|
aftershock
|
A
quake of lesser magnitude, usually one of a series, following a
large earthquake in the same area. |
| seismograph
|
An
instrument for automatically detecting and recording the intensity,
direction, and duration of a movement of the ground, especially
of an earthquake. |
| intensity |
The
amount or degree of strength per unit area or volume. |
| magnitude
|
A measure of the amount of energy released by an earthquake.
|
| fault
|
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.
|
| trough
|
The
lowest point between waves. |
| surge |
A large wave or billow. |
| fjord
|
A
narrow inlet of the sea between cliffs or steep slopes. |
| crest |
The
top of a wave. |
| warning
|
An
intimation, threat, or sign of impending danger or evil. |
| disaster
|
An
occurrence causing widespread destruction and distress; a catastrophe.
|
| earthquake |
A
sudden movement of the earth's crust caused by the release of stress
accumulated along geologic faults or by volcanic activity. |
| tsunami |
A
very large ocean wave caused by an underwater earthquake or volcanic
eruption. |
| flooding |
An
overflowing of water onto land that is normally dry. |
| epicenter |
The
point on the Earth's surface directly above the focus of an earthquake. |
