Live geomagnetic storm, solar flare, radio blackout, and radiation storm notices from NOAA's Space Weather Prediction Center . Refreshed every 5 minutes with plain-English explanations.
Updated Nov 5, 13:21 UTC
Active Now
G1watchNov 4, 19:04 UTC
G1 Geomagnetic Storm Watch
A minor geomagnetic storm. Aurora possible in far-northern states (Michigan, Maine). Little to no impact on power or radio. Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
What Does This Mean for You?
This is a minor geomagnetic storm (G1). For most people going about everyday life, there is little to notice. Effects are generally limited to weak power grid fluctuations and minor satellite operations impacts.
You might notice: For almost everyone, nothing noticeable. If you're at a very high latitude, a faint aurora display is possible.
Do you need to do anything? No action is needed for most people. If you rely on precision GPS or amateur/HF radio, be aware that minor drift or interference is possible.
Who's most affected: Mainly aurora photographers and observers at very high latitudes. The general public is unlikely to be affected.
Set your location elsewhere on the site for a personalized aurora check.
Minimal everyday impact
Show official NOAA alert text
Space Weather Message Code: WATA20
Serial Number: 1135
Issue Time: 2026 Nov 04 1904 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Nov 05: None (Below G1) Nov 06: G1 (Minor) Nov 07: G1 (Minor)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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 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.
Recent Notices & Summaries
InfoalertNov 5, 12:54 UTC
Electron Flux Enhancement Alert
Energetic electron flux (above 2 MeV) measured by NOAA's GOES satellites has exceeded 1,000 pfu. This matters mainly to satellite operators, since these electrons can charge spacecraft electronics. It has no direct effect on people on the ground.
What Does This Mean for You?
This is an energetic-electron notice from satellites in geostationary orbit. It describes conditions at satellite altitudes, not a storm affecting people at the surface.
You might notice: Nothing directly -- it does not affect phones, power or the weather.
Do you need to do anything? No action is needed for the general public.
Who's most affected: Mainly satellite operators, since high electron flux can charge spacecraft electronics.
Minimal everyday impact
Show official NOAA alert text
Space Weather Message Code: ALTEF3
Serial Number: 3767
Issue Time: 2026 Nov 05 1254 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1,000pfu
Continuation of Serial Number: 3766
Begin Time: 2026 Nov 01 1302 UTC
Yesterday Maximum 2MeV Flux: 1477 pfu
Max time: 2026 Nov 04 1425 UTC
InfoalertNov 4, 14:47 UTC
Electron Flux Enhancement Alert
Energetic electron flux (above 2 MeV) measured by NOAA's GOES satellites has exceeded 1,000 pfu. This matters mainly to satellite operators, since these electrons can charge spacecraft electronics. It has no direct effect on people on the ground.
What Does This Mean for You?
This is an energetic-electron notice from satellites in geostationary orbit. It describes conditions at satellite altitudes, not a storm affecting people at the surface.
You might notice: Nothing directly -- it does not affect phones, power or the weather.
Do you need to do anything? No action is needed for the general public.
Who's most affected: Mainly satellite operators, since high electron flux can charge spacecraft electronics.
Minimal everyday impact
Show official NOAA alert text
Space Weather Message Code: ALTEF3
Serial Number: 3766
Issue Time: 2026 Nov 04 1447 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1,000pfu
Continuation of Serial Number: 3765
Begin Time: 2026 Nov 01 1302 UTC
Yesterday Maximum 2MeV Flux: 4077 pfu
Max time: 2026 Nov 03 1620 UTC
InfowarningNov 4, 08:19 UTC
Kp 4 Geomagnetic Activity Warning
Elevated geomagnetic activity. Aurora possible in high-latitude regions. Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
What Does This Mean for You?
Geomagnetic activity is elevated (Kp 4) but below the G1 storm threshold (Kp 5), so this is not a geomagnetic storm. For most people going about everyday life, there is nothing to notice.
You might notice: For almost everyone, nothing noticeable. If you're at a very high latitude, a faint aurora display is possible.
Do you need to do anything? No action is needed for most people. If you rely on precision GPS or amateur/HF radio, be aware that minor drift or interference is possible.
Who's most affected: Mainly aurora photographers and observers at very high latitudes. The general public is unlikely to be affected.
Set your location elsewhere on the site for a personalized aurora check.
