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Fault analysis in the very shallow seismic reflection method; Gokusenso jishin hanshaho ni okeru danso kaiseki. 1

Abstract

To effectively use the very shallow seismic reflection for active fault survey, a method has been investigated by which fault structures can be appropriately reconstructed from the fault information detected in the original records. The first step of reconstructing the fault system from the travel time reflection curve was to grasp an outline of fault structure from the patterns of travel time curve observed in the original record. For the very shallow seismic reflection method, especially, the low velocity layers in a shallow part succeeding from the ground surface made the issue complicated. Then, the travel time reflection curves were calculated in the case of existing several horizontal reflection surfaces in the surface layer. The constant values, mean velocities to the depth at individual reflection surfaces were used for the approximation of velocities. The outline of fault structure was grasped from the observation of original record. Then, the structure was reconstructed from the travel time curves. When the mean velocity in the medium was known, reconstruction of the feature of reflection surfaces from the travel time curves could be determined by simple mapping. When the mean velocity was unknown, it was calculated using the reciprocal travel time from the common  More>>
Authors:
Nagumo, S; Muraoka, S; Kaida, Y; Takahashi, T [1] 
  1. OYO Corp., Tokyo (Japan)
Publication Date:
Oct 01, 1996
Product Type:
Conference
Report Number:
CONF-9610294-
Reference Number:
SCA: 150301; PA: NEDO-96:914741; EDB-97:072141; SN: 97001782473
Resource Relation:
Conference: 95. SEGJ conference, Butsuri tansa gakkai dai 95 kai (1996 nendo shuki) gakujutsu koenkai, Kyoto (Japan), 21-23 Oct 1996; Other Information: PBD: Oct 1996; Related Information: Is Part Of Proceedings of the 95th SEGJ Conference; PB: 344 p.; Butsuri tansa gakkai dai 95 kai (1996 nendo shuki) gakujutsu koenkai koen ronbunshu
Subject:
15 GEOTHERMAL ENERGY; SEISMIC SURVEYS; REFLECTION; SEISMIC SURFACE WAVES; GEOLOGIC FAULTS; DIAGRAMS; WAVE PROPAGATION; TRAJECTORIES; ELLIPTICAL CONFIGURATION
OSTI ID:
472635
Research Organizations:
Society of Exploration Geophysicists of Japan, Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97743637; TRN: 96:914741
Availability:
Available from The Society of Exploration Geophysicists of Japan, 2-18, Nakamagome 2-chome, Ota-ku, Tokyo, Japan; OSTI as DE97743637
Submitting Site:
NEDO
Size:
pp. 63-67
Announcement Date:

Citation Formats

Nagumo, S, Muraoka, S, Kaida, Y, and Takahashi, T. Fault analysis in the very shallow seismic reflection method; Gokusenso jishin hanshaho ni okeru danso kaiseki. 1. Japan: N. p., 1996. Web.
Nagumo, S, Muraoka, S, Kaida, Y, & Takahashi, T. Fault analysis in the very shallow seismic reflection method; Gokusenso jishin hanshaho ni okeru danso kaiseki. 1. Japan.
Nagumo, S, Muraoka, S, Kaida, Y, and Takahashi, T. 1996. "Fault analysis in the very shallow seismic reflection method; Gokusenso jishin hanshaho ni okeru danso kaiseki. 1." Japan.
@misc{etde_472635,
title = {Fault analysis in the very shallow seismic reflection method; Gokusenso jishin hanshaho ni okeru danso kaiseki. 1}
author = {Nagumo, S, Muraoka, S, Kaida, Y, and Takahashi, T}
abstractNote = {To effectively use the very shallow seismic reflection for active fault survey, a method has been investigated by which fault structures can be appropriately reconstructed from the fault information detected in the original records. The first step of reconstructing the fault system from the travel time reflection curve was to grasp an outline of fault structure from the patterns of travel time curve observed in the original record. For the very shallow seismic reflection method, especially, the low velocity layers in a shallow part succeeding from the ground surface made the issue complicated. Then, the travel time reflection curves were calculated in the case of existing several horizontal reflection surfaces in the surface layer. The constant values, mean velocities to the depth at individual reflection surfaces were used for the approximation of velocities. The outline of fault structure was grasped from the observation of original record. Then, the structure was reconstructed from the travel time curves. When the mean velocity in the medium was known, reconstruction of the feature of reflection surfaces from the travel time curves could be determined by simple mapping. When the mean velocity was unknown, it was calculated using the reciprocal travel time from the common reflection surface for individual reflection surfaces. 7 figs.}
place = {Japan}
year = {1996}
month = {Oct}
}