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Braden Walsh

Mr Braden Walsh

Phone:+64 (06) 356 9099 x85896

Tertiary education

  • 2013
  • Masters of Science Research (MScRes) Geophysics and Seismology - Saint Louis University, USA
  • 2011
  • Bachelor or Science (BSc) Applied Geophysics - University of Nevada, Reno, USA

PhD Research


“Analyzing seismic signals to understand volcanic mass flow emplacement ”


Braden Walsh
Obsidian dome, Mammoth Lakes, California

There are many dangers and risks on and around volcanic terrains. People, industry, and agriculture are all affected by the hazards of not only volcanic eruptions and lava flows, but also to volcanic processes such as debris flows, debris avalanches, lahars, etc. Volcanic flows or mass flows can, have, and do destroy, and damage many structures and lives. Predicting and understanding volcanic mass flows, such as lahars, is one of the biggest problems facing researchers in volcanology. Many highly populated areas around the world are in danger of volcanic flows. Being able to predict and sense these flows could be significant in helping save lives in these areas. Research conducted in this area of volcanology requires the collection of geophysical data in real-time from volcanic mass flow events. Through the collection of geophysical and seismological data collected from mass flows, analysis about their location and dynamics may be determined. Another reason for using seismometers is that these instruments can be placed at a distance from the flow channel and still record day or night and in any weather conditions. The distance provides safety to researchers and prevents the instruments from being destroyed. Two emerging methods, amplitude source location (ASL) and active seismic source both show promise not only in determining the dynamics and locating volcanic mass flows after the event, but also in automating the techniques for real time warning and location prediction. Both of these seismological methods will be used to determine the dynamics and location of mass flows around the world.

Research Objectives

  • Understanding the physical properties and dynamics of lahars through the use of geophysical instruments.
  • Determination of location/tracking of movements of lahars by seismological means.
  • Development of risk management solutions for pre-event guidelines, during event warnings, and post-event calibrations.
  • Publications

    • Journal Articles

    • Walsh, B., Jolly, A.D., Procter, J.N., (2017), Calibrating the amplitude source location (ASL) method using active seismic sources: An example from Te Maari Volcano, Tongariro National Park, New Zealand, Geophys. Res. Lett., 44, doi:10.1002/2017GL073000.
    • Walsh, B., Jolly, A.D., Procter, J.N., (2016), Seismic analysis of the 13 October 2012 Te Maari, New Zealand, lake breakout lahar: Insights into flow dynamics and the implications on mass flow monitoring, Journal of Volcanology and Geothermal Research, v. 324, p. 144-155.


    Braden Walsh
    Mt. Ruapehu and Ngauruhoe, New Zealand
    Braden Walsh
    Presenting 2012 Te Maari lahar data at AGU 2016, San Francisco, California