Frequency domain inversion of synthetic long period volcanic events

Abstract

Source inversion for long period (LP) events in volcanic areas is an ongoing research topic. The high interest of volcanologists to understand the physical phenomena which govern these characteristic events is related to the fact that they may be directly generated by uid transfers and some of them could be candidates for volcanic activity parameters, or precursors of volcanic eruptions. The signal class of LP-type events generally includes di erent volcanic transients with dominant frequencies in the range between 0.5 and 5 Hz. Although some source models have been proposed to explain their generation (vibration of uid- lled cavities, etc.), the large variety of LP signal forms and the existence of alternative models to explain some of the observations, make it interesting to develop new inversion schemes. Our main goal is to propose an inversion methodology to determine LP source mechanisms and study these events through an exhaustive source inversion by using synthetic data.