Ambient Seismic Noise Analysis Associated with the 2010 Eruption of Merapi Volcano Using Temporal Variations of Randomness and Background Noise

Figure 10

Comparison of analysis results using RSAM, temporal variation of PSD, and daily number of events calculations of volcano-tectonics (VT) A+B, multiphase (MP), low-frequency (LF), and rockfalls (RF) during the Merapi eruption period 2010. The RSAM result and the daily event observation were carried out by BPPTKG [2]. It can be seen that the PSD calculation is able to show fluctuations in volcanic activity mainly related to the amount of VT, MP, and RF events better compared to RSAM calculation.