A STUDY OF THE STRONG GROUND MOTIONS OF 26 DECEMBER 2003 BAM EARTHQUAKE: MW6.5

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ZARE M.; HAMZEHLOU H.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Journal of Seismology and Earthquake Engineering Year:2004 | Volume:5-6 | Issue:4-1 (Special Issue on Bam Earthquake) Page(s): 33-56

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Title

A STUDY OF THE STRONG GROUND MOTIONS OF 26 DECEMBER 2003 BAM EARTHQUAKE: MW6.5

Author(s)

ZARE M. | HAMZEHLOU H. | Issue Writer Certificate

Keywords

BAM

STRONG MOTIONS

DATA PROCESSING

SOURCE PARAMETERS

SIMULATION

STRESS DROP

VELOCITY

DISPLACEMENT

SH WAVES

SUB-EVENTS

Abstract

The BAM earthquake of 26 December 2003 (Mw6.5) occurred at 01:56:56 (GMT, 05:26:56 local time) around the city of BAM in the southeast of Iran. The BAM earthquake of 26/12/2003 (Mw6.5) has demolished the city of BAM, having a population of about 100000 at the time of the earthquake. The BAM fault-which was mapped before the event on the geological maps-has been reactivated during the 26/12/2003 earthquake. It seems that a length of about 10km (at the surface) of this fault has been reactivated, where it passed exactly from the east of the city of BAM. The fault has a slope towards the west and the focus of the event was located close to the residential area (almost beneath the city of BAM). This caused a great damage in the macroseismic epicentral zone; however the STRONG MOTIONS have been attenuated very rapidly, specially towards the east-and west (fault normal) direction. The vertical directivity effects caused the amplification of the low frequency motions in the fault-normal direction as well as the greater amplitude of the motion on the vertical direction. Two strong phases of energy are seen on the accelerograms. The first comprises of a starting sub-event with right-lateral strike slip mechanism which is located south of BAM. The mechanism of the second sub-event is reverse mechanism. The comparison of observed and simulated ground motion indicates that rupture started at a depth of 8km, south of BAM and propagated toward north.

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APA: Copy

ZARE, M., & HAMZEHLOU, H.. (2004). A STUDY OF THE STRONG GROUND MOTIONS OF 26 DECEMBER 2003 BAM EARTHQUAKE: MW6.5. JOURNAL OF SEISMOLOGY AND EARTHQUAKE ENGINEERING, 5-6(4-1 (Special Issue on Bam Earthquake)), 33-56. SID. https://sid.ir/paper/542150/en

Vancouver: Copy

ZARE M., HAMZEHLOU H.. A STUDY OF THE STRONG GROUND MOTIONS OF 26 DECEMBER 2003 BAM EARTHQUAKE: MW6.5. JOURNAL OF SEISMOLOGY AND EARTHQUAKE ENGINEERING[Internet]. 2004;5-6(4-1 (Special Issue on Bam Earthquake)):33-56. Available from: https://sid.ir/paper/542150/en

IEEE: Copy

M. ZARE, and H. HAMZEHLOU, “A STUDY OF THE STRONG GROUND MOTIONS OF 26 DECEMBER 2003 BAM EARTHQUAKE: MW6.5,” JOURNAL OF SEISMOLOGY AND EARTHQUAKE ENGINEERING, vol. 5-6, no. 4-1 (Special Issue on Bam Earthquake), pp. 33–56, 2004, [Online]. Available: https://sid.ir/paper/542150/en

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