TITLE: GCN CIRCULAR NUMBER: 31809 SUBJECT: Fermi Gamma-ray Burst Monitor trigger 220331776/670444627 is not a GRB DATE: 22/03/31 19:28:51 GMT FROM: Rachel Hamburg at UAH rkh0007@uah.edu

R. Hamburg (UAH) reports on behalf of the Fermi Gamma-ray Burst Monitor Team:

“The Fermi Gamma-ray Burst Monitor (GBM) trigger 220331776/670444627 at 18:37:02.27 UT on 31 March 2022, tentatively classified as a GRB (GCN 31808), is in fact not due to a GRB. This trigger is due to a solar flare.”