Answer: seismic

AnswerCrossword Clue
SEISMIC

Subject to earthquakes

SEISMIC

Huge and abrupt

SEISMIC

Enormous in proportion

SEISMIC
Having a momentous impact
SEISMIC
Quakelike
SEISMICLike earthquakes
SEISMICRelated to earthquakes
SEISMICRelated to rumbling
SEISMICEarth-shattering, maybe
SEISMICKind of wave
SEISMICEarthshaking?
SEISMICLike fault-line activity
SEISMICQuaking?
SEISMICPertaining to earthquakes.
SEISMICSubject to earthquake.
SEISMICEarthquake-related
SEISMICCaused by an earthquake
SEISMICCaused by bad vibrations?
SEISMICEarth-shaking
SEISMICPertaining to earthquakes
SEISMICPertaining to bad vibrations?
SEISMICPertaining to quakes
SEISMICLike many tsunamis
SEISMICGroundbreaking?