Aurora Alerts

NOAA space-weather alerts · not official

Setup

Step 1 — Install the app

Push only works from an installed icon, not this tab. Add to home screen or use your browser’s Install, then open Aurora from that icon and come back to this step.

iPhone: Share → Add to Home Screen · Android: ⋮ → Install · Computer: install icon in address bar

Active alerts
Aurora Alert
just now
Alert
ALTK04
Condition
Geomagnetic K-index of 4
K-index
4
Aurora visibility
Aurora may be visible at high latitudes such as Canada and Alaska.
Power grid
Weak power grid fluctuations can occur.
Aurora Alert
just now
Warning
WARK04
Condition
Geomagnetic K-index of 4 expected
K-index
4
Aurora visibility
Aurora may be visible at high latitudes such as Canada and Alaska.
Power grid
Weak power grid fluctuations can occur.
Aurora Alert
just now
Alert
ALTTP2
Condition
Type II Radio Emission
Aurora Alert
just now
Alert
ALTPX1
S1
Condition
Proton Event 10meV Integral Flux exceeded 10pfu
Aurora Alert
just now
Warning
WARPX1
S1
Condition
Proton 10MeV Integral Flux above 10pfu expected
Aurora Alert
just now
Continued Alert
ALTEF3
Past / non-active alerts
Aurora Alert
just now
SUMPX1
S1
Aurora Alert
just now
Summary
SUM10R
Condition
10cm Radio Burst
Geomagnetic Storm G1
just now
Watch
WATA20
G1
Condition
Geomagnetic Storm Category G1 Predicted
Aurora visibility
Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Power grid
Weak power grid fluctuations can occur.
Satellites
Minor impact on satellite operations possible.
Geomagnetic Storm G1
just now
Extended Warning
WARK05
G1
Condition
Persistence
K-index
5
Aurora visibility
Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Power grid
Weak power grid fluctuations can occur.
Satellites
Minor impact on satellite operations possible.
Geomagnetic Storm G1
just now
Alert
ALTK05
G1
Condition
Geomagnetic K-index of 5
K-index
5
Aurora visibility
Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.
Power grid
Weak power grid fluctuations can occur.
Satellites
Minor impact on satellite operations possible.
Aurora Alert
just now
Alert
ALTTP4
Condition
Type IV Radio Emission
Geomagnetic Storm G2
just now
Alert
ALTK06
G2
Condition
Geomagnetic K-index of 6
K-index
6
Best viewing area
as low as New York to Wisconsin to Washington state
Aurora visibility
Aurora may be seen as low as New York to Wisconsin to Washington state.
Power grid
Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Satellites
Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Geomagnetic Storm G2
just now
Warning
WARK06
G2
Condition
Geomagnetic K-index of 6 expected
K-index
6
Best viewing area
as low as New York to Wisconsin to Washington state
Aurora visibility
Aurora may be seen as low as New York to Wisconsin to Washington state.
Power grid
Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Satellites
Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Geomagnetic Storm G2
just now
Watch
WATA30
G2
Condition
Geomagnetic Storm Category G2 Predicted
Best viewing area
as low as New York to Wisconsin to Washington state
Aurora visibility
Aurora may be seen as low as New York to Wisconsin to Washington state.
Power grid
Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Satellites
Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Aurora Alert
just now
Summary
SUMXM5
R2
Condition
X-ray Event exceeded M5
Aurora Alert
just now
Alert
ALTXMF
R2
Condition
X-Ray Flux exceeded M5
Aurora Alert
just now
Summary
SUMX01
R3
Condition
X-ray Event exceeded X1
Geomagnetic Storm G3
just now
Alert
ALTK07
G3
Condition
Geomagnetic K-index of 7
K-index
7
Best viewing area
as low as Pennsylvania to Iowa to Oregon
Aurora visibility
Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Power grid
Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Satellites
Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Geomagnetic Storm G3
just now
Warning
WARK07
G3
Condition
Onset
K-index
7
Best viewing area
as low as Pennsylvania to Iowa to Oregon
Aurora visibility
Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Power grid
Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Satellites
Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.
Aurora Alert
just now
Summary
SUMSUD
Condition
Geomagnetic Sudden Impulse
Aurora Alert
just now
Warning
WARSUD
Condition
Geomagnetic Sudden Impulse expected
Geomagnetic Storm G3
just now
Watch
WATA50
G3
Condition
Geomagnetic Storm Category G3 Predicted
Best viewing area
as low as Pennsylvania to Iowa to Oregon
Aurora visibility
Aurora may be seen as low as Pennsylvania to Iowa to Oregon.
Power grid
Power system voltage irregularities possible, false alarms may be triggered on some protection devices.
Satellites
Systems may experience surface charging; increased drag on low Earth-orbit satellites and orientation problems may occur.