running from Akita City located between the above-said two thrust fault groups into the Hachiro-kata reclaimed land, roughly connecting the two thrust fault groups. This third fault is supposed to be related to the hypocenter of Tencho Earthquake of 830, but its location and structural configuration are not known, and it is not known whether it is an active fault, either. Investigations are conducted using S- and P-waves. The greatest problem in the use of P-waves is that there exists a layer in which signal attenuation is high and transmission is anomalously slow. This problem is ascribed to the layer pore water rendered unsaturated though slightly by the inclusion of air bubbles, and is explained for the most part by the White model. A survey using S-waves is advantageous in that it does not experience no difficulty of this kind. In the P-wave cross section, a structure supposed to be an inversion layer is observed at a
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Kitsunezaki, C;
Fukutome, T;
Matsumoto, S;
Noda, K;
Sato, T;
[1]
Hayashi, H;
Ishii, E;
Yamanaka, Y;
Matsuno, K;
Mikuni, S
[2]
- Akita University, Akita (Japan). Mining College
- Suncoh Consultant Co. Ltd., Tokyo (Japan)
Citation Formats
Kitsunezaki, C, Fukutome, T, Matsumoto, S, Noda, K, Sato, T, Hayashi, H, Ishii, E, Yamanaka, Y, Matsuno, K, and Mikuni, S.
Shallow seismic reflection prospecting in Hachiro-kata reclaimed land; Hachirogata kantakuchi ni okeru senbu hanshaho jishin tansa.
Japan: N. p.,
1997.
Web.
Kitsunezaki, C, Fukutome, T, Matsumoto, S, Noda, K, Sato, T, Hayashi, H, Ishii, E, Yamanaka, Y, Matsuno, K, & Mikuni, S.
Shallow seismic reflection prospecting in Hachiro-kata reclaimed land; Hachirogata kantakuchi ni okeru senbu hanshaho jishin tansa.
Japan.
Kitsunezaki, C, Fukutome, T, Matsumoto, S, Noda, K, Sato, T, Hayashi, H, Ishii, E, Yamanaka, Y, Matsuno, K, and Mikuni, S.
1997.
"Shallow seismic reflection prospecting in Hachiro-kata reclaimed land; Hachirogata kantakuchi ni okeru senbu hanshaho jishin tansa."
Japan.
@misc{etde_522624,
title = {Shallow seismic reflection prospecting in Hachiro-kata reclaimed land; Hachirogata kantakuchi ni okeru senbu hanshaho jishin tansa}
author = {Kitsunezaki, C, Fukutome, T, Matsumoto, S, Noda, K, Sato, T, Hayashi, H, Ishii, E, Yamanaka, Y, Matsuno, K, and Mikuni, S}
abstractNote = {Along the Japan Sea coast in Akita Prefecture and in the vicinity, there exist active fault groups, such as the Kitayuri thrust fault group in the south and Noshiro thrust fault group in the north. It is estimated that there is another fault, running from Akita City located between the above-said two thrust fault groups into the Hachiro-kata reclaimed land, roughly connecting the two thrust fault groups. This third fault is supposed to be related to the hypocenter of Tencho Earthquake of 830, but its location and structural configuration are not known, and it is not known whether it is an active fault, either. Investigations are conducted using S- and P-waves. The greatest problem in the use of P-waves is that there exists a layer in which signal attenuation is high and transmission is anomalously slow. This problem is ascribed to the layer pore water rendered unsaturated though slightly by the inclusion of air bubbles, and is explained for the most part by the White model. A survey using S-waves is advantageous in that it does not experience no difficulty of this kind. In the P-wave cross section, a structure supposed to be an inversion layer is observed at a level deeper than 200m. In the case of the S-wave method, more details of the shallow structure will be available when the degree of CMP stacking is augmented as usual. 2 refs., 9 figs., 1 tab.}
place = {Japan}
year = {1997}
month = {May}
}
title = {Shallow seismic reflection prospecting in Hachiro-kata reclaimed land; Hachirogata kantakuchi ni okeru senbu hanshaho jishin tansa}
author = {Kitsunezaki, C, Fukutome, T, Matsumoto, S, Noda, K, Sato, T, Hayashi, H, Ishii, E, Yamanaka, Y, Matsuno, K, and Mikuni, S}
abstractNote = {Along the Japan Sea coast in Akita Prefecture and in the vicinity, there exist active fault groups, such as the Kitayuri thrust fault group in the south and Noshiro thrust fault group in the north. It is estimated that there is another fault, running from Akita City located between the above-said two thrust fault groups into the Hachiro-kata reclaimed land, roughly connecting the two thrust fault groups. This third fault is supposed to be related to the hypocenter of Tencho Earthquake of 830, but its location and structural configuration are not known, and it is not known whether it is an active fault, either. Investigations are conducted using S- and P-waves. The greatest problem in the use of P-waves is that there exists a layer in which signal attenuation is high and transmission is anomalously slow. This problem is ascribed to the layer pore water rendered unsaturated though slightly by the inclusion of air bubbles, and is explained for the most part by the White model. A survey using S-waves is advantageous in that it does not experience no difficulty of this kind. In the P-wave cross section, a structure supposed to be an inversion layer is observed at a level deeper than 200m. In the case of the S-wave method, more details of the shallow structure will be available when the degree of CMP stacking is augmented as usual. 2 refs., 9 figs., 1 tab.}
place = {Japan}
year = {1997}
month = {May}
}