#ALERT: Geomagnetic K-index of 8 (G4)

[swpc-bot--unoffical]

ALERT: Geomagnetic K-index of 8 (G4)

Space Weather Message Code: ALTK08 Serial Number: 50 Issue Time: 2025 Apr 16 2054 UTC ALERT: Geomagnetic K-index of 8, 9- Threshold Reached: 2025 Apr 16 2055 UTC Synoptic Period: 1800-2100 UTC Active Warning: Yes NOAA Scale: G4 - Severe NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude. Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify. Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur. Navigation - Satellite navigation (GPS) degraded or inoperable for hours. Radio - HF (high frequency) radio propagation sporadic or blacked out. Aurora - Aurora may be seen as low as Alabama and northern California.

[swpc-bot--unoffical]

ALERT: Geomagnetic K-index of 8 (G4)

Space Weather Message Code: ALTK08 Serial Number: 52 Issue Time: 2025 Jun 01 1347 UTC ALERT: Geomagnetic K-index of 8, 9- Threshold Reached: 2025 Jun 01 1346 UTC Synoptic Period: 1200-1500 UTC Active Warning: Yes NOAA Scale: G4 - Severe NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude. Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify. Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur. Navigation - Satellite navigation (GPS) degraded or inoperable for hours. Radio - HF (high frequency) radio propagation sporadic or blacked out. Aurora - Aurora may be seen as low as Alabama and northern California.

[swpc-bot--unoffical]

ALERT: Geomagnetic K-index of 8 (G4)

Space Weather Message Code: ALTK08 Serial Number: 51 Issue Time: 2025 Jun 01 0804 UTC ALERT: Geomagnetic K-index of 8, 9- Threshold Reached: 2025 Jun 01 0800 UTC Synoptic Period: 0600-0900 UTC Active Warning: Yes NOAA Scale: G4 - Severe NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude. Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify. Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur. Navigation - Satellite navigation (GPS) degraded or inoperable for hours. Radio - HF (high frequency) radio propagation sporadic or blacked out. Aurora - Aurora may be seen as low as Alabama and northern California.

[swpc-bot--unoffical]

ALERT: Geomagnetic K-index of 8 (G4)

Space Weather Message Code: ALTK08 Serial Number: 49 Issue Time: 2025 Jan 01 1747 UTC ALERT: Geomagnetic K-index of 8, 9- Threshold Reached: 2025 Jan 01 1741 UTC Synoptic Period: 1500-1800 UTC Active Warning: Yes NOAA Scale: G4 - Severe NOAA Space Weather Scale descriptions can be found at www.swpc.noaa.gov/noaa-scales-explanation Potential Impacts: Area of impact primarily poleward of 45 degrees Geomagnetic Latitude. Induced Currents - Possible widespread voltage control problems and some protective systems may mistakenly trip out key assets from the power grid. Induced pipeline currents intensify. Spacecraft - Systems may experience surface charging; increased drag on low earth orbit satellites, and tracking and orientation problems may occur. Navigation - Satellite navigation (GPS) degraded or inoperable for hours. Radio - HF (high frequency) radio propagation sporadic or blacked out. Aurora - Aurora may be seen as low as Alabama and northern California.