Location
New York, New York
Date
16 Apr 2004, 1:30pm - 3:30pm
Abstract
In recent years there were several earthquakes in Turkey with magnitudes 7.4, 7.2 and 6 in Kocaeli, Duzce and Pulumur respectively. The first two occurred in 1999 causing the most damage both structurally and economically. The last happened in January 2003. These were all on the North Anatolian Fault and the earthquake occurrence was propagating towards east on the fault. Damage due to surface faulting, slope stability, liquefaction occurred during these earthquakes. In this paper the strong motion data acquired from these earthquakes at various locations are inspected using both the commonly used Fast Fourier transform and more recent harmonic wavelet analysis developed at Cambridge. Harmonic wavelet analysis is applied to some of the strong motion data obtained to observe the variation of frequency contents with time as the earthquake proceeds. With this analysis a comparison of the accelerations on the same fault was obtained. All the earthquakes had their strongest component in east-west direction and this could be seen with peak accelerations occurring in that direction. The contribution from different frequencies at different time instants to the energy of the signal was observed with the wavelet analysis and energy changes in each of the earthquakes could be seen.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
5th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 2004 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Teymur, Berrak and Madabhushi, S. P. Gopal, "A Comparison of Wavelet Analysis of Strong Motion Data of Kocaeli, Duzce and Pulumur Earthquakes, Turkey" (2004). International Conference on Case Histories in Geotechnical Engineering. 12.
https://scholarsmine.mst.edu/icchge/5icchge/session12/12
A Comparison of Wavelet Analysis of Strong Motion Data of Kocaeli, Duzce and Pulumur Earthquakes, Turkey
New York, New York
In recent years there were several earthquakes in Turkey with magnitudes 7.4, 7.2 and 6 in Kocaeli, Duzce and Pulumur respectively. The first two occurred in 1999 causing the most damage both structurally and economically. The last happened in January 2003. These were all on the North Anatolian Fault and the earthquake occurrence was propagating towards east on the fault. Damage due to surface faulting, slope stability, liquefaction occurred during these earthquakes. In this paper the strong motion data acquired from these earthquakes at various locations are inspected using both the commonly used Fast Fourier transform and more recent harmonic wavelet analysis developed at Cambridge. Harmonic wavelet analysis is applied to some of the strong motion data obtained to observe the variation of frequency contents with time as the earthquake proceeds. With this analysis a comparison of the accelerations on the same fault was obtained. All the earthquakes had their strongest component in east-west direction and this could be seen with peak accelerations occurring in that direction. The contribution from different frequencies at different time instants to the energy of the signal was observed with the wavelet analysis and energy changes in each of the earthquakes could be seen.
