IAVCEI 2013–Session and related Workshop: New methods/computer codes for volcano monitoring
From: Martha Savage <Martha.Savage@xxxxxxxxx>
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NEW ABSTRACT DEADLINE REMINDER: Noon, Japan time, 15th February
IAVCEI 2013 SYMPOSIUM session 2-3 “Stress, strain and mass changes at active volcanoes”
Also see below for details on related workshop: New Methods/computer codes for volcano monitoring
The IAVCEI 2013 Scientific Assembly will be held at Kagoshima, Japan, on 20-24 July 2013.
Session Conveners:
Nico Fournier (GNS Science, NZ)
Yosuke Aoki (ERI, Japan)
Martha Savage (VUW, NZ)
Joachim Gottsmann (Univ. Bristol, UK)
Michael Poland (USGS, Hawaii)
Invited speakers:
Diana Roman
Florent Brenguier
t.b.a
Abstract:
2-3. Stress, strain, and mass changes at active volcanoes
Nico Fournier* (n.fournier@xxxxxxxxxx),Yosuke Aoki, Martha Savage, Joachim Gottsmann, Michael Poland
One of the main goals of current volcanological research is
the identification of reliable precursors to the onset of eruptions, or
to changes in an ongoing eruption. Stress/strain and mass changes at
volcanoes have traditionally been monitored using geodetic
techniques as a vital indicator of magma migration through the edifice,
volcano-tectonic interactions or hydrothermal unrest. In most cases,
though, geodesy essentially remains used as an a posteriori assessment
of long term changes of activity, and not as
a truly near real-time monitoring tool. Furthermore, when
stress/strain changes are detected at volcanoes, the discrimination
between volcanic or tectonic processes as their main source often
remains ambiguous. Recently, several new methods of measuring localised
changes in crustal stress and strain (deformation) have been applied to
volcanoes with promising results. These methods have included analysis
of data from high-rate cGPS networks, SAR, LiDAR, tiltmeters, and
volumetric strainmeters; analysis of time variations
in gravity and magnetic data; and analysis of changes in seismic wave
speeds measured using repeating earthquakes and noise (noise
tomography), changes in earthquake fault and slip orientation
(fault-plane solution analysis), and changes in the directional
variation of seismic wave speed (seismic anisotropy analysis). The main
goal of this session is to highlight a wide range of observations
of phenomena that may be linked to temporal changes in stress and strain
and associated rock or magma properties at varying
timescales on restless or active volcanoes, including but not limited
to temporal changes in proximal and distal seismicity, surface
deformation, gas emissions, microgravity, self-potential, and
volcano hydrology. A second goal is to encourage discussion,
refinement, and synthesis of physical and numerical models for
the observed changes. We encourage contributions from both observational
and theoretical perspectives and particularly studies that combine two
or more techniques.
IAVCEI 2013–related Workshop: New methods/computer codes for volcano monitoring
The next IAVCEI meeting will be at Kagoshima from 20-24 July 2013. We are planning a parallel workshop to take place before the meeting, on Friday 19 July 2013 in Kagoshima. This workshop is not on the official workshop list, but it complements session 2-3 “Stress, strain and mass changes at active volcanoes”. The workshop will be focused on teaching new methods for calculating parameters that are useful in volcano monitoring. The workshops will consist of session with people describing the techniques and later sessions for hands-on learning. Sample data sets will be provided for each of the methods and will be discussed at the workshop. The topics below will be offered.
Program is:
- MFAST shear-wave splitting package and associate TESSA tomography package: Presenters Martha Savage, Jessica Johnson and Ernestynne Walsh (MFAST is written with free publicly available software; TESSA requires MATLAB)
- Methodology and programs for using background seismic noise to monitor changes in surface wave velocity with time. The package called MSNoise (Monitoring using Seismic Noise) will be used and is written in Python (no Matlab needed). Presenters Florent Brenguier and Thomas Lecocq, from the Royal Observatory of Belgium will be presenting it.
- Programs for how to invert GPS data for simple pressure source characteristics using either MATLAB or Python. Presenters: Nico Fournier and/or Flavio Cannavo
- The basics of how to use the PyLith finite element code for the solution of dynamic and quasi-static tectonic deformation problems. Presenter: Charles Williams, Adrian Shelley
- Seismic amplitude ratio analysis. Presenter Benoit Taisne.
The workshop is free, but you need to sign up by May 1 with an indication of which sessions you are most interested in attending. More specific information is on the IAVCEI web page http://www.iavcei2013.com/related_meetings/related_meetings.html#W03.
Kind Regards,
Martha Savage
Professor of Geophysics
SGEES
Victoria University of Wellington
Te Whare Wananga o te Upoko o te Ika a Maui
Box 600, Wellington, 6140
New Zealand
Email: Martha.Savage@xxxxxxxxx
DDI: +64 (0)4 463-5961
mobile: 021-262-7516
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