mi·​cro·​seism ˈmī-krə-ˌsī-zəm How to pronounce microseism (audio)
: a feeble rhythmically and persistently recurring earth tremor
microseismic adjective
microseismicity noun

Examples of microseism in a Sentence

Recent Examples on the Web And, indeed, there is at least one other place on Earth where a volcano does cause a microseism with some similarities to this one. Anna Funk, Discover Magazine, 27 Oct. 2020 And there’s a similar volcanic microseism that’s already well documented in Japan. Caroline Delbert, Popular Mechanics, 21 Feb. 2022

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

Word History


International Scientific Vocabulary micr- + Greek seismos earthquake — more at seismic

First Known Use

1887, in the meaning defined above

Time Traveler
The first known use of microseism was in 1887

Dictionary Entries Near microseism

Cite this Entry

“Microseism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/microseism. Accessed 26 Feb. 2024.

More from Merriam-Webster on microseism

Love words? Need even more definitions?

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