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Dear Collaborators,
Solar activity has been at a low-to-moderate level for the past 24 hours. The largest event was an M2.3 flare at 03:38 UT, happening just now, produced by the limb region NOAA 13683 (S23W89, beta/D-type). This region also produced seven C-class flares yesterday when it was rotating over the west limb. Another region NOAA 13679 produced two low M-class flares (an M1.9 at 05/21/19:19 UT and an M1.5 at 05/22/03:02 UT) plus two C-class flares. Today the target will switch to 13679 as yesterday's target NOAA 13685 has been flare quiet since the last message. 13679 has a beta-gamma/E-type sunspot group and continues showing magnetic flux emergence. Further M-class flares are probable before this region rotates beyond the west limb. The position of NOAA 13679 on May 22 at 03:30 UT is: S09W48 (697", -128") See http://www.SolarMonitor.org for images and http://solar.physics.montana.edu/max_millennium/ops/observing.shtml for a description of the current Max Millennium Observing Plan. Regards, Ying Li (Purple Mountain Observatory)
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