Long-period directivity pulses of strong ground motion during the 2023 Mw7.8 Kahramanmaras earthquake

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10473400" target="_blank" >RIV/00216208:11320/23:10473400 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=RV.VvvT-Ts" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=RV.VvvT-Ts</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s43247-023-01076-x" target="_blank" >10.1038/s43247-023-01076-x</a>

Result language
angličtina
Original language name
Long-period directivity pulses of strong ground motion during the 2023 Mw7.8 Kahramanmaras earthquake
Original language description
Damages due to large earthquakes are influenced by broadband source effects that remain enigmatic. Here we develop a broadband (0-10 Hz) source model of the disastrous 2023 Mw7.8 Kahramanmaras, Turkiye, earthquake by modeling recordings of 100 stations. The model combines coherent and incoherent rupture propagation at low and high frequencies, respectively. We adopt a planar 300 km long kinked fault geometry from geology and pre-constrain the slip model from seismic and geodetic data. We demonstrate that the southwestward rupture propagation was delayed by similar to 15 s and that the observed strong waveform pulses can be explained by the directivity effect due to a specific combination of the coherent and incoherent components. We show that even a rough estimate of major rupture parameters makes the ground motion simulations of such large events possible, and may thus improve the efficiency of rapid, physics-based, shaking estimation for emergency response and seismic hazard assessment.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10500 - Earth and related environmental sciences

Project
<a href="/en/project/GA23-06345S" target="_blank" >GA23-06345S: Seismo-geodynamic modeling of the Hellenic subduction</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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