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New deep seismic recorder will improve Auckland volcano readiness 11 May 2008

Posted by admin in Auckland, natural hazards, New Zealand, volcano monitoring, volcanology.
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GNS Science in New Zealand is improving its seismic network around the city of Auckland with the installation of the first of a network of deep seismic recorders in a 250m-deep disused borehole at Riverhead, about 20km north-west of the city of Auckland. At the moment a seismic network of five surface instruments is dedicated to picking up signs of volcanic unrest around the city.

[GeoNet Volcano Network Coordinator Craig Miller] said while the earthquake hazard in Auckland is not high by New Zealand standards, the focus of the recording instruments in Auckland was on small earthquakes that might precede a volcanic eruption. ‘By getting away from human ground noise, a borehole recorder will enable better data to be collected that can be used to give timely warning of a possible future volcanic eruption in Auckland.’

The new deep instrument, shielded from surface noise and more sensitive to small tremors, brings the network to six, and GNS Science plans to install more deep instruments in boreholes around Auckland in the near future.

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Information
Global Volcanism Program: Auckland – summary information for the Auckland volcanic field (0401-02=)

News
New recorder boosts earthquake, volcano warningsNZ Herald, 11 May 2008
Borehole instrument boosts earthquake monitoring in Auckland – GNS Science press release, 9 May 2008

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