Discover the latest from NASA Earth Science   July 21, 2026 Weekly News   Latest Images of the Day View the Image of the Day archive Why Maine’s Sandy Shorelines Turn Jagged Differences in the underlying bedrock and how rivers distribute sediment make the coastlines west of Portland look unlike those northeast of the city. Shaping the Emerald City The hills and basins of Seattle, Washington, have been sculpted by glaciers and modified ...Continue Reading

:Product: Solar Region Summary :Issued: 2026 Jul 21 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 202 Issued at 0030Z on 21 Jul 2026 Report compiled from data received at SWO on 20 Jul I. Regions with Sunspots. Locations Valid at 20/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4489 S07W26 192 0120 Cso 05 07 Beta 4491 S11E08 157 0010 Bxo 0 ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3720 Issue Time: 2026 Jul 20 1442 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1,000pfu Continuation of Serial Number: 3719 Begin Time: 2026 Jul 17 1750 UTC Yesterday Maximum 2MeV Flux: 1039 pfu Max time: 2026 Jul 20 1435 UTCThank you for using the Product Subscription Service. If you would like to remove a product subscription or update the personal information in your account, go to the Product Subscription Site. Please do no ...Continue Reading

Official Space Weather Advisory issued by NOAA Space Weather Prediction Center Boulder, Colorado, USA SPACE WEATHER ADVISORY OUTLOOK #26-28 2026 July 19 at 8:00 p.m. MDT (2026 July 20 0200 UTC) **** SPACE WEATHER OUTLOOK **** Summary For July 13-19 No space weather storms were observed during the summary period. Outlook For July 20-26 G1 (Minor) geomagnetic storm levels are likely on 22 Jul due to anticipated coronal hole influence. No other space weather storms are expected during the outl ...Continue Reading

:Product: Solar Region Summary :Issued: 2026 Jul 20 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 201 Issued at 0030Z on 20 Jul 2026 Report compiled from data received at SWO on 19 Jul I. Regions with Sunspots. Locations Valid at 19/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4489 S07W12 191 0170 Cso 03 10 Beta 4491 S11E21 158 0010 Axx 0 ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3719 Issue Time: 2026 Jul 19 1204 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1,000pfu Continuation of Serial Number: 3718 Begin Time: 2026 Jul 17 1750 UTC Yesterday Maximum 2MeV Flux: 1170 pfu Max time: 2026 Jul 18 1715 UTCThank you for using the Product Subscription Service. If you would like to remove a product subscription or update the personal information in your account, go to the Product Subscription Site. Please do no ...Continue Reading

:Product: Solar Region Summary :Issued: 2026 Jul 19 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 200 Issued at 0030Z on 19 Jul 2026 Report compiled from data received at SWO on 18 Jul I. Regions with Sunspots. Locations Valid at 18/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4489 S07W01 193 0170 Hax 03 02 Alpha 4491 S11E36 156 0010 Hrx ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3718 Issue Time: 2026 Jul 18 1526 UTC CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1,000pfu Continuation of Serial Number: 3717 Begin Time: 2026 Jul 17 1750 UTC Yesterday Maximum 2MeV Flux: 1085 pfu Max time: 2026 Jul 18 1520 UTCThank you for using the Product Subscription Service. If you would like to remove a product subscription or update the personal information in your account, go to the Product Subscription Site. Please do no ...Continue Reading

:Product: Solar Region Summary :Issued: 2026 Jul 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 199 Issued at 0030Z on 18 Jul 2026 Report compiled from data received at SWO on 17 Jul I. Regions with Sunspots. Locations Valid at 17/2400Z Nmbr Location Lo Area Z LL NN Mag Type 4489 S07E13 192 0170 Cso 04 04 Beta 4491 S11E50 155 0020 Hrx 0 ...Continue Reading

Space Weather Message Code: ALTEF3 Serial Number: 3717 Issue Time: 2026 Jul 17 1822 UTC ALERT: Electron 2MeV Integral Flux exceeded 1,000pfu Threshold Reached: 2026 Jul 17 1750 UTC Station: GOES-18 Comment: Yesterday's max: 1382 pfu Thank you for using the Product Subscription Service. If you would like to remove a product subscription or update the personal information in your account, go to the Product Subscription Site. Please do not use the from address for correspondence, as it is not ...Continue Reading