TITLE: GCN CIRCULAR NUMBER: 21944 SUBJECT: Fermi Gamma-ray Burst Monitor trigger 528508320/170930994 is not a GRB DATE: 17/10/01 01:07:34 GMT FROM: Matthew Stanbro at UAH/Fermi M. Stanbro (UAH) reports on behalf of the Fermi GBM Team: The following Fermi Gamma-ray Burst Monitor (GBM) trigger, tentatively classified as a GRB, was in fact likely due to particle activity: 528508320 / 170930994 / 23:51:55.83 UT