Application of seismic diffraction imaging for detecting near-surface inhomogeneities in the Dead Sea area

Keydar, S.; Pelman, D.; Ezersky, M.

doi:10.1016/j.jappgeo.2010.04.001

Cited by 15 publications

(4 citation statements)

References 9 publications

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“…Figure 1 in [32]), to understand causes and consequences of the dramatic morphological changes [33,34]. In addition, international research programs in the years since 2000 to the early 2010s explored for a presumed massive salt layer beneath the affected area using geophysical techniques [35][36][37][38][39][40] and delineation of sinkholes according to geological features in a rift system such as en-echelon structures [41]. The reader is referred to Polom et al 2018 [32] for a comprehensive summary of the geophysical and hydrogeological surveys and their locations until 2010.…”

Section: Previous Research and Specific Geohazards At The Uggp Highli...mentioning

confidence: 99%

A Vision on a UNESCO Global Geopark at the Southeastern Dead Sea in Jordan—How Natural Hazards May Offer Geotourism Opportunities

Al-Halbouni

AlRabayah

Nakath

et al. 2022

Land

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This paper aims to identify and discuss the chances, solutions, and possible drawbacks related to the establishment of safe geotourism sites in subsidence-affected areas, exemplarily applied to the Ghor Al-Haditha sinkhole site at the southeastern shore of the Dead Sea. Such safe areas shall be established in the territory of the proposed future UNESCO Global Geopark (UGGp) in Jordan. The highlights of the geopark and the basis of its creation are the subsidence features and stream channels found along the SE shoreline of the Dead Sea, which form both a natural hazard and geological heritage of high international significance and have attracted many researchers so far. This recent and ongoing formation is related to the sharp regression of the lake, the specific geomechanical conditions, and the hydrogeologic and climatic background of the surroundings. Nearby communities have suffered in economic terms from these natural phenomena, including flash floods and droughts in this semi-arid to arid region. We here present a concept on how to integrate geoscientific research for hazard monitoring and early warning to maintain safety for inhabitants and visitors on the one hand and reach sustainable economic development through the establishment of geotourism sites on the other hand. This highlight area of the proposed UGGp serves as a starting example for delineating safe zones for walkways and infrastructure. This involves two-way knowledge transfer between spatial planning and hydrogeophysical monitoring, a network of community-supported geophysical surveillance, and regular maintenance and adaptation. The cross-cutting benefits for the territory involve the delineation of safe areas for agriculture and geotourism, the increase of sustainable tourism in the region with a shift towards alternative ways of income, more investment in infrastructure, a growth of international visibility of the region, enhanced environmental education with focus on responsible water usage, and involvement in international research and education projects.

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Section: Previous Research and Specific Geohazards At The Uggp Highli...mentioning

confidence: 99%

A Vision on a UNESCO Global Geopark at the Southeastern Dead Sea in Jordan—How Natural Hazards May Offer Geotourism Opportunities

Al-Halbouni

AlRabayah

Nakath

et al. 2022

Land

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“…Unlike the reflection waves associated with smooth variations of the subsurface properties, diffraction waves are generated from small-scale bodies and discontinuities, such as cracks, caves, fractures, and pinch-outs [28][29][30]. Modelling and interpreting seismic diffractions have proven their value in providing information about the nature and presence of the small-scale bodies in the subsurface [31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Seismic Diffraction Analysis of a Fluid Escape Pipe beneath the Submarine Gas Bubble Plume in the Haima Cold Seep Area

Liu

Chen

et al. 2021

Geofluids

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Pipe structures are considered as fluid conduits beneath cold seeps. These structures have been observed in many geological settings and are widely accepted as the most critical pathway for fluid migration. One of such pipe structures in the Haima cold seep region is investigated herein. The pipe structure extends from below the BSR and reaches the seafloor. It is characterized by a string of events with short and strong seismic amplitudes, similar to the string of bead reflections (SBRs) associated with small-scale caves in carbonate reservoirs. This leads to the hypothesis that multiple small-scale bodies exist within the pipe structure. We test this hypothesis by analysis of diffraction waves and numerical seismic modeling. Travel time pattern analysis indicates that the diffractors within the pipe structure caused the rich diffraction waves on the shot records, and the reversed polarity indicates that the diffractors have a lower impedance than the surrounding sediments. These low-impedance bodies are interpreted as gas pockets within the pipe structures. Based on these interpretations, a conceptual model is proposed to describe the fluid migration process within the pipe. Briefly, we propose that gas pockets within the pipe structure could be analogue to the magma chambers located beneath volcanoes and this may provide a new insight into how gases migrate through the pipe structure and reach the seafloor.

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“…In a standard seismic prospecting, these waves are usually treated as noise. But for locating local sources these waves provide the most valuable source of information [5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Three–Dimensional Seismic Diffraction Imaging for Detecting Near-Surface Inhomogeneities

Keydar¹,

Shtivelman²,

Arzi³

2018

Geophysics

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One of the problems encountered in a variety of near-surface investigations is detecting and mapping localized inhomogeneities. Typical examples of such inhomogeneous sources are cavities, caves and tunnels. Different methods for detecting shallow subsurface sources utilizing seismic waves diffracted by these sources were proposed by many researchers in the last three decades. Most of these methods suggest that every subsurface point is a possible location of a point diffractor. Imaging of the diffractors is based on a spatial summation of the diffracted wavefield along diffraction time surfaces (defined by source-receiver geometry) in 2D or 3D space. The summation is performed with a fixed velocity value estimated from velocity analysis of the diffraction data. In this study, we present a path integral summation approach, where for every subsurface point the wavefield is stacked together along all possible diffraction time surfaces having a common apex at a given time. The result of the imaging is a 3D volume in which prominent diffraction anomalies appear at spatial locations close to the imaged sources. This path integral summation approach has been successfully tested on synthetic data and further applied at several sites with known subsurface sources.

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Application of seismic diffraction imaging for detecting near-surface inhomogeneities in the Dead Sea area

Cited by 15 publications

References 9 publications

A Vision on a UNESCO Global Geopark at the Southeastern Dead Sea in Jordan—How Natural Hazards May Offer Geotourism Opportunities

A Vision on a UNESCO Global Geopark at the Southeastern Dead Sea in Jordan—How Natural Hazards May Offer Geotourism Opportunities

Seismic Diffraction Analysis of a Fluid Escape Pipe beneath the Submarine Gas Bubble Plume in the Haima Cold Seep Area

Three–Dimensional Seismic Diffraction Imaging for Detecting Near-Surface Inhomogeneities

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