EARTH SCIENCE
SEISMOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The strong ocean currents are undermining both areas causing earthquakes.
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Both areas are located near the edge of the Pacific Ocean, the unstable sand causes earthquakes.
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Both areas are subjected to strong ocean wind and waves that causes earthquakes.
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Both areas are on the boundary of active plates, the motion of the plates causes earthquakes.
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Detailed explanation-1: -Explanation: When two or more continental/oceanic tectonic plates slide over each other, earthquakes are caused. Areas like Japan and California lie near the intersections of these tectonic plates and therefore are frequently hit by earthquakes.
Detailed explanation-2: -Along the Ring of Fire girding the Pacific Ocean, for example, the seafloor plunges beneath Asia and the Americas, building mountains, feeding volcanoes, and triggering earthquakes. Most earthquakes arise along such fault zones.
Detailed explanation-3: -Since the formation of the San Andreas Fault system 25-30 million years ago, the juxtaposition of the Pacific and North American plates has formed many faults in California that accommodate lateral motion between the plates.
Detailed explanation-4: -Bands of earthquakes mark tectonic plates. Narrow bands with shallow earthquakes (marked in red) indicate transform boundaries or mid-ocean ridge divergent boundaries. Wider bands with earthquakes at a range of depths are subduction zones.
Detailed explanation-5: -About 80% of earthquakes occur where plates are pushed together, called convergent boundaries. Another form of convergent boundary is a collision where two continental plates meet head-on.