The analogy comparing harmonic tremors to "one long song played underground" suggests that the constant release of energy from these small earthquakes is rhythmic and continuous, similar to the way a song has a consistent melody. Just as a song flows with a series of notes, harmonic tremors occur in a repetitive and sustained manner, creating a pattern of energy release beneath the earth's surface. This emphasizes the idea that the tremors are not isolated events, but rather part of an ongoing process related to the movement of magma beneath a volcano.
Use the paragraph to answer the question.
You may not think earthquakes and volcanoes can go together, but they are unlikely friends, creating sensations under the earth's surface. Most earthquakes occur because of the movement of tectonic plates previously described. Sometimes earthquakes happen below a volcano. This happens because magma, which is hot molten rock beneath the earth's surface, pushes on rock until it breaks the rock and seeps into it. Then, the magma builds more pressure until it leaks more magma into the crack. Little earthquakes happen each time the rock breaks and lets in more magma. These little earthquakes are too small to feel. They are called harmonic tremors, perhaps because of their constant release of energy, like one long song played underground.
What does the analogy they are called harmonic tremors, perhaps because of their constant release of energy, like one long song played underground" from the paragraph mean?
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