C. 2. Translate the text Seismic activity and then discuss it with your partner

Date: 2015-10-07; view: 490.

E. 1. Insert as, since, because, therefore, until

1. ... my brother is a pilot, he hopes to travel in space. 2. It is difficult to understand you ... you speak very fast. 3. The exercise is easy, ... it won't take much time to do it. 4. We can't eat dinner at a restaurant ... it costs a lot of money. 5. There is no contrast in these buildings ... they are alike in size and material. 6. ... his father was a painter, he got a good training in art. 7. ... Igarka lies in the North its climate is very severe. 8. You are weak in Maths, ... you must work hard to pass the exam. 9. Wait here …I come. 10. It's very cold outside, ... you must shut the window. 11. … I live far from the University I get there by bus.

An earthquake is a tremor of the earth's surface usually triggered by the release of underground stress along fault lines. This release causes movement in masses of rock and resulting shock waves.

The seismic activity of an area refers to the frequency, type and size of earthquakes experienced over a period of time. Earthquakes are measured using observations from seismometers. At the Earth's surface, earthquakes manifest themselves by shaking and sometimes displacement of the ground. When the epicenter of a large earthquake is located offshore, the seabed may be displaced sufficiently to cause a tsunami. Earthquakes can also trigger landslides, and occasionally volcanic activity.

In its most general sense, the word earthquake is used to describe any seismic event — whether natural or caused by humans — that generates seismic waves. Earthquakes are caused mostly by rupture of geological faults, but also by other events such as volcanic activity, landslides, mine blasts, and nuclear tests. An earthquake's point of initial rupture is called its focus or hypocenter. The epicenter is the point at ground level directly above the hypocenter.