: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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