Sunquake with a second bounce, other sunquakes, and emission associated with the X9.3 flare of 6 September 2017 - I. ObservationsSergei Zharkov, Sarah Matthews, Valentina Zharkova, Malcolm Druett, Satoshi Inoue, Ingolf E. Dammasch and Connor MacraeA&A, 639 (2020) A78DOI: https://doi.org/10.1051/0004-6361/201936755
