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Real-time Seismic and Spectral Measurement
These images show RSAM and SSAM during the last month at the station on White Island.
RSAM (Real-time Seismic-Amplitude Measurement) and SSAM (Seismic Spectral-Amplitude Measurement) are techniques that permit volcano seismologists to evaluate the nature of seismicity at a volcano. They are able to recognize subtle shifts in frequency related to changing dynamics of magma or gas movement within the volcano, or the amount and style of volcanic tremor. They also show other noise like windy weather or traffic.
