TITLE: GCN CIRCULAR NUMBER: 31932 SUBJECT: Fermi GBM trigger 672128054/220420260 is not a GRB DATE: 22/04/21 14:47:00 GMT FROM: Elisabetta Bissaldi at INFN,Bari E. Bissaldi (Politecnico and INFN Bari) reports on behalf of the Fermi GBM Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 672128054/220420260 at 06:14:09.50 UT on 20 April 2022, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is likely due to a TGF."