The historic geomagnetic storm continues...

Another series of CMEs associated with flare activity from Region 3664 over the past several days are expected to merge and arrive at Earth by midday (UTC) on 12 May. Periods of G4-G5 (Severe-Extreme) geomagnetic storms are likely to follow the arrival of these CMEs.

EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 105
Valid From: 2024 May 10 1715 UTC
Now Valid Until: 2024 May 12 2359 UTC
Warning Condition: Persistence
Issue Time: 2024 May 11 1753 UTC
bit.ly/3wVgAKH

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 521
Valid From: 2024 May 10 1714 UTC
Now Valid Until: 2024 May 13 1200 UTC
Warning Condition: Persistence
Issue Time: 2024 May 11 1753 UTC
bit.ly/3wVgAKH

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1876
Valid From: 2024 May 10 1700 UTC
Now Valid Until: 2024 May 13 1500 UTC
Warning Condition: Persistence
Issue Time: 2024 May 11 1753 UTC
bit.ly/3wVgAKH

WATCH: Geomagnetic Storm Category G4 or Greater Predicted
Highest Storm Level Predicted by Day:
May 12: G5 (Extreme) May 13: G3 (Strong) May 14: G1 (Minor)
Issue Time: 2024 May 11 1753 UTC
bit.ly/3wVgAKH

Sunspot Region 3664 remains active and continues to produce X-class flares...

The extreme geomagnetic storm continues and will persist through at least Sunday...

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 11 1131 UTC
NOAA Scale: R2 - Moderate
Issue Time: 2024 May 11 1138 UTC
bit.ly/3wVgAKH

EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 104
Valid From: 2024 May 10 1715 UTC
Now Valid Until: 2024 May 11 2359 UTC
Warning Condition: Persistence
Issue Time: 2024 May 11 1120 UTC
bit.ly/3wVgAKH

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 520
Valid From: 2024 May 10 1714 UTC
Now Valid Until: 2024 May 12 0900 UTC
Warning Condition: Persistence
Issue Time: 2024 May 11 1120 UTC
bit.ly/3wVgAKH

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1875
Valid From: 2024 May 10 1700 UTC
Now Valid Until: 2024 May 12 1500 UTC
Warning Condition: Persistence
Issue Time: 2024 May 11 1120 UTC
bit.ly/3wVgAKH

WATCH: Geomagnetic Storm Category G3 Predicted
Highest Storm Level Predicted by Day:
May 11: G4 (Severe) May 12: G3 (Strong) May 13: G3 (Strong)
Issue Time: 2024 May 11 1120 UTC
bit.ly/3wVgAKH

Yet another strong solar flare was recently observed from NOAA Region 3664...

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 11 0115 UTC
NOAA Scale: R2 - Moderate
Issue Time: 2024 May 11 0120 UTC
bit.ly/3wVgAKH

EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 519
Valid From: 2024 May 10 1714 UTC
Now Valid Until: 2024 May 11 1800 UTC
Warning Condition: Onset
Issue Time: 2024 May 10 2357 UTC
bit.ly/3wVgAKH

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1874
Valid From: 2024 May 10 1700 UTC
Now Valid Until: 2024 May 11 2100 UTC
Warning Condition: Persistence
Issue Time: 2024 May 10 2357 UTC
bit.ly/3wVgAKH

EXTENDED WARNING: Geomagnetic K-index of 7 or greater expected
Extension to Serial Number: 103
Valid From: 2024 May 10 1715 UTC
Now Valid Until: 2024 May 11 1200 UTC
Warning Condition: Persistence
Issue Time: 2024 May 10 2348 UTC
bit.ly/3wVgAKH

Extreme (G5) geomagnetic conditions have been observed!

Geomagnetic storming is likely to persist this weekend...