3-day Estimated Planetary K-index graph

The Estimated 3-hour Planetary Kp-index is derived at the NOAA Space Weather Prediction Center using data from the following ground-based magnetometers: Boulder, Colorado; Chambon la Foret, France; Fredericksburg, Virginia; Fresno, California; Hartland, UK; Newport, Washington; Sitka, Alaska. These data are made available thanks to the cooperative efforts between SWPC and data providers around the world, which currently includes the U.S. Geological Survey, the British Geological Survey, and the Institut de Physique du Globe de Paris.

Development and negotiations are in progress to add Jeju, Korea (Korea Communications Commission); Canberra, Australia (Geoscience Australia); Ottawa and Meanook, Canada (Geological Survey of Canada).

Other SWPC Real-time Monitors

Kp-indices of 5 or greater indicate storm-level geomagnetic activity. Geomagnetic storms have been associated with satellite surface charging and increased atmospheric drag.

For more information see The K-index or SWPC Education page.

This page updates dynamically every 5 minutes.

NOAA / Space Weather Prediction Center