geomagnetic

adjective

geo·​mag·​net·​ic ˌjē-ō-mag-ˈne-tik 

: of or relating to terrestrial magnetism

geomagnetically

ˌjē-ō-mag-ˈne-ti-k(ə-)lē 

adverb

geomagnetism

ˌjē-ō-ˈmag-nə-ˌti-zəm 

noun

Examples of geomagnetic in a Sentence

Recent Examples on the Web

Topline More than a dozen states in the northern U.S. might have an opportunity to see the northern lights Thursday, as a recent coronal mass ejection is expected to disrupt Earth’s geomagnetic field, according to the National Oceanic and Atmospheric Administration. —Ty Roush, Forbes.com, 7 Aug. 2025

Keep up with northern lights forecasts and geomagnetic activity warnings with our aurora forecast live blog. —Daisy Dobrijevic, Space.com, 4 Aug. 2025

Parts of nearly a dozen states along the northern tier of the U.S. have a low chance of seeing aurora borealis due to minor geomagnetic activity, according to the National Oceanic and Atmospheric Administration's Space Weather Prediction Center. —Melina Khan, USA Today, 23 July 2025

Both nights have a three on the Kp index, which measures geomagnetic activity and aurora intensity on a scale that ranges from zero to nine. —Skyler Caruso, People.com, 16 July 2025

Word History

First Known Use

1904, in the meaning defined above

Phrases Containing geomagnetic

• geomagnetic storm

Rhymes for geomagnetic

• alphabetic
• anaesthetic
• anesthetic
• antithetic
• apathetic
• arithmetic
• cybernetic
• diabetic
• dietetic
• diuretic
• empathetic
• energetic

Kids Definition

geomagnetic

adjective

geo·​mag·​net·​ic ˌjē-ō-mag-ˈnet-ik 

: of or relating to the magnetism of the earth

geomagnetism

-ˈmag-nə-ˌtiz-əm 

noun