Dear Collaborators,

Solar activity has been at a low level since the last message. The largest event during the period was a C9.7 flare at 19:40 UT on July 20 from NOAA 13373. 13373 was also the source of two low C-class flares. Today the target will switch to 13373 that retains a beta-gamma/D-type configuration. Yesterday's target NOAA 13372 (N23W39) only produced a C1.9 flare but was classified as a beta-gamma/F-type sunspot group again. Please note that NOAA 13379 (N16E61, beta/F-type) rotates on the visible disk and has produced a C2.3 flare. This region is showing mixed polarities in its leading and trailing portions. More C-class flares are expected in the next 24 hours.

The position of NOAA 13373 on July 21 at 03:30 UT

N08W17 (274", 55")

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)