:Product: Solar Region Summary :Issued: 2026 Apr 28 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 118 Issued at 0030Z on 28 Apr 2026 Report compiled from data received at SWO on 27 Apr I. Regions with Sunspots. Locations Valid at 27/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4420 N16W29 226 0360 Fkc 17 24 Beta-Gamma-Delta 4421 S12W17 214 ...Continue Reading

Official Space Weather Advisory issued by NOAA Space Weather Prediction Center Boulder, Colorado, USA SPACE WEATHER ADVISORY OUTLOOK #26-17 2026 April 26 at 11:47 p.m. MDT (2026 April 27 0547 UTC) **** SPACE WEATHER OUTLOOK **** Summary For April 20-26 R1 (Minor) radio blackouts were observed on 23-26 Apr due to activity from Regions 4419. 4420, 4423, and 4425. R2 (Moderate) radio blackouts were observed on 24 Apr and 26 Apr due to activity from Region 4419 and 4420. R3 (Strong) radio black ...Continue Reading

:Product: Solar Region Summary :Issued: 2026 Apr 27 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 117 Issued at 0030Z on 27 Apr 2026 Report compiled from data received at SWO on 26 Apr I. Regions with Sunspots. Locations Valid at 26/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4420 N16W16 227 0380 Fkc 16 30 Beta-Gamma-Delta 4421 S12W03 213 ...Continue Reading

:Product: Solar Region Summary :Issued: 2026 Apr 25 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 115 Issued at 0030Z on 25 Apr 2026 Report compiled from data received at SWO on 24 Apr I. Regions with Sunspots. Locations Valid at 24/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4419 N15W79 316 0230 Eso 12 07 Beta-Gamma-Delta 4420 N17E10 227 ...Continue Reading

Smoke Shrouds Thailand; Mud Volcano Islands in Azerbaijan   April 24, 2026 Natural Events   This Week's Natural Event Images View the natural events archive Smoke Shrouds Northern Thailand Seasonal fires have darkened skies over Southeast Asia. A School of Mud Volcano Islands in Azerbaijan The tadpole-shaped islands along the Absheron Peninsula were born by explosive mud volcano eruptions and reshaped by erosion.     ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3684 Issue Time: 2026 Apr 24 0505 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3683 Begin Time: 2026 Apr 19 1920 UTC Yesterday Maximum 2MeV Flux: 3446 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.Thank you for using the Product Subscription Service. If you would like to remove a product subscription or updat ...Continue Reading

:Product: Solar Region Summary :Issued: 2026 Apr 24 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 114 Issued at 0030Z on 24 Apr 2026 Report compiled from data received at SWO on 23 Apr I. Regions with Sunspots. Locations Valid at 23/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4419 N15W63 312 0220 Eso 13 07 Beta-Gamma-Delta 4420 N16E25 225 ...Continue Reading

Smoke Shrouds Northern Thailand   April 23, 2026 Natural Events   Latest Natural Event Images View the natural events archive Smoke Shrouds Northern Thailand Seasonal fires have darkened skies over Southeast Asia.     NASA Earth Observatory Where every day is Earth day Visit science.nasa.gov/earth/earth-observatory Follow NASAEarth       NASA Earth Science Division ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3683 Issue Time: 2026 Apr 23 0459 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu Continuation of Serial Number: 3682 Begin Time: 2026 Apr 19 1920 UTC Yesterday Maximum 2MeV Flux: 4922 pfu Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.Thank you for using the Product Subscription Service. If you would like to remove a product subscription or updat ...Continue Reading

:Product: Solar Region Summary :Issued: 2026 Apr 23 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 113 Issued at 0030Z on 23 Apr 2026 Report compiled from data received at SWO on 22 Apr I. Regions with Sunspots. Locations Valid at 22/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4419 N15W50 314 0220 Eao 11 10 Beta 4420 N16E38 225 0180 Dai 1 ...Continue Reading