LOVE WAVE TOMOGRAPHY OF THE MAKRAN SUBDUCTION ZONE FROM AMBIENT SEISMIC NOISE

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ABDETEDAL M.; SHOMALI Z.H.; GHEITANCHI M.R.

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Journal: GEOSCIENCES Year:2017 | Volume:26 | Issue:102 Page(s): 147-152

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Title

LOVE WAVE TOMOGRAPHY OF THE MAKRAN SUBDUCTION ZONE FROM AMBIENT SEISMIC NOISE

Author(s)

ABDETEDAL M. | SHOMALI Z.H. | GHEITANCHI M.R. | Issue Writer Certificate

Keywords

MAKRANQ2

SUBDUCTION ZONEQ1

AMBIENT SEISMIC NOISEQ1

DISPERSION CURVEQ1

INVERSIONQ2

UPPER MANTLEQ1

Abstract

The MAKRAN zone in southeastern Iran and southern Pakistan is the result of subduction of oceanic crust of the Arabian Plate under the Eurasian Plate. From seismic behavior point of view, there is a distinct segmentation between the western and eastern parts of the SUBDUCTION ZONE. The western part of the MAKRAN has an abnormally very low level of deep seismicity with lack of recorded great earthquakes, while the eastern part has experienced many great earthquakes. Another difference between the western and eastern parts of the MAKRAN region is that the distance between the Quaternary volcanic arc and fore-arc setting is larger in the east than in the west. Understanding the nature of unusual behaviors of the MAKRAN SUBDUCTION ZONE has long been one of the biggest challenges in seismotectonic investigations of this region. The present study aims at producing high-resolution love-wave velocity structure maps of the crust and the UPPER MANTLE in the MAKRAN SUBDUCTION ZONE using AMBIENT SEISMIC NOISE. To achieve this purpose, a large dataset has been provided to produce tomographic maps. Empirical Green’s functions were obtained from cross-correlations of broad-band seismic noise records at different stations inside and outside the region. Love-wave velocity DISPERSION CURVEs were then extracted from the ambient noise, and finally converted into a 2D group velocity image (or tomography map) for crustal and UPPER MANTLE structures of the region.

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APA: Copy

ABDETEDAL, M., SHOMALI, Z.H., & GHEITANCHI, M.R.. (2017). LOVE WAVE TOMOGRAPHY OF THE MAKRAN SUBDUCTION ZONE FROM AMBIENT SEISMIC NOISE. GEOSCIENCES, 26(102), 147-152. SID. https://sid.ir/paper/31477/en

Vancouver: Copy

ABDETEDAL M., SHOMALI Z.H., GHEITANCHI M.R.. LOVE WAVE TOMOGRAPHY OF THE MAKRAN SUBDUCTION ZONE FROM AMBIENT SEISMIC NOISE. GEOSCIENCES[Internet]. 2017;26(102):147-152. Available from: https://sid.ir/paper/31477/en

IEEE: Copy

M. ABDETEDAL, Z.H. SHOMALI, and M.R. GHEITANCHI, “LOVE WAVE TOMOGRAPHY OF THE MAKRAN SUBDUCTION ZONE FROM AMBIENT SEISMIC NOISE,” GEOSCIENCES, vol. 26, no. 102, pp. 147–152, 2017, [Online]. Available: https://sid.ir/paper/31477/en

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