...Seattle? The rocks are folded. Why may the next earthquake on the Seattle Fault cause "stunning levels of death and destruction"? 15. Imagine two buildings of similar construction: a green building with a foundation built on hard bedrock and a blue building with a foundation built on soft sandy deposits. Of the three major flavors of earthquake waves (P, S and surface), which one can travel through the interior of the Earth and propagate through liquid, solid and gas? 6. The primary cause of human death and injury during an earthquake is building collapse. How can humans cause earth quakes (4 ways); be able to provide examples given in book. When an earthquake occurs on one of these faults, the rock on one side of the fault slips with respect to the other. 27. 4. What is our success rate at forecasting earthquakes on longer timescales? An earthquake on the Seattle Fault poses the greatest risk to Seattle because: The Seattle Fault Zone extends east-west through the middle of the city. How do we know that Earth has a core, given that we cannot drill a hole that deep? Is there a significant chance of an earthquake occurring in the next 500 years that would cause major damage in Los Angeles? Name two major earthquakes on the western side of the Wasatch Mts. Earthquakes are caused by energy released from tectonic plates shifting beneath the earth's surface, while volcanoes are mountains that trap gas and vapor underground until intense pressure forces an eruption. Chapter 8 Earthquakes SECTION 1 WHAT ARE EARTHQUAKES? Most, if not all, shallow-focus earthquakes in the crust are caused by frictional sliding along faults. 3. Scheduled maintenance: Saturday, October 10 from 4–5 PM PT 33. charged for the felony of manslaughter for reassuring the public. What causes thrust faults; what is a blind trust fault? The plate boundaries should be drawn along the areas with large numbers of earthquakes. P waves are the fastest seismic waves, and so arrive at a distant seismograph first. Magma causes rock to liquify and rocks volume expands neighboring brittle rock fractures to make room. Start studying What causes earthquakes. What has created the Basin and Range province; what kind of faults occur here? Earthquakes are caused by the sudden release of energy within some limited region of the rocks of the Earth. How does elastic rebound theory explain the behavior of faults and the energy released during an earthquake? The petroleum industry has known for some time hat human activity can produce earthquakes, particularly whe ____. Earthquake experts say current building codes don’t reflect the Seattle area’s riskiest features — but the outlook could improve if the Really Big One can wait. When an earthquake shakes loosely-packed (unconsolidated) fine/medium-grained sandy material that is saturated with water, the grains tend to reorganize into a more tightly packed mass and the excess water is pushed upward. 11. Give 3 reasons why Salt Lake City, Provo, and Ogden are in particular danger of a large earthquake. The Cascadia Subduction Zone is a giant fault running from Cape Mendocino, Calif. past Oregon and Washington and doesn’t end until it’s north of Vancouver Island in Canada. Displacement (a change in the shape) of the ocean floor during an earthquake is one cause of a tsunami. Do all states in the U.S. have earthquakes? What does the time difference between the first arrival of P and S waves tell us about an earthquake? The deepest earthquakes ever recorded are as deep as ~700 km. ...New York? We know that the density of the mantle increases with depth because of the time it takes for a P wave to travel through the mantle from an earthquake to a distant seismograph. 80 bridges and 1000 unreinforced masonry buildings and 2m tsunami. 17. P waves can travel through the interior of Earth, through liquid, solid and gas. Earthquakes I. Earthquakes are vibrations of the Earth produced by the release of energy during a sudden rupture of the Earth. "The absolute answer is 'yes,' fracking does cause earthquakes. When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the … 30. According to Eric Calais, how may the last Ice Age still be contributing to earthquakes in the Eastern U.S.? What causes earthquakes? We know that Earth has a core because of the way seismic waves are reflected and refracted off of the core-mantle boundary. 26. What does the amplitude of the seismic signal recorded by a seismograph tell us about an earthquake, once the distance to the epicenter is known? What is the name of the major plate-boundary fault in California? 