Space Weather
From NOAA Space Weather Prediction Center, refreshed every 15 minutes.
2.00
Kp index
Quiet
Solar wind
-- km/s
Aurora · north
0%
Aurora · south
0%
Active alerts
Geomagnetic K-index of 5
July 4, 2026 10:43 AM UTC
minor
Geomagnetic K-index of 5
July 4, 2026 10:43 AM UTC
Space Weather Message Code: ALTK05 Serial Number: 2034 Issue Time: 2026 Jul 04 1043 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2026 Jul 04 1043 UTC Synoptic Period: 0900-1200 Active Warning: YES Noaa Scale: G1 - Minor Comment: NOAA Scale: G1 - Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Geomagnetic K-index of 6
July 4, 2026 8:39 AM UTC
moderate
Geomagnetic K-index of 6
July 4, 2026 8:39 AM UTC
Space Weather Message Code: ALTK06 Serial Number: 721 Issue Time: 2026 Jul 04 0839 UTC ALERT: Geomagnetic K-index of 6 Threshold Reached: 2026 Jul 04 0839 UTC Synoptic Period: 0600-0900 Active Warning: YES Noaa Scale: G2 - Moderate Comment: NOAA Scale: G2 - Moderate NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude. Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible. Radio - HF (high frequency) radio propagation can fade at higher latitudes. Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.
Geomagnetic K-index of 5
July 4, 2026 7:15 AM UTC
minor
Geomagnetic K-index of 5
July 4, 2026 7:15 AM UTC
Space Weather Message Code: ALTK05 Serial Number: 2033 Issue Time: 2026 Jul 04 0715 UTC ALERT: Geomagnetic K-index of 5 Threshold Reached: 2026 Jul 04 0715 UTC Synoptic Period: 0600-0900 Active Warning: YES Noaa Scale: G1 - Minor Comment: NOAA Scale: G1 - Minor NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude. Induced Currents - Weak power grid fluctuations can occur. Spacecraft - Minor impact on satellite operations possible. Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Geomagnetic K-index of 7
July 4, 2026 5:10 AM UTC
strong
Geomagnetic K-index of 7
July 4, 2026 5:10 AM UTC
Space Weather Message Code: ALTK07 Serial Number: 218 Issue Time: 2026 Jul 04 0509 UTC ALERT: Geomagnetic K-index of 7 Threshold Reached: 2026 Jul 04 0509 UTC Synoptic Period: 0300-0600 Active Warning: YES Noaa Scale: G3 - Strong Comment: NOAA Scale: G3 - Strong
Geomagnetic K-index of 7 or greater expected
July 4, 2026 5:01 AM UTC
strong
Geomagnetic K-index of 7 or greater expected
July 4, 2026 5:01 AM UTC
Space Weather Message Code: WARK07 Serial Number: 151 Issue Time: 2026 Jul 04 0501 UTC WARNING: Geomagnetic K-index of 7 or greater expected Valid From: 2026 Jul 04 0500 UTC Valid To: 2026 Jul 05 1200 UTC Warning Conditions: Onset Noaa Scale: G3 - Greater Comment: NOAA Scale: G3 - Greater