:Product: Solar Region Summary
:Issued: 2026 May 18 0030 UTC
# Prepared jointly by the U.S. Dept. of Commerce, NOAA,
# Space Weather Prediction Center and the U.S. Air Force.
#
Joint USAF/NOAA Solar Region Summary
SRS Number 138 Issued at 0030Z on 18 May 2026
Report compiled from data received at SWO on 17 May
I. Regions with Sunspots. Locations Valid at 17/2400Z
Nmbr Location Lo Area Z LL NN Mag Type
4436 N19W39 332 0100 Dso 03 04 Beta
4438 N20W84 017 0060 Dao 08 05 Beta
4439 N06E55 238 0040 Cso 06 02 Beta
4440 N17E57 236 0030 Hax 01 01 Alpha
4441 N18E14 279 0050 Dao 04 04 Beta
4442 S16E44 249 0020 Cro 03 02 Beta
4443 S15E60 233 0010 Bxo 02 02 Beta
IA. H-alpha Plages without Spots. Locations Valid at 17/2400Z May
Nmbr Location Lo
None
II. Regions Due to Return 18 May to 20 May
Nmbr Lat Lo
4430 N17 192
4425 N06 184
4428 S23 183
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