3D physics-based seismic shaking scenarios for city of Zagreb, Capital of Croatia

Znanstveni rad - Izvorni znanstveni rad

• Autor: Helena Latečki https://orcid.org/0000-0002-2632-7920
• Autor: Irene Molinari https://orcid.org/0000-0002-8314-1444
• Autor: Josip Stipčević https://orcid.org/0000-0002-1419-4892
• Autorova ustanova: Sveučilište u Zagrebu; Prirodoslovno-matematički fakultet; (Geofizički odsjek)
• Znanstveno / umjetničko područje, polje i grana: PRIRODNE ZNANOSTI; Geofizika; Seizmologija i fizika unutrašnjosti Zemlje

Sažetak (engleski)

In this work, we assess ground shaking in the wider Zagreb area by computing simulated seismograms at regional distances. For the purposes of the simulations, we assemble the 3D velocity and density model and test its performance. First, we compare the low-frequency simulations obtained using deterministic method for both new 3D model and a simple 1D model. We then continue the performance test by computing the full broadband seismograms. To do that, we apply the hybrid technique in which the low frequency (f < 1 Hz) and high frequency (f = 1–10 Hz) seismograms are obtained separately using deterministic and stochastic method, respectively, and then reconciled into a single time series. We apply this method to the MW = 5.3 event and four smaller (3.0 < MW < 5.0) events that occurred in the studied region. We compare simulated data with the recorded seismograms and validate our results by calculating the goodness of fit score for peak ground velocity and shaking duration. Next, to improve the understanding of the strong ground motion in this area, we simulate seismic shaking scenarios for the 1880, MW = 6.2 earthquake. From computed low-frequency waveforms, we generate shakemaps and compare the ground-motion features of the two possible sources of this event, Kašina fault and North Medvednica fault. We conduct a preliminary study to determine which fault is a more probable source of the 1880 historic event by comparing the peak ground velocities and Arias intensity with the observed intensities.

• Ključne riječi (engleski): seismic velocity model; central Croatia
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Završna verzija rukopisa prihvaćena za objavljivanje (postprint)
• Naslov časopisa: Bulletin of Earthquake Engineering
• Brojčani podaci: vol. 19, br. 12, str. 1-27
• p-ISSN: 1570-761X
• e-ISSN: 1573-1456
• DOI: https://doi.org/10.1007/s10518-021-01227-5
• URN:NBN: urn:nbn:hr:217:263664
• Datum objave publikacije: 2021-09-17
• Projekt: Šifra: IP-2020-02-3960; Naziv (hrvatski): Karakterizacija i monitoring rasjednog sustava šireg dubrovačkog područja; Naziv (engleski): Characterization and monitoring of the Dubrovnik fault system; Kratica: DuFAULT; Voditelj: Josip Stipčević; Pravna nadležnost: Hrvatska; Financijer: HRZZ; Linija financiranja: IP
• URL dokumenta: https://link.springer.com/article/10.1007/s10518-021-01227-5
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Javna napomena: This is a post-print version accepted by the journal, but does not contain journal layout. According to the self-archiving policy of the publisher and the one-year embargo rule, the post-print version of the paper will become publicly available on September 17, 2022. DOI link: https://doi.org/10.1007/s10518-021-01227-5.
• Datum i vrijeme pohrane: 2021-09-21 08:24:22