Minimal everyday impact
Show official NOAA alert text
Space Weather Message Code: WARK04
Serial Number: 5447
Issue Time: 2026 Nov 04 0819 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Nov 04 0819 UTC
Valid To: 2026 Nov 04 1500 UTC
Warning Conditions: Onset
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.
InfoalertNov 3, 05:02 UTC
Electron Flux Enhancement Alert
Energetic electron flux (above 2 MeV) measured by NOAA's GOES satellites has exceeded 1,000 pfu. This matters mainly to satellite operators, since these electrons can charge spacecraft electronics. It has no direct effect on people on the ground.
What Does This Mean for You?
This is an energetic-electron notice from satellites in geostationary orbit. It describes conditions at satellite altitudes, not a storm affecting people at the surface.
You might notice: Nothing directly -- it does not affect phones, power or the weather.
Do you need to do anything? No action is needed for the general public.
Who's most affected: Mainly satellite operators, since high electron flux can charge spacecraft electronics.
Minimal everyday impact
Show official NOAA alert text
Space Weather Message Code: ALTEF3
Serial Number: 3765
Issue Time: 2026 Nov 03 0502 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1,000pfu
Continuation of Serial Number: 3764
Begin Time: 2026 Nov 01 1302 UTC
Yesterday Maximum 2MeV Flux: 4481 pfu
Max time: 2026 Nov 02 1540 UTC
InfoalertNov 2, 12:03 UTC
Electron Flux Enhancement Alert
Energetic electron flux (above 2 MeV) measured by NOAA's GOES satellites has exceeded 1,000 pfu. This matters mainly to satellite operators, since these electrons can charge spacecraft electronics. It has no direct effect on people on the ground.
What Does This Mean for You?
This is an energetic-electron notice from satellites in geostationary orbit. It describes conditions at satellite altitudes, not a storm affecting people at the surface.
You might notice: Nothing directly -- it does not affect phones, power or the weather.
Do you need to do anything? No action is needed for the general public.
Who's most affected: Mainly satellite operators, since high electron flux can charge spacecraft electronics.
Minimal everyday impact
Show official NOAA alert text
Space Weather Message Code: ALTEF3
Serial Number: 3764
Issue Time: 2026 Nov 02 1203 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1,000pfu
Continuation of Serial Number: 3763
Begin Time: 2026 Nov 01 1302 UTC
Yesterday Maximum 2MeV Flux: 5350 pfu
Max time: 2026 Nov 01 1550 UTC
InfowarningNov 1, 14:57 UTC
Kp 4 Geomagnetic Activity Warning
Elevated geomagnetic activity. Aurora possible in high-latitude regions. Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
What Does This Mean for You?
Geomagnetic activity is elevated (Kp 4) but below the G1 storm threshold (Kp 5), so this is not a geomagnetic storm. For most people going about everyday life, there is nothing to notice.
You might notice: For almost everyone, nothing noticeable. If you're at a very high latitude, a faint aurora display is possible.
Do you need to do anything? No action is needed for most people. If you rely on precision GPS or amateur/HF radio, be aware that minor drift or interference is possible.
Who's most affected: Mainly aurora photographers and observers at very high latitudes. The general public is unlikely to be affected.
Set your location elsewhere on the site for a personalized aurora check.
Minimal everyday impact
Show official NOAA alert text
Space Weather Message Code: WARK04
Serial Number: 5446
Issue Time: 2026 Nov 01 1457 UTC
EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 5445
Valid From: 2026 Oct 31 1235 UTC
Now Valid Until: 2026 Nov 01 2359 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.
InfoalertNov 1, 13:02 UTC
Electron Flux Enhancement Alert
Energetic electron flux (above 2 MeV) measured by NOAA's GOES satellites has exceeded 1,000 pfu. This matters mainly to satellite operators, since these electrons can charge spacecraft electronics. It has no direct effect on people on the ground.
What Does This Mean for You?
This is an energetic-electron notice from satellites in geostationary orbit. It describes conditions at satellite altitudes, not a storm affecting people at the surface.
You might notice: Nothing directly -- it does not affect phones, power or the weather.
Do you need to do anything? No action is needed for the general public.
Who's most affected: Mainly satellite operators, since high electron flux can charge spacecraft electronics.
Minimal everyday impact
Show official NOAA alert text
Space Weather Message Code: ALTEF3
Serial Number: 3763
Issue Time: 2026 Nov 01 1302 UTC
ALERT: Electron 2MeV Integral Flux exceeded 1,000pfu
Threshold Reached: 2026 Nov 01 1302 UTC
Station: GOES-19
Comment:
G1alertNov 1, 01:17 UTC
G1 Geomagnetic Storm Alert
A minor geomagnetic storm. Aurora possible in far-northern states (Michigan, Maine). Little to no impact on power or radio. Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
What Does This Mean for You?
This is a minor geomagnetic storm (G1). For most people going about everyday life, there is little to notice. Effects are generally limited to weak power grid fluctuations and minor satellite operations impacts.
You might notice: For almost everyone, nothing noticeable. If you're at a very high latitude, a faint aurora display is possible.
Do you need to do anything? No action is needed for most people. If you rely on precision GPS or amateur/HF radio, be aware that minor drift or interference is possible.
Who's most affected: Mainly aurora photographers and observers at very high latitudes. The general public is unlikely to be affected.
Set your location elsewhere on the site for a personalized aurora check.
Minimal everyday impact
Show official NOAA alert text
Space Weather Message Code: ALTK05
Serial Number: 2060
Issue Time: 2026 Nov 01 0117 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Nov 01 0117 UTC
Synoptic Period: 0000-0300
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.
G1warningNov 1, 00:08 UTC
G1 Geomagnetic Storm Warning
A minor geomagnetic storm. Aurora possible in far-northern states (Michigan, Maine). Little to no impact on power or radio. Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
What Does This Mean for You?
This is a minor geomagnetic storm (G1). For most people going about everyday life, there is little to notice. Effects are generally limited to weak power grid fluctuations and minor satellite operations impacts.
You might notice: For almost everyone, nothing noticeable. If you're at a very high latitude, a faint aurora display is possible.
Do you need to do anything? No action is needed for most people. If you rely on precision GPS or amateur/HF radio, be aware that minor drift or interference is possible.
Who's most affected: Mainly aurora photographers and observers at very high latitudes. The general public is unlikely to be affected.
Set your location elsewhere on the site for a personalized aurora check.
Minimal everyday impact
Show official NOAA alert text
Space Weather Message Code: WARK05
Serial Number: 2274
Issue Time: 2026 Nov 01 0008 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Nov 01 0007 UTC
Valid To: 2026 Nov 01 0900 UTC
Warning Conditions: Persistence
Noaa Scale: G1 - Minor
Comment: Re-issued due to technical issues with end date of previous warning.
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.
G2alertOct 31, 19:14 UTC
G2 Geomagnetic Storm Alert
A moderate geomagnetic storm. Aurora may reach New York, Idaho. Some radio and GPS drift possible. Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
What Does This Mean for You?
This is a moderate geomagnetic storm (G2). Most people won't notice anything directly, though some specialized systems may be affected. Some voltage corrections may be needed on power grids, and high-latitude satellite operations may see effects.
You might notice: aurora may be visible farther from the poles than usual, such as the northern-tier US and northern Europe. Otherwise, most people at typical latitudes won't notice anything in daily life.
Do you need to do anything? No action is needed for most people. If you rely on precision GPS or amateur/HF radio, be aware that minor drift or interference is possible.
Who's most affected: Power grid operators, satellite operators, GPS-precision users (surveying, agriculture, aviation), and high-frequency radio operators are the groups most likely to see real effects. The general public at typical latitudes is unlikely to notice everyday impacts.
Set your location elsewhere on the site for a personalized aurora check.
Some specialized impacts possible
Show official NOAA alert text
Space Weather Message Code: ALTK06
Serial Number: 729
Issue Time: 2026 Oct 31 1914 UTC
ALERT: Geomagnetic K-index of 6
Threshold Reached: 2026 Oct 31 1914 UTC
Synoptic Period: 1800-2100
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.
G2warningOct 31, 19:08 UTC
G2 Geomagnetic Storm Warning
A moderate geomagnetic storm. Aurora may reach New York, Idaho. Some radio and GPS drift possible. Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
What Does This Mean for You?
This is a moderate geomagnetic storm (G2). Most people won't notice anything directly, though some specialized systems may be affected. Some voltage corrections may be needed on power grids, and high-latitude satellite operations may see effects.
You might notice: aurora may be visible farther from the poles than usual, such as the northern-tier US and northern Europe. Otherwise, most people at typical latitudes won't notice anything in daily life.
Do you need to do anything? No action is needed for most people. If you rely on precision GPS or amateur/HF radio, be aware that minor drift or interference is possible.
Who's most affected: Power grid operators, satellite operators, GPS-precision users (surveying, agriculture, aviation), and high-frequency radio operators are the groups most likely to see real effects. The general public at typical latitudes is unlikely to notice everyday impacts.
Set your location elsewhere on the site for a personalized aurora check.
Some specialized impacts possible
Show official NOAA alert text
Space Weather Message Code: WARK06
Serial Number: 673
Issue Time: 2026 Oct 31 1908 UTC
WARNING: Geomagnetic K-index of 6 expected
Valid From: 2026 Oct 31 1908 UTC
Valid To: 2026 Oct 31 2359 UTC
Warning Conditions: Onset
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.
G1alertOct 31, 19:07 UTC
G1 Geomagnetic Storm Alert
A minor geomagnetic storm. Aurora possible in far-northern states (Michigan, Maine). Little to no impact on power or radio. Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
What Does This Mean for You?
This is a minor geomagnetic storm (G1). For most people going about everyday life, there is little to notice. Effects are generally limited to weak power grid fluctuations and minor satellite operations impacts.
You might notice: For almost everyone, nothing noticeable. If you're at a very high latitude, a faint aurora display is possible.
Do you need to do anything? No action is needed for most people. If you rely on precision GPS or amateur/HF radio, be aware that minor drift or interference is possible.
Who's most affected: Mainly aurora photographers and observers at very high latitudes. The general public is unlikely to be affected.
Set your location elsewhere on the site for a personalized aurora check.
Minimal everyday impact
Show official NOAA alert text
Space Weather Message Code: ALTK05
Serial Number: 2059
Issue Time: 2026 Oct 31 1907 UTC
ALERT: Geomagnetic K-index of 5
Threshold Reached: 2026 Oct 31 1907 UTC
Synoptic Period: 1800-2100
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.
G1warningOct 31, 19:04 UTC
G1 Geomagnetic Storm Warning
A minor geomagnetic storm. Aurora possible in far-northern states (Michigan, Maine). Little to no impact on power or radio. Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
What Does This Mean for You?
This is a minor geomagnetic storm (G1). For most people going about everyday life, there is little to notice. Effects are generally limited to weak power grid fluctuations and minor satellite operations impacts.
You might notice: For almost everyone, nothing noticeable. If you're at a very high latitude, a faint aurora display is possible.
Do you need to do anything? No action is needed for most people. If you rely on precision GPS or amateur/HF radio, be aware that minor drift or interference is possible.
Who's most affected: Mainly aurora photographers and observers at very high latitudes. The general public is unlikely to be affected.
Set your location elsewhere on the site for a personalized aurora check.
Minimal everyday impact
Show official NOAA alert text
Space Weather Message Code: WARK05
Serial Number: 2273
Issue Time: 2026 Oct 31 1904 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Oct 31 1901 UTC
Valid To: 2026 Oct 31 2359 UTC
Warning Conditions: Onset
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.
InfoalertOct 31, 18:47 UTC
Kp 4 Geomagnetic Activity Alert
Elevated geomagnetic activity. Aurora possible in high-latitude regions. Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
What Does This Mean for You?
Geomagnetic activity is elevated (Kp 4) but below the G1 storm threshold (Kp 5), so this is not a geomagnetic storm. For most people going about everyday life, there is nothing to notice.
You might notice: For almost everyone, nothing noticeable. If you're at a very high latitude, a faint aurora display is possible.
Do you need to do anything? No action is needed for most people. If you rely on precision GPS or amateur/HF radio, be aware that minor drift or interference is possible.
Who's most affected: Mainly aurora photographers and observers at very high latitudes. The general public is unlikely to be affected.
Set your location elsewhere on the site for a personalized aurora check.
Minimal everyday impact
Show official NOAA alert text
Space Weather Message Code: ALTK04
Serial Number: 2696
Issue Time: 2026 Oct 31 1847 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Oct 31 1845 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.
InfowarningOct 31, 12:20 UTC
Kp 4 Geomagnetic Activity Warning
Elevated geomagnetic activity. Aurora possible in high-latitude regions. Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
What Does This Mean for You?
Geomagnetic activity is elevated (Kp 4) but below the G1 storm threshold (Kp 5), so this is not a geomagnetic storm. For most people going about everyday life, there is nothing to notice.
You might notice: For almost everyone, nothing noticeable. If you're at a very high latitude, a faint aurora display is possible.
Do you need to do anything? No action is needed for most people. If you rely on precision GPS or amateur/HF radio, be aware that minor drift or interference is possible.
Who's most affected: Mainly aurora photographers and observers at very high latitudes. The general public is unlikely to be affected.
Set your location elsewhere on the site for a personalized aurora check.
Minimal everyday impact
Show official NOAA alert text
Space Weather Message Code: WARK04
Serial Number: 5445
Issue Time: 2026 Oct 31 1220 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Oct 31 1235 UTC
Valid To: 2026 Nov 01 1500 UTC
Warning Conditions: Onset
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.
G1warningOct 30, 23:11 UTC
G1 Geomagnetic Storm Warning
A minor geomagnetic storm. Aurora possible in far-northern states (Michigan, Maine). Little to no impact on power or radio. Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
What Does This Mean for You?
This is a minor geomagnetic storm (G1). For most people going about everyday life, there is little to notice. Effects are generally limited to weak power grid fluctuations and minor satellite operations impacts.
You might notice: For almost everyone, nothing noticeable. If you're at a very high latitude, a faint aurora display is possible.
Do you need to do anything? No action is needed for most people. If you rely on precision GPS or amateur/HF radio, be aware that minor drift or interference is possible.
Who's most affected: Mainly aurora photographers and observers at very high latitudes. The general public is unlikely to be affected.
Set your location elsewhere on the site for a personalized aurora check.
Minimal everyday impact
Show official NOAA alert text
Space Weather Message Code: WARK05
Serial Number: 2272
Issue Time: 2026 Oct 30 2311 UTC
WARNING: Geomagnetic K-index of 5 expected
Valid From: 2026 Oct 30 2310 UTC
Valid To: 2026 Oct 31 0600 UTC
Warning Conditions: Onset
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.
InfoalertOct 30, 22:40 UTC
Kp 4 Geomagnetic Activity Alert
Elevated geomagnetic activity. Aurora possible in high-latitude regions. Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
What Does This Mean for You?
Geomagnetic activity is elevated (Kp 4) but below the G1 storm threshold (Kp 5), so this is not a geomagnetic storm. For most people going about everyday life, there is nothing to notice.
You might notice: For almost everyone, nothing noticeable. If you're at a very high latitude, a faint aurora display is possible.
Do you need to do anything? No action is needed for most people. If you rely on precision GPS or amateur/HF radio, be aware that minor drift or interference is possible.
Who's most affected: Mainly aurora photographers and observers at very high latitudes. The general public is unlikely to be affected.
Set your location elsewhere on the site for a personalized aurora check.
Minimal everyday impact
Show official NOAA alert text
Space Weather Message Code: ALTK04
Serial Number: 2695
Issue Time: 2026 Oct 30 2240 UTC
ALERT: Geomagnetic K-index of 4
Threshold Reached: 2026 Oct 30 2235 UTC
Synoptic Period: 2100-2400
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.
InfowarningOct 30, 22:24 UTC
Kp 4 Geomagnetic Activity Warning
Elevated geomagnetic activity. Aurora possible in high-latitude regions. Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
What Does This Mean for You?
Geomagnetic activity is elevated (Kp 4) but below the G1 storm threshold (Kp 5), so this is not a geomagnetic storm. For most people going about everyday life, there is nothing to notice.
You might notice: For almost everyone, nothing noticeable. If you're at a very high latitude, a faint aurora display is possible.
Do you need to do anything? No action is needed for most people. If you rely on precision GPS or amateur/HF radio, be aware that minor drift or interference is possible.
Who's most affected: Mainly aurora photographers and observers at very high latitudes. The general public is unlikely to be affected.
Set your location elsewhere on the site for a personalized aurora check.
Minimal everyday impact
Show official NOAA alert text
Space Weather Message Code: WARK04
Serial Number: 5444
Issue Time: 2026 Oct 30 2224 UTC
WARNING: Geomagnetic K-index of 4 expected
Valid From: 2026 Oct 30 2223 UTC
Valid To: 2026 Oct 31 1200 UTC
Warning Conditions: Onset
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.
