Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2016 Dec 23;6:39769. doi: 10.1038/srep39769

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright © 2016, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

PMC Copyright notice

The graphs show the strength of the correlations after injecting an artificial signal in the data whereby some fraction of headache (left) and migraine (right) instances is due to geomagnetic activity. We model the response as either linear (a stronger response) or logarithmic (a weaker response). Regions above the dotted lines correspond to correlations that are statistically significant (P < 0.01). The intersect between the dotted and dashed lines shows that the data/method would have produced significant correlations even if only 1–2% of symptom instances were geomagnetic in origin. The actual correlation coefficients are consistent with 0% (arrows).