ACROSS

1. An instrument for automatically detecting and recording the intensity, direction, and duration of a movement of the ground, especially of an earthquake.
2. The amount or degree of strength per unit area or volume.
3. A narrow inlet of the sea between cliffs or steep slopes.
4. A fracture in the continuity of a rock formation caused by a shifting or dislodging of the earth's crust, in which adjacent surfaces are displaced relative to one another and parallel to the plane of fracture.
5. A large wave or billow.
6. A sudden movement of the earth's crust caused by the release of stress accumulated along geologic faults or by volcanic activity.
7. A very large ocean wave caused by an underwater earthquake or volcanic eruption.
8. An overflowing of water onto land that is normally dry.

DOWN

1. A measure of the amount of energy released by an earthquake.
2. A quake of lesser magnitude, usually one of a series, following a large earthquake in the same area.
3. An intimation, threat, or sign of impending danger or evil.
4. The lowest point between waves.
5. An occurrence causing widespread destruction and distress; a catastrophe.
6. the point on the Earth's surface directly above the focus of an earthquake.