Infrasound detection and altitude estimation associated with the December 22, 2020 Yushu fireballOPEN ACCESS 

Wei Cheng, Pengxiao Teng, Jun Lyu, Yijing Dai

Geoscience Letters, Volume 8, Article number: 26 (2021)

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“A large bolide was reported at 23:23:33 UTC on December 22, 2020, at a height of ~ 35.5 km at 31.9∘N, 96.2∘E in Yushu, Qinghai Province, China. It is the largest fireball observed in China on record with a TNT equivalent of 9.5 kilotons. Infrasound signals were detected by a four-element infrasound array deployed in Yunnan Province, China. The parameters of this event were obtained using the progressive multi-channel correlation method. The altitude of this event was estimated to be 43.22±15.51km using a ray tracing back-projection algorithm.”