Location

San Diego, California

Session Start Date

5-24-2010

Session End Date

5-29-2010

Abstract

On October 29, 2008 two shallow focused earthquakes of Mw 6.5 struck the Pishin-Ziarat districts of Baluchistan in Pakistan. Both seismic events took place between 12 hours of each other with Intensity X and have been termed as Double Earthquake. The Earthquakes are located approximately 50 km northeast of the region of most intense damage from the Pakistan earthquake of May 30, 1935 (Mw 7.8), which is estimated to have killed 35,000 people. Field observations in the earthquake affected areas were undertaken field observations along previously mapped seismically active Gogai, Bibai and Kawas Tangi faults and study Seismological Characteristics such as surface rupture, displacements, rock falls, landslides, slumping and liquefactions. More than 1500 aftershocks of Mw 3.5 have been recorded up till April, 30, 2009 with many felt in an area of around 350 sq km, which left around 400 people killed, 70,000 homeless including 30,000 children. All the aftershocks were located in the Suleiman fold-and-thrust belt, a region where geologically young Tertiary sedimentary rocks have been folded and squeezed by forces associated with the India-Eurasia collision. The earthquakes are located approximately 80 km east of the 650-km-long Chaman fault, which is a major left-lateral strikeslip fault that accommodates a significant amount of the slip across the plate boundary. The occurrence of the earthquakes suggests that other strike-slip faults are present beneath the fold-and-thrust belt and that they accommodate some of the relative motion of the India and Eurasia plates.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Meeting Name

Fifth Conference

Publisher

Missouri University of Science and Technology

Publication Date

5-24-2010

Document Version

Final Version

Rights

© 2010 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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May 24th, 12:00 AM May 29th, 12:00 AM

Some Seismological Characteristics of Mw 6.5 Pishin-Ziarat October 29, 2008 Double Earthquake

San Diego, California

On October 29, 2008 two shallow focused earthquakes of Mw 6.5 struck the Pishin-Ziarat districts of Baluchistan in Pakistan. Both seismic events took place between 12 hours of each other with Intensity X and have been termed as Double Earthquake. The Earthquakes are located approximately 50 km northeast of the region of most intense damage from the Pakistan earthquake of May 30, 1935 (Mw 7.8), which is estimated to have killed 35,000 people. Field observations in the earthquake affected areas were undertaken field observations along previously mapped seismically active Gogai, Bibai and Kawas Tangi faults and study Seismological Characteristics such as surface rupture, displacements, rock falls, landslides, slumping and liquefactions. More than 1500 aftershocks of Mw 3.5 have been recorded up till April, 30, 2009 with many felt in an area of around 350 sq km, which left around 400 people killed, 70,000 homeless including 30,000 children. All the aftershocks were located in the Suleiman fold-and-thrust belt, a region where geologically young Tertiary sedimentary rocks have been folded and squeezed by forces associated with the India-Eurasia collision. The earthquakes are located approximately 80 km east of the 650-km-long Chaman fault, which is a major left-lateral strikeslip fault that accommodates a significant amount of the slip across the plate boundary. The occurrence of the earthquakes suggests that other strike-slip faults are present beneath the fold-and-thrust belt and that they accommodate some of the relative motion of the India and Eurasia plates.