Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 32620

Fermi GBM trigger 686435254/221002852 is not a GRB
2022-10-03T19:24:47Z (2 years ago)
Oliver J Roberts at USRA/NASA <>
O.J. Roberts (USRA/NASA-MSFC) reports on behalf of the Fermi GBM Team:

"The Fermi Gamma-ray Burst Monitor (GBM) trigger 686435254/221002852
at 20:27:29.00 UT on 2 October 2022, tentatively classified as a GRB,
is in fact not due to a GRB. This trigger is likely due to an X-Class solar flare."
Looking for U.S. government information and services? Visit