Solar activity is a main driver for space weather in our Solar system. The daily space weather bulletin is a text report that briefly summarizes current solar activity (sunspot groups, active prominences, etc.) visible on the solar disc for past 24h and predicts its evolution for maximum of 24h. For preparation of the bulletin an observer/forecaster on duty at SPS site exploites observations made on the site (sunspot drawings, classification, white light and Halpha images) as well as other relevant publicly available solar data.
There are seven sunspot groups visible on the disc (ASU CAS/SPS at 07:35 UTC), one of them is without NOAA number and it is located at coordinates S08E31 (Axx). The largest event over the last 24 hours was an M2.8 flare that occurred in active region NOAA 4392 on March 16, peaking at 12:15 UTC. There are C-class flares expected from regions NOAA 4392, 4393, and 4395. There is a low chance of an M-class flare occurring. Overall flare activity is expected to be at a low level. There are three coronal holes on the solar disc.