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    I am at GNS Science, Wairakei Research Centre (Taupo), as Geonet Volcano Network Co-ordinator.
    Over the last 3-4 years I have been drilling 50-400m deep holes to install downhole seismometers and tiltmeters at Auckland, Taranaki and Ruapehu for earthquake and deformation monitoring.  I think we've done about 6 to date and have several more planned.

    I have a budget of around $200k per year for borehole work in the GeoNet workplan. This normally gets me 2 holes plus instrumentation.

    I've mostly used Boart Longyear for drillers and have used a range of rigs from truck mounted to helicopter portable and from wash drilling to diamond coring depending on location, geology and depth needed. 

    Mostly I'm interested in the hole not the rock that comes out of it, as the aim is to install instrumentation rather than extract geologic information - although the holes are still logged geologically but not to any great detail.

    I have also used existing abandoned waterwalls to install downhole seismic instruments - particularly in Auckland - so I'm interested in knowing where such holes exist. I have used a database from Auckland University to help find such holes.

    For further information, see my profile Webpage at GNS


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