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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68145535%3A_____%2F23%3A00581818" target="_blank" >RIV/68145535:_____/23:00581818 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

10508 - Physical geography

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů