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：2025/11/23
harmonic tremor
（ plural ）
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(geology) A rhythmic shaking of the ground detectable by a seismograph, and associated with volcanic activity. Often a symptomatic warning of an eruption.
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harmonic tremor
Scientists monitored a rising harmonic tremor beneath the volcano, signaling that an eruption could be imminent.
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Scientists monitored a rising harmonic tremor beneath the volcano, signaling that an eruption could be imminent.
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