Earthquake
Shaking of earth caused by a sudden
movement of rock beneath its surface.
Hypo center
The calculated location of the focus
of an earthquake.
Epicenter
That point on the Earth's surface
directly above the hypo center of an earthquake.
Seismograph
An instrument that records the
motions of the Earth's surface. A seismic monitoring station was set up on the
hill top of the Coloane Island, with a set of Analog Seismograph at the
beginning and later with an additional set of Digital Seismograph. Whenever an
earthquake occurs, the seismic waves will be detected by the Seismograph,
process by the amplifier, and will be transmitted to the Center via wireless or
telephone lines.