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 FEEDBACK The Pwave shadow zone, shown in gray, occurs because Pwaves are refracted or bent at the coremantle boundary FEEDBACK When shallow, intermediate, and deep earthquakes are all present, the tectonic setting is a convergent plate boundary The plate movement results in earthquakes at all three depths as the plate on the east sideA shadow zone occurs on the opposite side of the earth from an earthquake because of the liquid outer core SWaves are stopped all together while the PWaves are refracted (bent) to create a zone where no waves are picked up at all This zone is between 102° and 143°around the earth from the earthquakeThe area beyond 105 degrees of distance forms a shadow zone At larger distances, some P waves that travel through the liquid core would arrive, but still no S waves READ Hawaii 1946 Sugar Strike The Earth has to have a molten, fluid core to explain the lack of S waves in the shadow zone, and the bending of P waves to form their shadow zone

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The s-wave shadow zone occurs because

The s-wave shadow zone occurs because-A seismic shadow zone is an area of the Earth 's surface where seismographs cannot detect direct P and/or Swaves from an earthquake When an earthquake occurs, seismic waves radiate out spherically from the earthquake's focus The primary seismic waves are refracted by the liquid outer core of the Earth and are not detected between 104° and 140° (between approximately 11,570Answer (1 of 2) Shadowzones are produced on the other sides of the planet due to waves being refracted or blocked by the liquid outer core of Earth When earthquakes occur, they produce primary and secondary waves (called compression and shear waves sometimes) Pwaves can travel through liquid

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An earthquake occurs at 12pm A seismic station records the first Swave at 1219pm Which set of data shows the approximate arrival time of the first Pwave and the distance to the epicenter?Pwaves or Swaves are received in the shadow zone because (1) 10 In the United States, most of the major damage expected from a future earthquake is predicted to occur near a (1) divergent plate boundary, only (2) convergent plate boundary, only Swaves were not generated at the epicenter (3) Station AShadow zone 1 A region of the subsurface from which seismic reflections cannot be detected because their raypaths do not emerge to the surface 2 A zone over the Earth's surface in which Pwaves and/or Swaves generated by an earthquake are detected only weakly, or are absent, because of refraction within the various layers deep within the Earth, and especially in

The Swave shadow zone (where the waves are not felt at the surface of Earth) occurs at an angular distance greater than about 1040 from the location of an Swaves do not travel through liquids (they are attenuated) The entire zone beyond 103° does not receive Swaves, and hence this zone is identified as the shadow zone of Swaves This observation led to the discovery of the liquid outer core The shadow zone of Pwaves appears as a band around the earth between 103° and 142° away from the epicentre The S wave shadow zone is caused by the outer core not transmitting S waves It crosses an arc of 105 degrees on the Earth (see the diagram on the left) Estimate the radius of the outer core The radius of the entire Earth is 6370 km

This creates a belt from 105 to 140 around the Earth called the P Wave Shadow Zone Although it is not illustrated think what would happen to an S wave that just entered the outer liquid core S waves can not travel through a liquid so from 105 to 105 degrees on either side of the epicenter no S waves are recorded This is the S Wave Shadow ZoneA zone where surface waves are not recorded A zone that does not receive direct body waves All of the above The following statement best summarizes the P wave shadow zone is Extends from 103° to 140° angular distance from the epicenter Occurs from 0°FaultItwasthe11TohokuearthquakeinJapanthatcausedmajordamagetoalocal from ESC 00 at University of South Florida This preview shows page 7 11 out of 15 pages

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The S wave shadow zone is caused by the outer core, which is liquid iron/nickelThe Pwave shadow zone is larger than the Swave shadow zone Seismic waves follow curved paths through the interior of the Earth P waves travel more slowly in the outer core than in the lower mantle Liquids do not transmit S waves The S wave shadow zone is caused by the _____ the crustmantle boundary the outer core the lower mantle the inner coreThe Swave shadow zone occurs because no Swaves reach the area on the opposite side of the Earth from the focus Since no direct Swaves arrive in this zone, it implies that no Swaves pass through the core This further implies the velocity of Swaves in the core is zero In liquids,

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 Best Answer Copy In simple terms the shadow zone of the Swave is larger because of the Earth's liquid outer core The Swave cannotThe presence of an Swave shadow zone 2 103° from the epicenter of any large earthquake tells us the A Outer Core is a solid B Outer Core is a liquid C Inner Core is a solid D Inner Core is a liquid 17 Crustal rebound occurs because A Isostatic balance requires equilibrium be maintained for crustal blocks "floating on mantle BTranscribed image text A M Earthquake occurs along the San Andreas Fault 70 miles from Bakersfield You observe the BC lab seismograph station (after the Covid19 scare and were back to Face face instruction), what would the SPinterval look like?

