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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
When will the northern lights be visible? After a spike in geomagnetic activity, the northern lights will light up the heavens for a second time this week between Thursday, May 29, and Saturday, May 31. Valerie Mesa, People.com, 29 May 2025 The Northern Lights may be visible overhead and/or in northern skies from 10 U.S. states on Thursday, May 29 through Saturday, May 31, 2025, after a spike in geomagnetic activity. Jamie Carter, Forbes.com, 29 May 2025 The most recent geomagnetic excursion is called the Laschamps excursion and occurred about 41 to 42,000 years ago, when the magnetic North Pole began to shift over Europe. Laura Baisas, Popular Science, 16 Apr. 2025 The current forecast suggests this CME will cause the strongest geomagnetic storming late Sunday morning and into the afternoon — a less-than-ideal time for those hoping to see the northern lights. Addy Bink, The Hill, 23 Mar. 2025 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 Jun. 2025.

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
Last Updated: - Updated example sentences
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