# K-index

> measure of disturbances in the horizontal component of earth's magnetic field as an integer in the range 0–9

**Wikidata**: [Q1306457](https://www.wikidata.org/wiki/Q1306457)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/K-index)  
**Source**: https://4ort.xyz/entity/k-index


## References

1. Freebase Data Dumps. 2013