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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Seismic activity:

HEARTHQUAKE: Fireplace activity during seismic activity?
QUAKE: Seismic activity
EPICENTER: Focus of seismic activity
TREMOR: Seismic activity
TREMORS: Some seismic activity
FAULT: Site of some seismic activity