The analogy "they are called harmonic tremors, perhaps because of their constant release of energy, like one long song played underground" suggests that harmonic tremors are a continuous and rhythmic phenomenon, similar to a song that plays steadily. Just as a song has a consistent melody or rhythm, harmonic tremors occur in a repeating pattern due to the ongoing process of magma pushing against rock and causing small earthquakes. The use of the word "harmonic" implies a sense of harmony and regularity in the release of energy, likening the behavior of these seismic events to a musical composition that unfolds over time beneath the earth's surface. This analogy helps illustrate the idea that while these tremors may be too small to feel individually, they collectively create a significant and rhythmic seismic activity associated with volcanic processes.
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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