19) The epicenter of an earthquake is A) the direction toward the earthquake\'s
ID: 294190 • Letter: 1
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19) The epicenter of an earthquake is A) the direction toward the earthquake's center. B) the direction in which the wave front moves C) the point of initial movement. D) a point directly above the focus E) the shape of the wave front. 20) Seismologists now agree that most major earthquakes originate from A) large-scale landslides. B) volcanic activity C) subsurface magma. D) movement along faults E) convection in the outer core. 21) The most intense and widespeead zone of seismic activity occurs A) along convergent plate margins B) along coetinental rift zones. C) within the plates. D) along divergent plate margins E) along transform fault boundaries. 22) The distribution of earthquakes on Earth A) delincates plate boundaries. B) occurs parallel to all folded mountain belts. C) is at random throughout the interior of plates. D) delincates continental margins. E) is restricted to areas of fault zones in the shield. 23) Which of the following is NOT an accurate statement regarding the relationship of plate tectonics and earthquakes? A) The type of seismicity is governed by the type of plate boundary B) The motion of faults that create earthquakes along plate margins may be used to C)Most earthquakes occur in narrow beth tectomie plate boundaries. D) The crest of the oceanic ridge is characterized by deep focus carthquakes. E) Earthquakes at coavergent plate boundaries define a zone inclined downward beneath the continent or island arc. 24) A liquid outer core in the Earth is indicated by the fact that A) S waves will not travel through a liquid and do not travel through the outer core. B) surface waves cannot pass through the core. C) P waves do not travel through a liquid and do not travel through the core. D) all of the above E) both S and P waves will not travel through a liquid and do not travel through the coreExplanation / Answer
19) the point directly above the focus
the location of fracture is called focus and th point directly above focus is known as epicenter.
20)movement along faults
fault systems much more common than volcanic activity and they makes shallow earthquake which has more destructive power, like Nepal earthquake of magnitude 7.8 and occured 18.5Km below the ground
21)convergent plate boundaries
the convergent boundaries are always seismic active areas like pacific regions. subduction of denser plate in to mantle causes a region of earthquake called wadati benioff zone.
22)delineat plate boundaries.
most of the earthquakes occur along the plate boundaries due to their motion
23)the crest of the oceanic ridge is charecterised by deep focus earthquake
thee regions are charecterised by shallow earthquakes especially along the fracture zones.
24) S wave will not travel through a liquid and do not travel through outer core.
p wave can travel through both liquid and solid regions.
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