Visibility Graph Analysis of Seismicity around Enguri High Arch Dam, Caucasus

Brief Report| August 14, 2018 Visibility Graph Analysis of Seismicity around Enguri High Arch Dam, Caucasus Luciano Telesca; Luciano Telesca aInstitute of Methodologies for Environmental Analysis, National Research Council, 85050 Tito (PZ), Italy Search for other works by this author on: GSW Google Scholar Tamaz Chelidze Tamaz Chelidze bM. Nodia Institute of Geophysics at Iv. Javakhishvili Tbilisi State University, 0160 Tbilisi, Georgia, tamaz.chelidze@gmail.com Search for other works by this author on: GSW Google Scholar Author and Article Information Luciano Telesca aInstitute of Methodologies for Environmental Analysis, National Research Council, 85050 Tito (PZ), Italy Tamaz Chelidze bM. Nodia Institute of Geophysics at Iv. Javakhishvili Tbilisi State University, 0160 Tbilisi, Georgia, tamaz.chelidze@gmail.com Publisher: Seismological Society of America First Online: 14 Aug 2018 Online Issn: 1943-3573 Print Issn: 0037-1106 © Seismological Society of America Bulletin of the Seismological Society of America (2018) 108 (5B): 3141–3147. https://doi.org/10.1785/0120170370 Article history First Online: 14 Aug 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Luciano Telesca, Tamaz Chelidze; Visibility Graph Analysis of Seismicity around Enguri High Arch Dam, Caucasus. Bulletin of the Seismological Society of America 2018;; 108 (5B): 3141–3147. doi: https://doi.org/10.1785/0120170370 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 The visibility graph method is applied to the interevent times, interevent distances, and magnitude sequences of the seismicity that occurred around the Enguri dam, Georgia, from 1974 to 1989 and from 2009 to 2016, to calculate the so‐called mean connectivity degree. The time variation of the mean connectivity degree of the three seismic series shows the presence of periods in which it is beyond the 95% confidence band, consistent with significant time‐clustering behavior (measured by the coefficient of variation of the interevent times). In particular, the anomalous behavior of the mean connectivity degree between 1979 and 1981 is probably linked with the initial filling of the dam that started in 1978 and ended in 1984; whereas most of the anomalous mean connectivity degree identified after 1984 can be considered as co‐ and preseismic signatures of a few large earthquakes that struck the area. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.