prikaz prve stranice dokumenta High Stress Drop and Slow Rupture During the 2020 MW6.4 Intraplate Petrinja Earthquake, Croatia
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Scientific paper - Original scientific paper
High Stress Drop and Slow Rupture During the 2020 MW6.4 Intraplate Petrinja Earthquake, Croatia
Journal of Geophysical Research: Solid Earth, 130 (2025), 1; e2024JB029107. https://doi.org/10.1029/2024JB029107
Žilić, Iva; Causse, Mathieu; Vallée, Martin; Markušić, Snježana

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Žilić, I., Causse, M., Vallée, M. & Markušić, S. (2025). High Stress Drop and Slow Rupture During the 2020 MW6.4 Intraplate Petrinja Earthquake, Croatia. Journal of Geophysical Research: Solid Earth, 130. (1). doi: 10.1029/2024JB029107

Žilić, Iva, et al. "High Stress Drop and Slow Rupture During the 2020 MW6.4 Intraplate Petrinja Earthquake, Croatia." Journal of Geophysical Research: Solid Earth, vol. 130, no. 1, 2025. https://doi.org/10.1029/2024JB029107

Žilić, Iva, Mathieu Causse, Martin Vallée and Snježana Markušić. "High Stress Drop and Slow Rupture During the 2020 MW6.4 Intraplate Petrinja Earthquake, Croatia." Journal of Geophysical Research: Solid Earth 130, no. 1 (2025). https://doi.org/10.1029/2024JB029107

Žilić, I., et al. (2025) 'High Stress Drop and Slow Rupture During the 2020 MW6.4 Intraplate Petrinja Earthquake, Croatia', Journal of Geophysical Research: Solid Earth, 130(1). doi: 10.1029/2024JB029107

Žilić I, Causse M, Vallée M, Markušić S. High Stress Drop and Slow Rupture During the 2020 MW6.4 Intraplate Petrinja Earthquake, Croatia. Journal of Geophysical Research: Solid Earth [Internet]. 2025 January 16 [cited 2025 March 28];130(1). doi: 10.1029/2024JB029107

I. Žilić, M. Causse, M. Vallée and S. Markušić, "High Stress Drop and Slow Rupture During the 2020 MW6.4 Intraplate Petrinja Earthquake, Croatia", Journal of Geophysical Research: Solid Earth, vol. 130, no. 1, January 2025. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:955843. [Accessed: 28 March 2025]

Metadata
Title (english)High Stress Drop and Slow Rupture During the 2020 MW6.4 Intraplate Petrinja Earthquake, Croatia
AuthorIva Žilić
AuthorMathieu Causse
AuthorMartin Vallée
AuthorSnježana Markušić
Author's institutionUniversity of Zagreb
Faculty of Science
(Department of Geophysics)
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Geophysics
Seismology and Physics of the Earth's Interior
Abstract (english)
Here we analyze the rupture process of the December 29th, 2020 MW6.4 Petrinja earthquake (Croatia), the largest event instrumentally recorded in this area characterized by a moderate strain-rate intraplate setting. We use foreshocks and aftershocks, recorded at more than 80 broadband stations located 70 km to 420 km from the earthquake, as empirical Green's functions (EGFs) to separate source effects from propagation and local site effects. First, we deconvolve the mainshock P-wave time windows... More from the EGFs in the frequency domain to obtain the corner frequency (fc). Spectral analysis based on the Brune's source model reveals a large stress drop of 24 MPa. Next, by deconvolving the Love waves in the time domain, we calculate the Apparent Source Time Functions (ASTFs). We find that the average duration of the source is ~5 s, with no significant directivity effects, indicating a bilateral rupture. To extract physical rupture parameters such as rupture velocity, slip distribution and rise time, we deploy two techniques: (1) Bayesian inversion and (2) backprojection onto isochrones of ASTFs. Both techniques show a low rupture velocity (40-50% of the shear wave velocity) and a rupture length of less than 10 km, i.e. much less than would typically be expected for a magnitude 6.4 earthquake. This apparent anticorrelation between stress drop and rupture velocity may be attributed to the complex and segmented fault system characteristic of immature intraplate settings. Less
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionAccepted version
Journal titleJournal of Geophysical Research: Solid Earth
Numberingvol. 130, no. 1, e2024JB029107
BPC1000 USD
p-ISSN2169-9356
e-ISSN2169-9313
DOIhttps://doi.org/10.1029/2024JB029107
URN:NBNurn:nbn:hr:217:955843
Publication2025-01-16
ProjectNumber: 04-UBS-U-0002/22-90
Title (croatian): Geofizičko-seizmološka istraživanja potresom ugroženih područja u RH i razvoj atenuacijskih relacija predviđanja seizmičkog gibanja tla
Title (english): Investigation of seismically vulnerable areas in Croatia and seismic ground motion assessment
Acronym: CRONOS
Leader: Snježana Markušić
Jurisdiction: Croatia
ProjectNumber: IP-2020-02-3531
Title (croatian): Procjena seizmičkog rizika građevina kulturne baštine u Hrvatskoj
Title (english): Seismic risk assessment of cultural heritage buildings in Croatia
Acronym: SeisRICHerCRO
Leader: Snježana Markušić
Jurisdiction: Croatia
Funding stream: Research Projects
Document URLhttps://agupubs.onlinelibrary.wiley.com/doi/10.1029/2024JB029107
Type of resourceText
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2025-01-21 15:17:11
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