Neotectonic stresses in the Sangchal earthquake (1957) area – Mazandaran

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TABASSI HADI

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Journal: JOURNAL OF NATURAL ENVIRONMENT HAZARDS Year:2020 | Volume:9 | Issue:24 Page(s): 113-128

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Title

Neotectonic stresses in the Sangchal earthquake (1957) area – Mazandaran

Author(s)

TABASSI HADI | Issue Writer Certificate

Keywords

Neotectonic StressQ1

North Alborz FaultQ1

Maximum Stress OrientationQ1

EarthquakeQ1

AlborzQ2

Abstract

The Sangchal Earthquake occurred on July 2, 1957, in the central part of the Alborz Fault/fa?page=1&sort=1&ftyp=all&fgrp=all&fyrs=all" target="_blank">North Alborz Fault zone. The Alborz Fault/fa?page=1&sort=1&ftyp=all&fgrp=all&fyrs=all" target="_blank">North Alborz Fault is an arched shape fault that continues from Lahijan to Gonbad-e Kavos. This fault, along with Khazar, Lalehband, Kandovan and Mosha faults have affected the shortening and rising of the Alborz Mountains. This shortening and uplift are accompanied by large Earthquake events that continue today. With knowledge of the geometry of faults and how faults are displaced and the use of computational methods for fault analysis and also, the Focal mechanism, direction of maximum tension governing the part of Alborz Fault/fa?page=1&sort=1&ftyp=all&fgrp=all&fyrs=all" target="_blank">North Alborz Fault has been determined. The two methods show similar acceptable results. In addition, considering the comparison of the findings with the results of geodetic studies of the scope, accuracy of the findings is confirmed. The results of the study show that during the Alborz Fault/fa?page=1&sort=1&ftyp=all&fgrp=all&fyrs=all" target="_blank">North Alborz Fault, the dominant vector is compressive, and the left-lateral slip is observed. From the central part of the Alborz to the east, the left lateral displacement increases and causes shear mechanism in the eastern parts of the Alborz. This movement has caused compressive Earthquakes in the central Alborz and compressive-shear Earthquakes in the eastern parts. Therefore, the magnitude of future Earthquakes in the eastern part is slightly smaller than the central Alborz Earthquakes.

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APA: Copy

TABASSI, HADI. (2020). Neotectonic stresses in the Sangchal earthquake (1957) area – Mazandaran. JOURNAL OF NATURAL ENVIRONMENT HAZARDS, 9(24 ), 113-128. SID. https://sid.ir/paper/363789/en

Vancouver: Copy

TABASSI HADI. Neotectonic stresses in the Sangchal earthquake (1957) area – Mazandaran. JOURNAL OF NATURAL ENVIRONMENT HAZARDS[Internet]. 2020;9(24 ):113-128. Available from: https://sid.ir/paper/363789/en

IEEE: Copy

HADI TABASSI, “Neotectonic stresses in the Sangchal earthquake (1957) area – Mazandaran,” JOURNAL OF NATURAL ENVIRONMENT HAZARDS, vol. 9, no. 24 , pp. 113–128, 2020, [Online]. Available: https://sid.ir/paper/363789/en

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