Case study: Borehole array in Japan

November 2004

A network of 14 instruments installed as an upgrade to a pre-existing array.

Very Deep Borehole Installations

April 2008

Güralp Systems Ltd. recently delivered and installed two seismic sensors in deep boreholes in California and Japan.

New borehole instruments for the South Pole

December 2006

A new-generation CMG-3TB instrument with adaptations for cold conditions is headed for the South Pole as part of a major upgrade to the world's quietest seismic station.

Determining sensor orientation

A MATLAB extension to Scream! can calculate the orientation of a borehole sensor by correlating signals with those measured at a reference instrument.

Creating low noise environments for borehole seismometers

How to drill and finish boreholes for the lowest noise levels.

Earthing a borehole sensor

Best practices for connecting sensors effectively to ground.

New borehole array in Africa

March 2005

Güralp Systems has been chosen to provide the borehole instrumentation for a major new seismic array in Central Africa.

Güralp débuts all-in-one borehole solution

May 2004

Güralp Systems is designing a complete seismic station in a borehole for the Swiss Seismological Survey (SED) and ETH Zürich, which combines weak and strong motion sensors to yield an effective dynamic range over 200 dB.

Borehole instruments reach the South Pole

March 2003

A Güralp CMG-3TB borehole instrument has been installed in the ‘Quiet Sector’, 8 km from the South Pole, as part of the recently-commissioned SPRESSO (South Pole Remote Earth Science and Seismological Observatory. Initial results show the site to be among the quietest ever measured.

Borehole station installed in the US

January 2001

Güralp Systems engineers have assisted in the installation of a multi-instrument seismic station in the US.

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