A fault scarp in an urban area identified by LiDAR survey: A Case study on the Itoigawa–Shizuoka Tectonic Line, central Japan

Kondo, Hisao; Toda, Shinji; Okumura, Koji; Takada, Keita; Chiba, Tatsuro

doi:10.1016/j.geomorph.2008.02.012

Cited by 56 publications

(31 citation statements)

References 12 publications

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“…Thus, these data can be used to explore quantitatively the characteristics of tectonic geomorphology (e.g., Arrowsmith and Zielke [7]). The data also revealed small-scale fault scarps in the urban area (e.g., Kondo et al [8]) as well as on the mountain slopes beneath the dense forest vegetation (e.g., Lin et al [9]). However, fault-related broad deformations were invisible on the usual topographical maps (slope shade map, hill shade map, and contour map), even if airborne LiDAR data was adopted.…”

Section: Fault-related Broad Deformations In An Urban Areamentioning

confidence: 86%

Extensive Area of Topographic Anaglyphs Covering Inland and Seafloor Derived Using a Detailed Digital Elevation Model for Identifying Broad Tectonic Deformations

Goto

2016

Earthquakes, Tsunamis and Nuclear Risks

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Topographic anaglyph images were viewed with red-cyan glasses enabled to recognize topographic relief features easily. Anaglyphs produced from digital elevation model (DEM) data are a very effective technique to identify tectonic geomorphology. The aim of this paper was to introduce an extensive area of topographic anaglyph images produced from the 5-m-mesh and 10-mmesh inland DEM of Geospatial Information Authority of Japan, as well as the 1-s-mesh DEM on the seafloor. In this paper, we present two examples which show that the extensive area of anaglyph produced from combined detailed DEM is advantageous for identifying broad tectonic geomorphology near a coastal area, as well as in urban areas, to view "naked" topography exaggerated vertically. For instance, the NW-SE trending active flexure scarp on the Musashino surface to the north of Tokyo Metropolis has been identified by means of interpretation of these images. The tectonic deformation on the shallow seafloor near Kisakata has also been identified, where the emergence of the lagoon associated with the Kisakata earthquake (M7.0) of 1804 was recorded in the historical documents. When anaglyphs from detailed DEM are extensive and have emphasized vertical exaggeration, they are valuable for recognizing long-wave (one kilometer to several hundred meter scaled) deformations.

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Section: Fault-related Broad Deformations In An Urban Areamentioning

confidence: 86%

Extensive Area of Topographic Anaglyphs Covering Inland and Seafloor Derived Using a Detailed Digital Elevation Model for Identifying Broad Tectonic Deformations

Goto

2016

Earthquakes, Tsunamis and Nuclear Risks

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“…In contrast to the three interplate thrust earthquakes, the fourth (Fig. 3d) is the 762 (or 841) inland earthquake, roughly as large as Mw 8, along the Itoigawa-Shizuoka Tectonic Line, which may have repeated historically (Okumura 2001;Kondo et al 2008); herein, we call this the ISTL earthquake. The fifth (Fig.…”

Section: Methods/experimentalmentioning

confidence: 98%

Elastostatic effects around a magma reservoir and pathway due to historic earthquakes: a case study of Mt. Fuji, Japan

Hosono

Mitsui

Ishibashi

et al. 2016

Prog. in Earth and Planet. Sci.

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We discuss elastostatic effects on Mt. Fuji, the tallest volcano in Japan, due to historic earthquakes in Japan. The 1707 Hoei eruption, which was the most explosive historic eruption of Mt. Fuji, occurred 49 days after the Hoei earthquake (Mw 8.7) along the Nankai Trough. It was previously suggested that the Hoei earthquake induced compression of a basaltic magma reservoir and unclamping of a dike-intruded region at depth, possibly triggering magma mixing and the subsequent Plinian eruption. Here, we show that the 1707 Hoei earthquake was a special case of induced volumetric strain and normal stress changes around the magma reservoir and pathway of Mt. Fuji. The 2011 Tohoku earthquake (Mw 9), along the Japan Trench, dilated the magma reservoir. It has been proposed that dilation of a magma reservoir drives the ascent of gas bubbles with magma and further depressurization, leading to a volcanic eruption. In fact, seismicity notably increased around Mt. Fuji during the first month after the 2011 Tohoku earthquake, even when we statistically exclude aftershocks, but the small amount of strain change (< 1 μ strain) may have limited the ascent of magma. For many historic earthquakes, the magma reservoir was compressed and the magma pathway was wholly clamped. This type of interaction has little potential to mechanically trigger the deformation of a volcano. Thus, Mt. Fuji may be less susceptible to elastostatic effects because of its location relative to the sources of large tectonic earthquakes. As an exception, a possible local earthquake in the Fujikawa-kako fault zone could induce a large amount of magma reservoir dilation beneath the southern flank of Mt. Fuji.

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“…Borehole data and archaeological studies indicate that the fault scarp is indeed in a pull-apart basin, and were formed during the most recent faulting event associated with historical earthquakes. In the Rangitaiki Plains, the fastest extending section of the onshore Taupo Rift in New Zealand, Begg and Mouslopoulou [41] used fault-parallel and faultnormal profiles created from a LiDAR-derived DEM with 3.5 m resolution, and identified a vertical displacement of ~3 m across an active normal fault. Topographic profiles derived from LiDAR data are effective for quantifying vertical displacements caused by active faults.…”

Section: Planar Geomorphic Markers Revealed By Lidarmentioning

confidence: 99%

LiDAR Data for Characterizing Linear and Planar Geomorphic Markers in Tectonic Geomorphology

Dong¹

2015

J Geophys Remote Sens

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A fault scarp in an urban area identified by LiDAR survey: A Case study on the Itoigawa–Shizuoka Tectonic Line, central Japan

Cited by 56 publications

References 12 publications

Extensive Area of Topographic Anaglyphs Covering Inland and Seafloor Derived Using a Detailed Digital Elevation Model for Identifying Broad Tectonic Deformations

Extensive Area of Topographic Anaglyphs Covering Inland and Seafloor Derived Using a Detailed Digital Elevation Model for Identifying Broad Tectonic Deformations

Elastostatic effects around a magma reservoir and pathway due to historic earthquakes: a case study of Mt. Fuji, Japan

LiDAR Data for Characterizing Linear and Planar Geomorphic Markers in Tectonic Geomorphology

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