C1: Opportunities & Risks Flashcards
1
Q
Earthquake
A
sudden vibration / shaking of the ground surface or sea bed.
there is no fixed frequency to occur.
1
Q
Volcanic Eruptions
A
Hot materials are ejected or emitted from the fissures at the Earth Surface. This process can be found at volcanoes, large fissures on the ground surface / under the sea.
2
Q
Tsunamis
A
A series of huge sea waves spread to coastal areas.
Huge sea waves travel at high speed at about 700-800km/h.
It is difficult to be noticed in open areas, but the sea waves will become 20-30m in height when approaching to shallow sea coast.
