Live Kp index, solar flares, and viewing forecast — recorded continuously from NOAA SWPC
Space Weather Message Code: WARK04 Serial Number: 5354 Issue Time: 2026 May 29 0541 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 5353 Valid From: 2026 May 27 2347 UTC Now Valid Until: 2026 May 29 1200 UTC Warning Condition: Persistence NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Space Weather Message Code: WARK04 Serial Number: 5353 Issue Time: 2026 May 29 0011 UTC EXTENDED WARNING: Geomagnetic K-index of 4 expected Extension to Serial Number: 5352 Valid From: 2026 May 27 2347 UTC Now Valid Until: 2026 May 29 0600 UTC Warning Condition: Persistence NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Space Weather Message Code: ALTK04 Serial Number: 2661 Issue Time: 2026 May 28 1800 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2026 May 28 1800 UTC Synoptic Period: 1800-2100 Active Warning: YES Comment: NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Space Weather Message Code: ALTK04 Serial Number: 2660 Issue Time: 2026 May 28 1717 UTC CANCELLED ALERT: Geomagnetic K-index of 4 Cancel Serial Number: 2659 Original Issued Time: 2026-05-28T17:06:00 Cancelled 2026-05-28 17:17 by Forecaster User Incorrectly issued. Did not reach threshold. Cancelled 2026-05-28 17:17 by Forecaster User Incorrectly issued. Did not reach threshold. NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
Space Weather Message Code: ALTK04 Serial Number: 2659 Issue Time: 2026 May 28 1706 UTC ALERT: Geomagnetic K-index of 4 Threshold Reached: 2026 May 28 1706 UTC Synoptic Period: 1500-1800 Active Warning: YES Comment: NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.
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