TITLE: GCN CIRCULAR NUMBER: 17921 SUBJECT: Fermi GBM trigger 150612648 is not a GRB DATE: 15/06/12 16:09:40 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 455815977/150612648 at 15:32:54.55 UT on the 12th of June 2015, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is due to a solar flare.”