Spatial and Temporal Variation of Coda-Wave Attenuation in the Faryab Region, Southeast of the Sanandaj-Sirjan Zone, Using Aftershocks of the Tiab Earthquake of 28 February 2006

Abstract

Research Article| December 03, 2013 Spatial and Temporal Variation of Coda‐Wave Attenuation in the Faryab Region, Southeast of the Sanandaj–Sirjan Zone, Using Aftershocks of the Tiab Earthquake of 28 February 2006 Abbas Gholamzadeh; Abbas Gholamzadeh aDepartment of Physics, Faculty of Science, University of Hormozgan, P.O. Box 3995, Bandar Abbas, [e-mail]@gmail.com Search for other works by this author on: GSW Google Scholar Habib Rahimi; Habib Rahimi bInstitute of Geophysics, University of Tehran, Tehran 14155‐6466, [e-mail] Search for other works by this author on: GSW Google Scholar Farzam Yaminifard Farzam Yaminifard cInternational Institute of Earthquake Engineering and Seismology, 21 Arghavan St., N. Dibaji, Farmanieh, Tehran 19537‐14453, [e-mail] Search for other works by this author on: GSW Google Scholar Bulletin of the Seismological Society of America (2014) 104 (1): 529–539. https://doi.org/10.1785/0120130072 Article history first online: 14 Jul 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Abbas Gholamzadeh, Habib Rahimi, Farzam Yaminifard; Spatial and Temporal Variation of Coda‐Wave Attenuation in the Faryab Region, Southeast of the Sanandaj–Sirjan Zone, Using Aftershocks of the Tiab Earthquake of 28 February 2006. Bulletin of the Seismological Society of America 2013;; 104 (1): 529–539. doi: https://doi.org/10.1785/0120130072 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract Coda quality factor (Qc) estimates for the Faryb region in the southeast Zagros have been obtained by using aftershock data of the Tiab earthquake of 28 February 2006, recorded within an epicentral distance of 100 km. More than 394 earthquakes were recorded by a local temporary network consisting of 9 short‐period stations installed for one month after 28 February 2006. Qc was estimated using the single‐backscattering model in frequency bands of 0.5–24 Hz. In this research, the spatial and temporal variation of Qc in the Sanandaj–Sirjan zone is studied. To explore the lateral variation, Qc is calculated for nine stations and in different parts of the covered area. The lowest values are derived in KALI station in the southern part and the higher value in BAGA station in the northern part, but generally there is an absence of significant lateral variation in coda Qc in the Faryab region. To investigate the attenuation variation with depth, Qc value was calculated for eight lapse times. The average frequency relation for this region is Qc=(28±1.1)f (1.14±0.01) at 5 s lapse time window length and Qc=(105±1.3)f (0.98±0.047) at 30 s lapse time window length. Qc increases with depth; however, the rate of increase of Qc is not uniform with depth in the study area. Beneath the Faryab region, the rate of increase of Qc is greater at depths less than 49 km (compared to larger depths), indicating a low attenuation structure at less than ∼49 km depth, which is the Moho depth in this region. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.