macroseism
/ˈmakrə(ʊ)ˌsʌɪzm/Geology. Now rare
noun
An earthquake, as opposed to an imperceptible earth tremor. Formerly also (in Milne's use): †a major earthquake that involved the ‘nucleus’ of the earth as well as its crust (obsolete ).
Origin
Early 20th century; earliest use found in James Milne (b. 1865). From macro- + seism, partly after French macroséisme.