This is an acknowledgment and remembrance of the contributions and extraordinary collaboration of Dave Jackson and Yan Kagan, both of whom passed away recently. The pair of ingenious scholars made an extraordinary team, devoting their lives to the study of earthquakes, and making countless important contributions to seismology and to science in general.

Yan Y. Kagan and Dave D. Jackson, two of the world’s preeminent scholars on statistical seismology, passed away recently. Yan died on 28 June 2022, and Dave died on 30 March 2023. Their deaths leave not only a wide hole in the field of seismology but also...

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