TITLE: GCN CIRCULAR NUMBER: 15377 SUBJECT: Fermi GBM trigger 13121024.436 is not a GRB DATE: 13/10/25 08:52:17 GMT FROM: Suzanne Foley at MPE S. Foley (UCD) reports on behalf of the Fermi GBM Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 404303265 (13121024.436) at 10:27:42.30 UT on 24 October 2013, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is due to a solar flare."