Geology · Volcanology
Harmonic tremor is a continuous oscillating ground motion occurring during a volcanic eruption, typically with a frequency range of:
- 10.01 – 0.1 Hz
- 20.5 – 10 Hz✓
- 320 – 100 Hz
- 4100 – 1000 Hz
Correct answer
0.5 – 10 Hz
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