:Product: Solar Region Summary

:Issued: 2026 Mar 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 77 Issued at 0030Z on 18 Mar 2026
Report compiled from data received at SWO on 17 Mar

I.  Regions with Sunspots.  Locations Valid at 17/2400Z 

Nmbr Location  Lo  Area  Z   LL   NN Mag Type

4391 N07W47   067  0010 Axx  01   01 Alpha

4392 S16E01   018  0200 Csi  07   16 Beta-Gamma

4393 N14W31   049  0030 Cro  06   05 Beta

4395 S06E13   006  0030 Cro  05   10 Beta

IA. H-alpha Plages without Spots.  Locations Valid at 17/2400Z Mar

Nmbr  Location  Lo

4387  N08W61   079

4389  N12W43   061

4390  N26W68   086

4394  S12E04   015

4396  N20E27   351

II. Regions Due to Return 18 Mar to 20 Mar

Nmbr Lat    Lo

4386 N16    256

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