Lost and found sunquake in the 6 September 2011 flare caused by beam electrons Connor Macrae, Sergei Zharkov, Valentina Zharkova, Malcolm Druett, Sarah Matthews and Tomoko Kawate A&A, 619 (2018) A65 Published online: 08 November 2018 DOI: 10.1051/0004-6361/201832896