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.
Data in the archive are available from August 01, 2022.
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.
There are six sunspot groups visible on the disc (NSO/GONG at 11:44 UTC). The largest event over the past 24 hours was an M1.0 flare that occurred in active region NOAA 4392 on March 15, peaking at 09:39 UTC. There are C-class flares expected from active regions NOAA 4392, 4393 and 4395. There is a low chance of an M-class flare occurring. Flare activity is expected to be at a low level. There are two coronal holes on the solar disc.
There are five sunspot groups visible on the disc (ASU CAS/SPS at 06:04 UTC), all of them with NOAA number. The largest event over the last 24 hours was a C8.9 flare that occurred in active region NOAA 4392 on March 13, peaking at 20:23. There are C-class flares expected from region NOAA 4384 and 4392. There is a low chance of an M-class flare occurring. Overall the flare activity is expected to be at a low level. There is one coronal hole on the solar disc.
There are five sunspot groups visible on the disc (ASU CAS/SPS at 06:09 UTC), all of them with NOAA numbers. The largest event over the last 24 hours was an M1.2 flare that occurred in active region NOAA 4384 on March 13, peaking at 09:55. After a filament eruption a CME was detected on March 00:48 in SOHO/LASCO-C2 data. There are C-class flares expected from region NOAA 4384, 4392 and 4393. There is a low chance of an M-class flare occurring. Overall the flare activity is expected to be at a low level. There is one coronal hole on the solar disc.
There are seven sunspot groups visible on the disc (ASU CAS/SPS at 13:35 UTC). The largest event over the past 24 hours was a C4.0 flare that occurred in active region NOAA 4384 on March 12, peaking at 10:46 UTC. C-class flares are expected primarily from active regions NOAA 4384, 4391, 4392, and 4393. Flare activity will be at a very low to low level. There is one coronal hole stretching from N23 to S37.
There are eight sunspot groups visible on the disc (ASU CAS/SPS at 06:21 UTC); one of them is without NOAA number. The largest event over the past 24 hours was a C4.7 flare that occurred in active region NOAA 4381 on March 10, peaking at 18:45 UTC. C-class flares are expected primarily from active regions NOAA 4381, 4387, and 4389. Flare activity will be at a very low to low level. There is one coronal hole stretching from N23 to S37.
There are seven sunspot groups visible on the disc (ASU CAS/SPS at 07:27 UTC); three of them are without NOAA numbers. The largest event over the past 24 hours was a C7.9 flare that occurred in active region NOAA 4387 on March 9, peaking at 20:38 UTC. C-class flares are expected primarily from active regions NOAA 4381, 4387, and 4388. Flare activity will be at a very low to low level. There is one coronal hole stretching from N23 to S32.
There are five sunspot groups visible on the disc (ASU CAS/SPS at 06:30 UTC); one of them is without NOAA number. The largest event over the past 24 hours was a C2.3 flare that occurred in active region NOAA 4381 on March 9, peaking at 12:56 UTC. C-class flares are expected primarily from active regions NOAA 4381 and 4387. Flare activity will be at a very low to low level. There are four coronal holes on the solar disc.
There are three sunspot groups visible on the disc (ASU CAS/SPS at 06:30 UTC). The largest event over the past 24 hours was a C2.1 flare that occurred at coordinates N09E69 on March 8, peaking at 15:07 UTC. C-class flares are expected primarily from active regions NOAA 4381 and 4387. Flare activity will be at a very low to low level. There are four coronal holes on the solar disc.
There are six sunspot groups visible on the disc (ASU CAS/SPS at 06:41 UTC). The largest event over the past 24 hours was a C1.0 flare that occurred in active region NOAA 4385 on March 7, peaking at 10:20 UTC. C-class flares are expected primarily from active regions NOAA 4381, and 4384. Flare activity will be at a very low to low level. There are two coronal holes on the solar disc. The CME was observed by the LASCO-C3 coronagraph at about 01:30 UTC today. The CME is moving in a north-eastward direction.