A SEISMIC MICROZONATION USING MICROTREMOR AND SEISMIC DATA: SOHAG, EGYPT (A CASE STUDY)
Tarabees, E.; El-Khashab, H.; Abu El-Ata, A.; Marzouk, I.; El-Shahat, A.; Abudeif, A.; Shokry, M. M;
Abstract
Microtremor measurements together with shallow seismic refraction survey have been
conducted and found out to be an effective approach to study the site effect and also to establish a
seismic hazard microzonation overview. The fundamental resonance frequency and amplification
of ground motion at different frequencies were estimated using the microtremor data measured at
ten sites in the new industrial zone around the urban areas in Sohag Governorate, Egypt. Also, site
effects were calculated applying a numerical technique using shear wave velocities observed from
22 shallow seismic profiles measured at the study area utilizing 24-channel shallow seismic
refraction seismograph.
The results show variations in the fundamental resonance frequency values from one site to
another depending on its distance from the Eocene plateau scarp that located at the southern and
south western sides of the study area, where it becomes higher close to the plateau foot. In case of
the low frequency, the amplification of the ground motion shows variation from site to the other site
depending on its vicinity to the plateau, while in case of high frequency the variation depends on the
thickness of the sediment layers. The given results using the microtremor technique showed a good
matching with the results given by the shallow seismic refraction method.
conducted and found out to be an effective approach to study the site effect and also to establish a
seismic hazard microzonation overview. The fundamental resonance frequency and amplification
of ground motion at different frequencies were estimated using the microtremor data measured at
ten sites in the new industrial zone around the urban areas in Sohag Governorate, Egypt. Also, site
effects were calculated applying a numerical technique using shear wave velocities observed from
22 shallow seismic profiles measured at the study area utilizing 24-channel shallow seismic
refraction seismograph.
The results show variations in the fundamental resonance frequency values from one site to
another depending on its distance from the Eocene plateau scarp that located at the southern and
south western sides of the study area, where it becomes higher close to the plateau foot. In case of
the low frequency, the amplification of the ground motion shows variation from site to the other site
depending on its vicinity to the plateau, while in case of high frequency the variation depends on the
thickness of the sediment layers. The given results using the microtremor technique showed a good
matching with the results given by the shallow seismic refraction method.
Other data
Title | A SEISMIC MICROZONATION USING MICROTREMOR AND SEISMIC DATA: SOHAG, EGYPT (A CASE STUDY) | Authors | Tarabees, E. ; El-Khashab, H. ; Abu El-Ata, A. ; Marzouk, I. ; El-Shahat, A. ; Abudeif, A. ; Shokry, M. M | Issue Date | Nov-2005 | Publisher | THE FOURTH INTERNATIONAL CONFERENCE ON THE GEOLOGY OF AFRICA | Series/Report no. | ;Vol. (1), P-P. 739-752 | Conference | THE FOURTH INTERNATIONAL CONFERENCE ON THE GEOLOGY OF AFRICA |
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Microzonation- Final Paper.pdf | A SEISMIC MICROZONATION USING MICROTREMOR AND SEISMIC DATA: SOHAG, EGYPT (A CASE STUDY) | 746.67 kB | Adobe PDF | Request a copy |
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