TITLE: GCN CIRCULAR NUMBER: 18710 SUBJECT: Fermi GBM trigger 472166503/151218890 is not a GRB DATE: 15/12/19 02:42:30 GMT FROM: Peter Jenke at MSFC P. Jenke (UAH) reports on behalf of the Fermi GBM Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 472166503/151218890 at 21:21:39.46 UT on 18 December 2015, tentatively classified as a GRB, is in fact not due to a GRB. This was an accidental trigger."