The overall-subshear and multi-segment rupture of the 2023 Mw7.8 Kahramanmaraş, Turkey earthquake in millennia supercycle

Xu, Liuwei; Mohanna, Saeed; Meng, Lingsen; Ji, Chen; Ampuero, Jean-Paul; Yunjun, Zhang; Hasnain, Masooma; Chu, Risheng; Liang, Cunren

doi:10.1038/s43247-023-01030-x

Cited by 19 publications

(4 citation statements)

References 92 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In any case, the back-projection results clearly confirm a pattern of rupture branching from the splay fault to the EAF, with a forward component to the NE and a backward component to the SW. Such a pattern has also been confirmed by other research groups employing teleseismic back-projection (Chen et al, 2023;Jia et al, 2023;Zhang et al, 2023;Xu et al, 2023a).…”

Section: Teleseismic Back-projectionsupporting

confidence: 78%

The sharp turn: Backward rupture branching during the 2023 Mw 7.8 Kahramanmaraş (Türkiye) earthquake

Ding,

Xu,

Xie

et al. 2023

Seismica

Self Cite

View full text Add to dashboard Cite

Multiple lines of evidence indicate that the 2023 Mw 7.8 Kahramanmaraş (Türkiye) earthquake started on a splay fault, then branched bilaterally onto the nearby East Anatolian Fault (EAF). This rupture pattern includes one feature previously deemed implausible, called backward rupture branching: rupture propagating from the splay fault onto the SW EAF segment through a sharp corner (with an acute angle between the two faults). To understand this feature, we perform 2.5-D dynamic rupture simulations considering a large set of possible scenarios. We find that both subshear and supershear ruptures on the splay fault can trigger bilateral ruptures on the EAF, which themselves can be either subshear, supershear, or a mixture of the two. In most cases, rupture on the SW segment of the EAF starts after rupture onset on its NE segment: the SW rupture is triggered by the NE rupture. Only when the EAF has initial stresses very close to failure can its SW segment be directly triggered by the initial splay-fault rupture, earlier than the activation of the NE segment. These results advance our understanding of the mechanisms of multi-segment rupture and the complexity of rupture processes, paving the way for a more accurate assessment of earthquake hazards.

show abstract

Section: Teleseismic Back-projectionsupporting

confidence: 78%

The sharp turn: Backward rupture branching during the 2023 Mw 7.8 Kahramanmaraş (Türkiye) earthquake

Ding,

Xu,

Xie

et al. 2023

Seismica

Self Cite

View full text Add to dashboard Cite

show abstract

“…S11F), close to the shear wave velocity. Kinematic rupture models were also obtained by several studies with various reports of rupture behaviors ( 29 – 31 ). We believe that our kinematic model makes considerable improvements over the previous ones by aligning the results of joint inversion of multiple datasets with direct waveform analyses [section S2.6 in ( 18 )].…”

Section: Detailed Rupture Kinematicsmentioning

confidence: 99%

Supershear triggering and cascading fault ruptures of the 2023 Kahramanmaraş, Türkiye, earthquake doublet

Ren,

Wang,

Taymaz

et al. 2024

Science

View full text Add to dashboard Cite

On 6 February 2023, two large earthquakes (moment magnitude 7.8 and 7.6) shocked a vast area of southeastern Türkiye and northern Syria, leading to heavy casualties and economic loss. To investigate the rupture process over multiple fault segments, we performed a comprehensive analysis of local seismic and geodetic data and determined supershear ruptures on the initial branch and the Pazarcık and Erkenek segments and subshear ruptures on the Amanos segment of event 1. The bilateral rupture of event 2 also presents distinct sub- and supershear velocities. The dynamic stress of the branch fault rupture triggered the Pazarcık segment initial rupture at a point 9 kilometers west of the junction of these two faults, boosting the supershear rupture of the Pazarcık segment of the main fault. The geometry and prestress level of multiple segments controlled the rupture behaviors and influenced the ground shaking intensity.

show abstract

“…After the 2023 doublet sequence, many preliminary results of finite-fault source inversion based on strong ground motion, near-field geodetic data and/or teleseismic data have been published (Delouis et al, 2023;Mai et al, 2023;Melgar et al, 2023;Goldberg et al, 2023,a, b;Okuwaki et al, 2023;Xu et al, 2023). However, a highly debated controversy exists regarding the presence of a supershear rupture during the Mw 7.8 event.…”

Section: Manuscript Submitted To Geophysical Research Lettersmentioning

confidence: 99%

Dynamic rupture process of the 2023 Mw 7.8 Kahramanmaraş earthquake (SE Türkiye): Variable rupture speed and implications for seismic hazard

Wang

Zhang

Taymaz

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

The overall-subshear and multi-segment rupture of the 2023 Mw7.8 Kahramanmaraş, Turkey earthquake in millennia supercycle

Cited by 19 publications

References 92 publications

The sharp turn: Backward rupture branching during the 2023 Mw 7.8 Kahramanmaraş (Türkiye) earthquake

The sharp turn: Backward rupture branching during the 2023 Mw 7.8 Kahramanmaraş (Türkiye) earthquake

Supershear triggering and cascading fault ruptures of the 2023 Kahramanmaraş, Türkiye, earthquake doublet

Dynamic rupture process of the 2023 Mw 7.8 Kahramanmaraş earthquake (SE Türkiye): Variable rupture speed and implications for seismic hazard

Contact Info

Product

Resources

About