![]() What does the term "in phase" refer to? Waves in phase have identical wavelengths and are aligned peak-to-peak and trough-to-trough When will perfect constructive interference occur for waves that are in phase and moving at the same velocity? When waves with identical wavelengths interfere. What results when two waves, in phase and with the same wavelength, interact? A wave with an amplitude that is the sum of the amplitudes of the initial two waves. What is an interference pattern? The wave pattern produced when two or more waves interact. Which of these statements is true? All of the locations except 9 could produce tsunamis, because all are subduction zones involving at least one oceanic plate. ![]() Bear in mind that all the earthquake locations that are not inland are on a convergent plate boundary (subduction zone). Which of the following best describes how scientists help the public prepare for an earthquake event? Scientists cannot predict when exactly an earthquake will occur, but they can identify tectonically active areas that are likely to produce earthquake activity and let the public know they are in an earthquake-prone area. Tsunami have a very long wavelength, so they travel at very high speeds (equivalent to the speed of a jet airplane). ![]() Tsunami are undetectable by ships in the open ocean Tsunami are undetectable by ships in the open ocean The tsunami warning system uses seismic waves and deep-ocean pressure sensors to detect tsunami. The tsunami warning system uses seismic waves and deep-ocean pressure sensors to detect tsunami.Īt the coast, a tsunami looks like a suddenly occurring high or low tide, which is why they are misnamed "tidal waves." If you are at a beach and the water suddenly drains out away from shore, it is safe to go explore the newly exposed land. Tsunami always express themselves at the coast as a single rapid surge of water towards the shore. it is not available on demand, and there currently is no viable way to store the energy Of the following statements about tsunami, which is/are true? A disadvantage shared by wave, solar and wind energy is that _. What might be a possible explanation for the fact that the there are no volcanoes over areas where the subducted plate is less than 100 kilometer deep? Magma is not generated in significant amounts until the subducted plate has reached a depth of 100 Volcanic Arc Creation. There are no volcanoes over plate that is less than 100 kilometer deep. The volcanoes appear to line up along the 100-kilometer dashed depth isoline, and there are more over areas where the plate is deeper. Describe the relationship between the location of volcanoes on the island of Japan and the depth to the subducted plate below Japan. What is the magnitude of the maximum slip indicated here, in meters? 24 According to this chart, in what general direction did slip occur? The motion was both upward and toward the east. ![]() The effective height of the tsunami would have been increased by the amount of subsidence of the coastline: here, around 1 meter. In light of your answers to Parts A through B, explain how the earthquake changed the coastline in a way that increased the destructiveness of the tsunami as it came ashore. In light of your answer to Part A, what is the explanation for the generation of the tsunami? The sudden lifting of the seafloor around the bulging crust pushed huge volumes of water up, out, and away in all directions. The Tohoku earthquake generated a massive tsunami that devastated the nearby coast of Japan. ![]()
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