9. That's more than 12,000 earthquakes in 30 years! Corrisponds to the St. Gervieve fault zone; there was a meteorite impact 350 mil. Multiple Choice Questions for Earthquakes - Chapter 16 Each chapter will include a few questions designed to test your knowledge of material covered in the chapter and in the Internet-based resources. 13. Seattle Tacoma Area, Washington has had: (M1.5 or greater) 0 earthquakes in the past 24 hours 2 earthquakes in the past 7 days; 12 earthquakes in the past 30 days Fallen bricks cover parked cars in Seattle’s Pioneer Square district after the 2001 Nisqually Earthquake. 16. Now let’s visit the 3 most dangerous earthquake faults for Seattle one by one: 1. on the Earth's surface directly above the place in Earth's interior where the earthquake was generated (known as the hypocenter or focus of the earthquake). Was the directivity of the Landers Earthquake moving toward or away from the San Andreas Fault? On September 19, a magnitude 7.1 earthquake rocked central Mexico, with fatalities estimated in the hundreds—the largest, most serious earthquake of at … Volcanic earthquakes are triggered by changes in the magmatic system within and beneath the volcano. What unique events accompanied the New Madrid earthquakes? Why is the St. Lawrence River Valley subject to earthquakes; why is the most active zone near Charlesvois? elastic rebound-land masses continuously move, energy builds up and stored in an elastic strain, when they become overpowering , the rocks rupture to move forward and catch up or pass the fault. Particle motion in a P wave is parallel to the direction in which the wave propagates, because a P wave is a compressional wave. When magma is injected or removed from the system, surrounding rock will either shift to make room for the injected magma, or fill in a vacated area. Access the answers to hundreds of Earthquakes questions that are explained in a way that's easy for you to understand. Surface waves cause most of the damage during an earthquake. This earthquake caused parts of Restoration Point near on Bainbridge Island to be lifted 35 feet straight up. 21. Is California's major plate-boundary fault the only fault capable of producing large earthquakes in southern California? The San Andreas fault is not the only fault capable of producing large earthquakes in southern California. 2. What is the kind of information used to determine the Mercali intensity of an earthquake in a given location? How do we know that Earth has a liquid outer core? Looking at the state-by-state report of earthquakes over magnitude 3.5 from the USGS, Alaska amounts to 57 percent of all earthquakes in the United States. The amplitude of the seismic signal recorded by a seismograph gives us information about the magnitude of the earthquake, once the distance to the epicenter is known. The main cause of the earthquake is volcanic eruptions. If we define the energy difference between a Richter-style magnitude 1 earthquake and a magnitude 2 earthquake as equal to 30 screaming cheerleaders, the energy difference between a magnitude 5 earthquake and a magnitude 8 earthquake is 30x30x30 screaming cheerleaders. If you have two chunks of the mantle, both of which are the same composition and are under the same pressure (because they are at the same depth) but chunk A is hotter than chunk B, how will their densities compare with one another? The fault surface can be vertical, horizontal, or at some angle to the surface of the earth. Name one major earthquake on the eastern side of the Sierra Nevada Mts. Ice on soft lake sediments, live on sharply defined faults (wastach) scorps havent had one since 1847. What event 480 million years ago laid the foundation for the 2011 Virginia Earthquake? Rayleigh waves can move through the surface of both earth and water. 1. There is a significant chance of a damaging earthquake during the next 500 years near Los Angeles, Seattle, Memphis and Salt Lake City.There is little significant chance of a damaging earthquake during the next 500 years near Chicago, New York, Dallas or Waco. 3. Over how large an area was the New Madrid earthquakes felt; why? Thinking about a map of the Earth and its plates, where do most earthquakes occur? Its causesed by sudden moveement of earths plates. The time difference between the first arrival of P and S waves at a given seismograph tells us the distance (but not the direction) from that seismograph to the epicenter.