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Room: Kahtnu 1

Date: 5/2/2024

Session Time: 10:30 AM to 11:45 AM (local time)

Multiplet earthquakes (doublets, triplets, etc.) pose distinct challenges compared to standard mainshock-aftershock sequences, including recurring strong ground motions that can destroy already-damaged buildings and stretch emergency services. The overlapping seismic or surface deformation signals can also complicate the scientific interpretation and response. However, multiplet sequences also have great potential for illuminating earthquake processes such as stress triggering, fault interactions, and rupture nucleation, propagation, and arrest. Notable recent examples include the 6 February 2023 Kahramanmaras, Turkiye Mw 7.8 and 7.6 doublet, the October 2023 Herat, Afghanistan Mw 6.3 quadruplet, the 1 July 2022 Mw 6.0 Hormozgan, Iran doublet, the 14 November 2021 Mw 6.2 and 6.3 Fin, Iran doublet, the 2020 Mw 7.8 and 7.6 Shumagin, Alaska doublet, and the 2019 Minandao, Philippines Mw 6.4–6.8 quadruplet, which together offer a wealth of new data to explore. We solicit work on these and other multiplet sequences that involve seismic analyses, remote sensing, geodesy, field observations, numerical modelling, or combinations of these approaches. We solicit studies that address the progression of fault slip through time (the kinematics) and/or help explain this sequence of events (the dynamics). We also seek contributions that offer insights into why some fault systems may be more prone to multiplets than others, or perhaps even offer suggestions for how these sequences might be better incorporated into seismic hazard analyses. Through in-depth discussions, we aim to emphasize the significance of enhancing international collaboration, implementing monitoring technologies, and establishing disaster preparedness strategies to mitigate the impact of future seismic events.

Conveners:
Aybige Akinci, National Institute of Geophysics and Volcanology (aybige.akinci@ingv.it)
Pınar Büyükakpınar, GFZ Potsdam (pinar@gfz-potsdam.de)

Gareth Funning, University of California, Riverside (gareth@ucr.edu)
Alice-Agnes Gabriel, University of California, San Diego (algabriel@ucsd.edu)
Mohammadreza Jamalreyhani, SUSTech, China (jamalreyhani@sustech.edu.cn)
 
Edwin Nissen, University of Victoria (enissen@uvic.ca)

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