Frequency domain inversion of synthetic long period volcanic events

Bremen (Germany)

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.