macroseism
noun
mac·ro·seism
ˈmakrōˌsīzəm sometimes -sez- or -sāz- or -sēz-
: a severe or major earthquake compare microseism
macroseismic adjective
¦makrō¦sī|zmik also |sm- sometimes -¦se| or -¦sā| or -¦sē|
Word History
Etymology
International Scientific Vocabulary macr- + -seism