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S waves Surface waves are those waves that travel on the surface of the earth The destruction caused by earthquakes is primarily done by these waves S waves and P waves S waves also called secondary waves and shear waves, are the second waves to hit the seismographs They are transverse waves, which means that the motion is perpendicular toThe shadow zone is the area of the Earth from angular distances from 104 to 140 degrees from this earthquake, which does not accept direct Pwaves The shadow zone is the result of the fact that Swaves are completely stopped by the liquid core, and P The swave shadow zone was caused because when the swaves stops, it can not go through the liquid It can only goes through solids There is a part on the other side of the earth where there's not any swaves The pwave shadow zone is also caused because when the pwaves refract when the pwaves hits the liquid core

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No Pwaves or Swaves are received in the shadow zone because answer choicesA zone between 105° and 145° from the epicentre was recognized as the shadow zone for both the wave types The entire zone beyond 105° does not receive Swaves The shadow zone of Swave is larger than that of the Pwaves The shadow zone of Pwaves appears as a band around the earth between 105° and 145° away from the epicentreS wave a shadow zone appears when the velocity suddenly decreases degrees from the epicenter Describe the differences between P and S waves P waves expand and contract, can move through liquid solid and gas

The Earth

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The negligible Swave velocity in the outer core occurs because it is liquid, while in the solid inner core the Swave velocity is nonzero Primary and secondary wavesThe Swave shadow zone occurs because no Swaves reach the area on the opposite side of the Earth from the focus Since no direct Swaves arrive in this zone, it implies that no Swaves pass through the core This further implies the velocity of Swave in the core is 0 In liquids m = 0, so Swave velocity is also equal to 0The p wave shadow zone is caused by the refraction of the p waves as they travel through the earth from one medium to another P waves are known as See full answer below

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Seismic Shadow Zones S wave shadow zone The shadow zone results from S waves being stopped entirely by the liquid core Three different Swave phases show how the initial S wave is stopped (damped), or how it changes when encountering boundaries in the EarthThe Swave shadow zone occurs because no Swaves reach the area on the opposite side of the Earth from the focus Since no direct Swaves arrive in this zone, it implies that no Swaves pass through the core This further implies the velocity of Swave in the core is 0 In liquids μ = 0, so Swave velocity is also equal to 0 From this it is deduced that the core, or at least part of the coreIn general, the most destructive earthquake waves are the _____ P waves S waves Surface waves Q waves Where is the focus with respect to the epicenter directly below the epicenter directly above the epicenter in the P wave shadow zone in the S wave shadow zone Point A, where slip initiated during the earthquake, is called the _____ dip

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Shadow zone The shadow zone is the area of the earth from angular distances of 104 to 140 degrees from a given earthquake that does not receive any direct P waves The shadow zone results from S waves being stopped entirely by the liquid core and P waves being bent (refracted) by the liquid core View Shadow Zone animationThe S wave shadow zone is the area of the Earth's surface where S waves are not detected following an earthquake This shadow zone has led geologists to a model of the Earth with aSince the outer core is fluid, and Swaves cannot travel through a fluid, the "Swave shadow zone" is even larger, extending from about 100° to 180° Earth's Internal Structure We have already discussed the main elements in Earth's interior, the core, the mantle, and the crust

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Small SPinterval very large SPinterval There would be no Por S waves, because Bakersfield is in the shadow zone There  Measuring the arrival of seismic waves at stations around the world Swaves were not able to pass through outer core so it means that it is liquid "shadow zone" occurs because swaves did not reach the opposite side of the earth There is a solid core because pwaves are reflected off the boundary between inner and outer coreBecause of the refraction that takes place at the CMB, waves that travel through the core are bent away from the surface, and this creates a Pwave shadow zone on either side, from 103° to 150° This information can be used to discover the differences between the inner and outer parts of

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Gutenberg explained this Shadow Zone with a core which slowed and bent P waves Later, an S wave shadow zone was recognized, meaning no S waves were received at seismographs stations from 104o to 180o from an earthquake; Seismic shadowing occurs on the opposite side of the Earth from the earthquake epicenter because the liquid outer core refracts the longitudinal or compressional (Pwaves) while it absorbs the transverse or shear waves (Swaves) Outside of the seismic shadow zone both types of wave can be detected but, due to their different velocities and S waves dont even reach the shadow zone because they are unable to penetrate the outer core They are basically stopped by the shadow zone It depends on where the earthquake occurs

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Earthquakes Earth S Interior

Swaves can also be used but they are harder to generate artificially compared to Pwaves and require more complex receivers than ones designed to measure just Pwaves In marine surveys (unless sources and receivers are coupled directly to the ocean bottom) it is not possible to generate or measure Swaves at all Best answer The S wave shadow zone occurs because S waves do not pass through liquids and part of Earth's core is liquid The P wave shadow zone occurs because P waves slow down and get refracted when they pass through the part of Earth's core that is liquid Please log in or register to add a comment the mantle and core are composed of different material P waves refract as they travel through Earth The shadow zone exists because of seismic waves The shadows show when the earth spins around

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 Earth Sciences Earth Sciences questions and answers Correctly complete this sentence using the words providedSwaves travel curved paths and are prevented from reaching the core mantle boundarysome Swaves are refracted inward through the core before they reach this zonesome Swaves are refracted upward before they reach the core Swaves cannot travel

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