Physical Universe
16th Edition
ISBN: 9780077862619
Author: KRAUSKOPF, Konrad B. (konrad Bates), Beiser, Arthur
Publisher: Mcgraw-hill Education,
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Textbook Question
Chapter 15, Problem 34E
An earthquake occurs far from an observing station and produces P, S, and surface waves. Do all the waves arrive at the same time? If not, which arrives first and which last?
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Chapter 15 Solutions
Physical Universe
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(b) What rock...Ch. 15 - Distinguish between the foliation of a metamorphic...Ch. 15 - Distinguish between quartz and quartzite.Ch. 15 - How could you distinguish (a) chert from obsidian;...Ch. 15 - How could you distinguish (a) granite from gabbro;...Ch. 15 - Name the following rocks: (a) a rock consisting of...Ch. 15 - Name the following rocks: (a) a fine-grained,...Ch. 15 - Prob. 28ECh. 15 - Each step on the Richter scale of earthquake...Ch. 15 - What can be said about an earthquake whose...Ch. 15 - Why is the mantle thought to be solid?Ch. 15 - (a) Distinguish between earthquake P and S waves....Ch. 15 - In what part of the earth does the rock motion...Ch. 15 - An earthquake occurs far from an observing station...Ch. 15 - How does the radius of the earths core compare...Ch. 15 - Where is the earths crust thinnest? Where is it...Ch. 15 - What evidence is there in favor of the idea that...Ch. 15 - What is the source of the energy that powers most...Ch. 15 - (a) Why is it believed that the earths outer core...Ch. 15 - Why does a compass needle in most places not point...Ch. 15 - Why is it unlikely that the earths magnetic field...Ch. 15 - Prob. 42ECh. 15 - Why are igneous and metamorphic rocks in general...Ch. 15 - Both marble and slate are metamorphic rocks. Would...Ch. 15 - In what way is the weathering of rock important to...Ch. 15 - Prob. 46ECh. 15 - Is there a limit to the depth to which streams can...Ch. 15 - Why are streams and rivers so effective as agents...Ch. 15 - Under what circumstances does a glacier form?Ch. 15 - Which is the more important agent of erosion...Ch. 15 - Prob. 51ECh. 15 - How is it possible for glaciers to wear down rocks...Ch. 15 - What is a water table? 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- Assume P waves travel at 10 km/s and S waves travel at 5 km/s. If the S waves from an earthquake arrive at a seismographic station 10 minutes after the P waves, how far away was the earthquake from the station’arrow_forwardThe intensity of a wave of an earthquake is measured as 9 J/m². At a different point 8.6 km away from the first point the intensity is reduced by 20%. At what distance from the centre of the earthquake is the first intensity measured. Please give your result in km with 1 decimal. (The centre of the earthquake, the first point and the second point should all be in one straight line).arrow_forwardA seismic station located 60 km from the epicenter of an earthquake, recorded the maximum height of the S-waves to be 50 mm. What was the Richter magnitude of this earthquake?arrow_forward
- If the time interval between the arrival of P and S is 10 seconds, how far away did the earthquake originate? Assume an average velocity of P of 6km/s and for S of 4km/s.arrow_forwardCalculate the surface wave magnitude MS for an earthquake with IMM of VII, in an area that can be approximated by a circle with radius 20 km for a site at the borders of the given isoseismal. This site is located in the western United States. Compare the ensuing value with the estimations from relationships with other magnitude scales. Calculate the fault surface displacements. Assume that the earthquake mechanism is normal faulting.arrow_forwardWhat is the ratio of the intensities of an earthquake P-wave passing through the Earth and detected at two points 20 km and 60 km from the source? What is the ratio of the amplitudes?arrow_forward
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- On August 17, 1983, an earthquake with a magnitude of 5.3 in the Richter scale hit the province of llocos Norte. This was the most sever earthquake in North-western Luzon in 52 years and probably the second largest earthquake to hit Laoag City and its immediate vicinity in historical times (Source: philvocs.dost.gov.ph). How much energy was released by the earthquake? 8.51 x 107 joules 2.24 x 1012 joules 2.42 x 1012 joules 8.15 x 10' joulesarrow_forwardFollowing an earthquake, how long would it take a P-wave moving in a straight line with a speed of 5 km s-1 to reach the Earth’s opposite side?arrow_forwardThe magnitude M of an earthquake is given. a. Find the earthquake intensity I in terms of the zero-level earthquake intensity lo- b. Find the energy released by the earthquake. M = 7.3arrow_forward
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