geomagnetic

adjective

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
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If geomagnetic activity intensifies, auroras could extend beyond their usual polar regions into parts of the northern United States and southern Canada. Valerie Mesa, PEOPLE, 1 Apr. 2026 While the weekend's geomagnetic activity is beginning to wind down, the show may not be completely over yet. Daisy Dobrijevic, Space.com, 23 Mar. 2026 How to view the aurora borealis in Iowa During times of high geomagnetic activity, which pushes the northern lights further south, the aurora will be visible directly overhead in the northern United States, according to the prediction center. Lucia Cheng, Des Moines Register, 20 Mar. 2026 The northern lights are caused by geomagnetic activity, which occurs when charged particles from the sun collide with Earth’s magnetic field and atmosphere. Michele Laufik, Martha Stewart, 10 Mar. 2026 See All Example Sentences for geomagnetic

Word History

First Known Use

1904, in the meaning defined above

Time Traveler
The first known use of geomagnetic was in 1904

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Cite this Entry

“Geomagnetic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/geomagnetic. Accessed 5 Apr. 2026.

Kids Definition

geomagnetic

adjective
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
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