An earthquake; earthquake activity.

An earthquake; the occurrence of earthquakes, earthquake activity. Also figurative.

An earthquake.

A shaking or movement of the ground; esp. a violent convulsion of the earth's surface, frequently causing great destruction, and resulting from…

= earthquake, n.

An earthquake. Obsolete.

Earthquake activity; an earthquake or earth tremor.

An earthquake.

A tremulous or vibratory movement caused by some external impulse; a vibration, shaking, quivering. earth-tremor, an earthquake.

a tremor felt in the air, spec. a sonic boom; cf. earthquake, n.

(originally) an earthquake; (in later use) an earth tremor; a seismic wave.

An earthquake.

The action of quaking; an instance of this. In later use: spec. an earthquake. Also as the second element in compounds, as church-quake, ice-quake…

An earthquake.

An earthquake, as opposed to an imperceptible earth tremor (cf. microseism, n.). Formerly also (in Milne's use): †a major earthquake that involved…

An earthquake or earth tremor.