Geoscience Society of New Zealand Branch Talk
by Weibke Heise (GNS Science)
The magnetotelluric (MT) method uses natural variations of magnetic and electric fields at the Earth’s surface to investigate the electrical conductivity structure of the Earth, from the near surface to mantle depth. Since rocks that contain fluids (or are partially melted) are orders of magnitude more conductive (or less resistive) than otherwise, the MT method is fine-tuned for understanding the role of fluids in tectonic, volcanic and geothermal processes. This talk will summarise long-term research projects on the North Island (Fig 1) undertaken at GNS Science over the past decade, concluding with a new study on the lower South Island initiated in 2021 (led by Otago Uni) to understand the hazard to NZ’s national (electric power transmission) grid caused by Geomagnetic Induced Currents (GIC) during large solar storms (aka solar tsunamis!).
The talk will also be available live via Zoom at the following link:
|Date||Thursday, 22 April 2021|
|Time||5:00pm - 6:30pm|
|Location||Benson Common Room (Gn9), Geology Building, University of Otago, Dunedin|
|Contact Name||Geology Office|