Compound Supershear Rupture During the 2026 Venezuela Earthquake Doublet
Abstract
The 24 June 2026 Venezuela earthquake doublet occurred along a complex transform-fault system. Teleseismic P waves encompassing both cataloged events were analyzed using potency density tensor inversion with seven structure models. All models indicate predominantly eastward rupture over approximately 220 km, including several stages of supershear propagation. Three apparent rupture stalls coincided with changes in the inferred fault orientation, suggesting that fault bends or transitions between fault segments may have influenced rupture propagation. A high-slip-rate subevent occurred about 90 km behind the apparent rupture front 37 s after the origin time of the first event.Whether this subevent reflects back-propagating rupture or a relatively independent rupture episode remains unresolved, but rapid eastward rupture appears to have initiated or resumed afterward. This compound rupture process raises the possibility that parts of the source region experienced repeated strong shaking.
Related
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- Fitful but sustained rupture of the 2026 Mw 7.6 Venezuela earthquake
- Supershear Rupture Indicator in Near-fault Particle Motion
- On-Fault Parameters and Fault Connectivity Control Synthetic Earthquake Catalogs and 30-Year Rupture Probabilities in RSQSim Simulations of the Eastern San Francisco Bay Area
- Bayesian Co- and Postseismic Slip Model of the 2023 Mw 7.8 and 7.7 Türkiye–Syria Earthquake Doublet from Geodetic Data
BibTeX
@misc{yamaguchi2026compound,
title = {{Compound Supershear Rupture During the 2026 Venezuela Earthquake Doublet}},
author = {Ryo Yamaguchi and Naohiro Inoue and Takeshi Saito and Hayato Tanaka and Nozomi Ishida and Bogdan Dumitru Enescu and Tuncay Taymaz and Ryo Okuwaki and Yuji Yagi},
howpublished = {EarthArXiv},
year = {2026},
month = sep,
doi = {10.31223/x5c51x},
url = {https://eartharxiv.org/repository/view/15039/},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Compound Supershear Rupture During the 2026 Venezuela Earthquake Doublet
AU - Ryo Yamaguchi
AU - Naohiro Inoue
AU - Takeshi Saito
AU - Hayato Tanaka
AU - Nozomi Ishida
AU - Bogdan Dumitru Enescu
AU - Tuncay Taymaz
AU - Ryo Okuwaki
AU - Yuji Yagi
PY - 2026
DA - 2026/09/18
PB - EarthArXiv
DO - 10.31223/x5c51x
UR - https://eartharxiv.org/repository/view/15039/
AB - The 24 June 2026 Venezuela earthquake doublet occurred along a complex transform-fault system. Teleseismic P waves encompassing both cataloged events were analyzed using potency density tensor inversion with seven structure models. All models indicate predominantly eastward rupture over approximately 220 km, including several stages of supershear propagation. Three apparent rupture stalls coincided with changes in the inferred fault orientation, suggesting that fault bends or transitions between fault segments may have influenced rupture propagation. A high-slip-rate subevent occurred about 90 km behind the apparent rupture front 37 s after the origin time of the first event.Whether this subevent reflects back-propagating rupture or a relatively independent rupture episode remains unresolved, but rapid eastward rupture appears to have initiated or resumed afterward. This compound rupture process raises the possibility that parts of the source region experienced repeated strong shaking.
ER -