geo·​mag·​net·​ic ˌjē-ō-mag-ˈne-tik How to pronounce geomagnetic (audio)
: of or relating to terrestrial magnetism
geomagnetically adverb
geomagnetism noun

Examples of geomagnetic in a Sentence

Recent Examples on the Web When the researchers compared 23 years’ worth of radar data from across the central U.S. with magnetic field measurements from the stations, the scientists found a noticeable decrease in the sheer number of birds migrating on nights with high geomagnetic activity. Meghan Bartels, Scientific American, 10 Oct. 2023 The geomagnetic activity is most visible when there is little cloud cover and no light pollution from artifical sources. Paul Best, Fox News, 23 Apr. 2023 In autumn, winter, and spring, the skies near the Earth’s geomagnetic poles come alive with nature’s greatest light show. Debbie Olsen, Travel + Leisure, 18 Sep. 2023 That field is centered over the geomagnetic North Pole, a spot which changes over time. oregonlive, 11 July 2023 The Geophysical Institute ranks global geomagnetic activity on the Kp Index, which ranges from zero to nine. Ashley Stimpson, Popular Mechanics, 12 July 2023 The intensity of geomagnetic activity is measured by the planetary K index. Will Sullivan, Smithsonian Magazine, 11 July 2023 The higher the geomagnetic activity, the brighter the aurora is. Emily Deletter, The Courier-Journal, 10 July 2023 The higher the geomagnetic activity, the brighter the aurora. Kate Perez, USA TODAY, 9 July 2023 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'geomagnetic.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1904, in the meaning defined above

Time Traveler
The first known use of geomagnetic was in 1904

Dictionary Entries Near geomagnetic

Cite this Entry

“Geomagnetic.” Dictionary, Merriam-Webster, Accessed 5 Dec. 2023.

Kids Definition


geo·​mag·​net·​ic ˌjē-ō-mag-ˈnet-ik How to pronounce geomagnetic (audio)
: of or relating to the magnetism of the earth
geomagnetism noun
Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!