Chaser Story
From Austin to the Arctic
“Words cannot describe the experience. I was a proud husband who was able to check an item off my wife's bucket list.”
Live
Current KP Index
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Solar Wind
Speed of charged particles streaming from the Sun. Higher speeds (500+ km/s) compress Earth's magnetosphere and boost aurora activity.
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Bz Factor
The north-south component of the interplanetary magnetic field. Negative Bz (southward) is key — it reconnects with Earth's field and lets auroras happen.
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Density
Number of protons per cubic centimetre in the solar wind. Higher density means more particles hitting the magnetosphere, enhancing aurora brightness.
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Bt Total Field
Total strength of the interplanetary magnetic field in nanotesla. Higher Bt amplifies the effect of a southward Bz — stronger field, stronger potential aurora.
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total field strength
Popular:
3-Day Outlook
Aurora Forecast
--KP Index
--KP Index
--KP Index
Source: NOAA Space Weather Prediction Center · Updated every 5 min
48-Hour KP History
3-hourly readings · GFZ Potsdam
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Chaser Stories
From the field
Chaser Story
He Drove 15,000 Kilometers for This
“When the aurora appeared, the exhaustion and long distances instantly felt worth it. It was as if nature rewarded my patience.”
Chaser Story
The 24-Hour Aurora Chase
“Seeing the Northern Lights was an unforgettable experience. I was really happy — it was the perfect moment.”
Reference
Understanding the KP Scale
KP Activity Index (0–9)Current: —
0No Activity
1Quiet
2Low
3Moderate
4Good
5Very Good
6Strong
7Extreme
8Exceptional
9Rare