InfoalertOct 30, 14:59 UTC
Electron Flux Enhancement Alert
Energetic electron flux (above 2 MeV) measured by NOAA's GOES satellites has exceeded 1,000 pfu. This matters mainly to satellite operators, since these electrons can charge spacecraft electronics. It has no direct effect on people on the ground.
What Does This Mean for You?
This is an energetic-electron notice from satellites in geostationary orbit. It describes conditions at satellite altitudes, not a storm affecting people at the surface.
You might notice: Nothing directly -- it does not affect phones, power or the weather.
Do you need to do anything? No action is needed for the general public.
Who's most affected: Mainly satellite operators, since high electron flux can charge spacecraft electronics.
Minimal everyday impact
Show official NOAA alert text
Space Weather Message Code: ALTEF3
Serial Number: 3762
Issue Time: 2026 Oct 30 1459 UTC
CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1,000pfu
Continuation of Serial Number: 3761
Begin Time: 2026 Oct 23 1140 UTC
Yesterday Maximum 2MeV Flux: 1228 pfu
Max time: 2026 Oct 29 1630 UTC
G1watchOct 29, 19:10 UTC
G1 Geomagnetic Storm Watch
A minor geomagnetic storm. Aurora possible in far-northern states (Michigan, Maine). Little to no impact on power or radio. Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
What Does This Mean for You?
This is a minor geomagnetic storm (G1). For most people going about everyday life, there is little to notice. Effects are generally limited to weak power grid fluctuations and minor satellite operations impacts.
You might notice: For almost everyone, nothing noticeable. If you're at a very high latitude, a faint aurora display is possible.
Do you need to do anything? No action is needed for most people. If you rely on precision GPS or amateur/HF radio, be aware that minor drift or interference is possible.
Who's most affected: Mainly aurora photographers and observers at very high latitudes. The general public is unlikely to be affected.
Set your location elsewhere on the site for a personalized aurora check.
Minimal everyday impact
Show official NOAA alert text
Space Weather Message Code: WATA20
Serial Number: 1134
Issue Time: 2026 Oct 29 1910 UTC
WATCH: Geomagnetic Storm Category G1 Predicted
Highest Storm Level Predicted by Day:
Oct 30: None (Below G1) Oct 31: G1 (Minor) Nov 01: G1 (Minor)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
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 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.
Common questions
Is there a solar storm warning today?▾
Yes/no depends on live NOAA data — check the ticker at the top of this page. When NOAA issues a Geomagnetic Storm Warning (G1–G5), a Solar Radiation Storm Warning (S1–S5), or a Radio Blackout (R1–R5), you'll see it listed in the 'Active Now' section above with plain-English impacts.
Is there a geomagnetic storm warning today?▾
A geomagnetic storm warning means NOAA expects the Kp index to reach 5 or higher, disturbing Earth's magnetic field. Any active geomagnetic warning appears above with its G-scale rating. G1 is minor (aurora in far northern states), G5 is extreme (aurora near the equator, potential grid failures).
Is NASA issuing a solar storm warning today?▾
NASA does not issue space weather warnings — that's NOAA's Space Weather Prediction Center (SWPC), the official U.S. authority. NASA operates the satellites (SDO, SOHO, DSCOVR) that feed data to NOAA. This page pulls directly from NOAA SWPC and refreshes every 5 minutes.
Where can I see space weather live?▾
Right here — the alerts above update every 5 minutes from NOAA SWPC. For real-time solar wind, Kp index, X-ray flux, and CME tracking, use our live Dashboard. For the Sun's current appearance, see the SDO Satellite Images page.
Is there a solar storm warning today with a live map?▾
Aurora visibility during a storm is shown on the OVATION aurora oval map on our Aurora Forecast page. NOAA's own live map is embedded there as well. The higher the storm's G-level, the further south aurora becomes visible.
Is there a solar storm warning tomorrow?▾
NOAA publishes a 3-day space weather outlook. Any storm expected within the next 72 hours appears above as a 'Watch' (issued days ahead) rather than a 'Warning' (issued when the storm is imminent or in progress). Watches become warnings when confidence increases.
Where is the space weather dashboard?▾
Our live Space Weather Dashboard shows real-time Kp, IMF Bz, solar wind speed, X-ray flux, and proton flux — all pulled from NOAA SWPC. Combined with the alerts on this page, it's the complete picture of what the Sun and Earth's magnetic field are doing right now.
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