Russia’s Institute of Applied Geophysics reported an M1.1 flare in sunspot group 4545. The Solar Astronomy Laboratory’s log lists the same event as M1.0.
The flare occurred in the X-ray range at 9:48 p.m. Moscow time on October 5 in sunspot group 4545, the Institute of Applied Geophysics said. The institute estimated its duration at about 30 minutes. It said a flare of comparable strength had last been observed roughly a month earlier.
The Solar Astronomy Laboratory, run by the Space Research Institute and the Institute of Solar-Terrestrial Physics, records the peak at 18:48 UTC, matching 9:48 p.m. in Moscow, but classifies the event as M1.0 and lists an interval from 18:36 to 18:57 UTC. The sources therefore agree on the timing and active region but differ slightly on the flare’s class and duration.
M-class flares are strong solar events and can be accompanied by plasma ejections. The Institute of Applied Geophysics did not provide an assessment of possible effects from this particular flare on Earth.