Poster #202, Seismology

Understanding the physical properties of the Kilauea volcano by analyzing Long-Period volcanic earthquakes

Monica A. Diaz, Zachary E. Ross, & John Wilding
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Poster Presentation

2021 SCEC Annual Meeting, Poster #202, SCEC Contribution #11378 VIEW PDF
Long-period volcanic earthquakes are a vital resource in volcano seismology. These events are associated with deformational changes and the dynamics of volcanoes that lead to predictions of seismic hazard events. This project performs an analysis of low-frequency events during the 2018 Kilauea caldera collapse and eruption in the East Rift Zone. To investigate the area, we analyzed the vertical components of over 76,324 P waveforms across 100 stations. We then calculated the frequency index (FI) for each event, and examined spectograms to determine the type of seismic event, separating them by high and low frequency energy. We considered FI values <-0.51 to be low-frequency events, while classifying events with FI values >-0.30 as high frequency. Hybrids events were found between the range of lower and high frequency. By classifying LP events during 2018 and looking at their spatial and temporal distribution, we can better understand the behavior of magma during the sequence.