ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 31 2201 UTC
NOAA Scale: R2 - Moderate
Issue Time: 2024 May 31 2203 UTC
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WARNING: Geomagnetic K-index of 5 expected
Valid From: 2024 May 31 0500 UTC
Valid To: 2024 May 31 1200 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Issue Time: 2024 May 31 0500 UTC
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G2 MODERATE STORM LEVELS POSSIBLE ON 31 MAY - 01 JUN
A CME associated with the X1.4 flare, produced by Region 3697 earlier in the period, is likely to enhance the Earth's magnetic field late on 31 May into early on 01 Jun (UTC). Continue to monitor our web page for updates.

WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
May 30: None (Below G1) May 31: G2 (Moderate) Jun 01: G2 (Moderate)
Issue Time: 2024 May 29 2126 UTC
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ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 29 1840 UTC
NOAA Scale: R2 - Moderate
Issue Time: 2024 May 29 1842 UTC
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Region 3697 (old region 3664 from early May) has survived solar rotation and produced a long-duration X1 (R3; Strong) flare the morning of 29 May.

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 29 1422 UTC
NOAA Scale: R2 - Moderate
Issue Time: 2024 May 29 1425 UTC
bit.ly/3wVgAKH

The Federal Communications Commission’s Public Safety and Homeland Security Bureau (PSHSB or Bureau) seeks comment on any observed impacts to communications that resulted from the May 2024 severe geomagnetic storm. docs.fcc.gov/public/attachm…

An X2.8 Flare from what we believe is old Region 3664 occurred at 27/0708 UTC. Due to its far SE location, energetic particles could take some time to arrive in the near Earth environment.

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 27 0700 UTC
NOAA Scale: R2 - Moderate
Issue Time: 2024 May 27 0704 UTC
bit.ly/3wVgAKH

When a Geomagnetic Storm is happening, what will it impact? Find out here: swpc.noaa.gov/noaa-scales-ex… #SpaceWeather

Curious about how the recent G5 geomagnetic storm compared to other historical events?

A far side halo CME was observed in NASA/SOHO coronagraph imagery early on 20 May. The CME was determined to be from the opposite side of the Sun and not Earth-directed. Old Region 3664 is back there now and is a likely source. Will it return? Visit swpc.noaa.gov

WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
May 19: None (Below G1) May 20: G1 (Minor) May 21: None (Below G1)
Issue Time: 2024 May 18 1952 UTC
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EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1883
Valid From: 2024 May 17 1305 UTC
Now Valid Until: 2024 May 18 1200 UTC
Warning Condition: Persistence
Issue Time: 2024 May 18 0556 UTC
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EXTENDED WARNING: Geomagnetic K-Index of 6 expected
Extension to Serial Number: 525
Valid From: 2024 May 17 1901 UTC
Now Valid Until: 2024 May 18 0600 UTC
Warning Condition: Persistence
Issue Time: 2024 May 17 2301 UTC
bit.ly/3wVgAKH

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 1882
Valid From: 2024 May 17 1305 UTC
Now Valid Until: 2024 May 18 0600 UTC
Warning Condition: Persistence
Issue Time: 2024 May 17 2156 UTC
bit.ly/3wVgAKH

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2024 May 17 2102 UTC
NOAA Scale: R2 - Moderate
Issue Time: 2024 May 17 2105 UTC
bit.ly/3wVgAKH