IAVCEI Portland 14-18 Aug, 2017
This session aims at different geophysical monitoring techniques which
can be combined and integrated to achieve two major goals: Firstly, the
imaging of volcanic source processes from the surface to the deep plumbing
system, and secondly, the interpretation of geophysical signals that enable
us to assess the state of volcanic activity. We aim to identify geophysical
signals that are characteristic in defining background levels, detecting
unrest and evaluating ongoing volcanic activity.
Seismic monitoring, including infra sound, remains at the core of any
monitoring program. While well-established seismic monitoring techniques
are routinely applied, major advances in volcano seismology have been made
in recent years allowing us to identify several categories of volcanic
seismic signals, and interpret them in terms of different magmatic or tectonic
processes encountered at a volcano. This session will review the wide range
of seismic monitoring techniques and interpretation methods from low-cost,
basic set-ups to the latest sophisticated seismological applications and
modelling methods. Accordingly, we aim to cover the entire seismic frequency
range from short-period to ultra-long period seismicity, tilt and other
deformation signals in different volcanic settings.
Volcanoes arrive at a critical state after weeks or even years of unrest
before the onset of surface activity. During this period electromagnetic
and geochemical methods appear to be sensitive to transient anomalous signals
caused by the movement of magmatic and hydrothermal fluids. Only at a later
stage seismic activity as well as ground deformation become more obvious.
Therefore, we particularly welcome case studies that combine monitoring
or modelling techniques of seismicity, electromagnetic signals, ground
deformation, infrasound, gas monitoring, gravimetry, petrology and fluid
dynamics of magmatic systems.