microseismicityn.
/ˌmʌɪkrə(ʊ)sʌɪzˈmɪsᵻti/, U.S. /ˈˌmaɪkrəsaɪzˈmɪsədi/ Geology.
Microseismic activity.
ΚΠ
1966 Bull. Seismol. Soc. Amer. 56 900 With only a single verticle-component [sic] seismograph, it is possible to map microseismicity on the scale of a few tens of kilometers or less.
1973 Philos. Trans. (Royal Soc.) A. 274 245 These sites..are part of an extensive network measuring strain and microseismicity.
1989 Nature 24 Aug. 626/2 This is supported by the microseismicity at ridge-transform intersections.
1993 Science 1 Jan. 29/2 An immediate surge in microseismicity culminated in a magnitude 5.6 quake 22 hours later.
This is a new entry (OED Third Edition, December 2001; most recently modified version published online March 2022).
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n.1966