Pre-earthquake signals associated with the Kahramanmaraş sequence in Turkey on February 6th, 2023, shown with multi-parameter analysis

0581818 - ÚGN 2024 RIV US eng A - Abstrakt
Ouzounov, D. - Inan, S. - Kalenda, P. - Pulinets, S. - Liu, J. Y. - Shen, X. - Yan, R. - Rušajová, Jana - Kafatos, M. C. - Taylor, P.
Pre-earthquake signals associated with the Kahramanmaraş sequence in Turkey on February 6th, 2023, shown with multi-parameter analysis.
AGU23 WIDE.OPEN.SCIENCE. San Francisco: American Geophysical Union, 2023. s. 1-1.
[AGU 2023. 11.12.2023-15.12.2023, San Francisco]
Institucionální podpora: RVO:68145535
Klíčová slova: precusors * earthquake * ionosphere
Obor OECD: Physical geography
https://www.agu.org/fall-meeting

On Feb 6, 2023, M7.8 and M7.5 earthquakes struck Kahramanmaraş, Turkey, within nine hours period, with a more than 100 km rupture. These were the deadliest earthquakes in Turkey, claiming more than 50 thousand lives and catastrophic damage. We studied critical lithosphere/atmosphere /ionosphere coupling processes that precede earthquakes. Soon after the Kahramanmaraş earthquakes, we started collecting multi-parameter data from ground, atmosphere, and satellite observations, such: as 1/ Vertical static pendulums from the European network, 2/ Hydrogeochemical data for electrical conductivity and major ion contents from the spring water samples near Kahramanmaraş, 3/ Outgoing long-wavelength radiation (OLR) obtained from satellites NPOESS, 4/ Ionospheric plasma observations from China/Italy Seismo-Electromagnetic Satellite (CSES1),5/Electron density variations in the ionosphere via GPS Total Electron Content (GPS/TEC), and 6/ Atmospheric chemical potential (ACP) obtained from NASA assimilation models. We have detected two temporal groups of pre-earthquake anomalies: A/ few months in advance - hydrogeochemical anomalies lasting up to six months and vertical static pendulums lasting two months ahead of the seismic rupture and B/few days in advance - OLR and ACP anomalies showed an abnormal increase on Jan 15-30, along with the plasma electron and oxygen ion density from the CSES1 satellite which is strongly correlated with electron density variations in the ionosphere from GPS/TEC. The two groups of identified anomalies are probably associated with different stages of Kahramanmaraş earthquake preparation processes. Group A is likely to be linked to the pre-earthquake crustal deformation phase, and Group B is associated with the coupling processes lithosphere-atmosphere. We show that we could identify abnormal patterns associated with the different stages of earthquake preparation processes by combining ground and near-space data according to the physical concept of LAIC.
Trvalý link: https://hdl.handle.net/11104/0349974