Visual Aurora Borealis/Northern Lights and VHF Radio Aurora Indicators Last Updated: 12:00 UTC 

Geomagnetic Storm

 2.67 Kp - Index 12 ap index

Quiet No Geomagnetic Storm

Kp - Planetary Index

No Aurora

Radio Aurora Indicators

Est. daily  15  A - Index

Quiet No Geomagnetic Storm

Not Active

No Radio Aurora

Kp - Index information

The higher the Kp - Index (0-9) the greater the chance of seeing the Aurora Borealis. The three-hourly K index data is collected from ground-based magnetometers at 13 mid-latitude observatories. The scale is non-linear.
The ap index (0-400) is the equivalent three-hourly range or amplitude on a linear scale.

A - Index information

This A - Index estimate is the rolling average of the last eight ap indices: the true Ap index is the same average for the UT day. High Kp, ap & Ap indices (caused by strong solar activity) may indicate enhanced VHF radio communication (28-433 MHz) at a range of 1000 miles or more in mid- to high latitudes: the radio-aurora.

Data Provided by https://services.swpc.noaa.gov  ©2025