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harmonic tremor (Geography Dictionary)

harmonic tremor : One of a series of continuous rhythmic earthquakes in the Earth’s upper lithosphere that can be detected by seismographs. Harmonic tremors often precede or accompany volcanic eruptions.

_ ស្វែងរកឬបកប្រែពាក្យផ្សេងទៀតនៅប្រអប់នេះ៖
ឯកសារការងារនិងរៀនគ្រប់ប្រភេទ៖​
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