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K-index values

K-index values indicating degrees of geomagnetic disturbance are determined from observed three-hourly geomagnetic variations. Previous values can be searched for below. The registered datasets are updated every month. Dates and times are based on Coordinated Universal Time.

Terminology

Select the observatory/period below and click Search.

K Index Form
Description	Selection
Observatory	Kakioka Memambetsu Kanoya
Display mode	Calendar Solar cycle
Display format	Daily sum Every 3 hours
Display period	to Bartels Solar Rot. -

* Searches for longer periods may take longer.

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