Which of the Following Is True Regarding Harmonic Tremors

question 107

Multiple Choice

Which of the following is true regarding harmonic tremors?

• A)they are associated with the sharp release of energy when two pieces of land move against each other,as along a fault.
• B)they are produced by sub-surface movement of magma beneath a volcano.
• C)they are associated with movements in the crust caused by cities and traffic.
• D)they are produced by explosive volcanic eruptions.
• E)they are audible from the surface as a high pitched noise that indicates that the eruption is imminent.

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