On the use of electromagnetics for earth imaging of the polar regions

GJ Hill - Surveys in Geophysics, 2020 - Springer
The polar regions are host to fundamental unresolved challenges in Earth studies. The
nature of these regions necessitates the use of geophysics to address these issues, with …

Electrical resistivity cross-section across the Garhwal Himalaya: Proxy to fluid-seismicity linkage

G Rawat, BR Arora, PK Gupta - Tectonophysics, 2014 - Elsevier
Magnetotelluric (MT) measurements along a profile cutting across the Garhwal Himalaya of
India are inverted to obtain 2-D electrical resistivity structures of the Himalayan wedge and …

[HTML][HTML] On Archean craton growth and stabilisation: Insights from lithospheric resistivity structure of the Superior Province

GJ Hill, EA Roots, BM Frieman, R Haugaard… - Earth and Planetary …, 2021 - Elsevier
The nature of lithospheric evolution and style of the driving tectonic processes during the
growth and stabilisation of continental crust in the Archean remain enigmatic. The hotter …

Slow wavespeeds and fluid overpressure in a region of shallow geodetic locking and slow slip, Hikurangi subduction margin, New Zealand

D Bassett, R Sutherland, S Henrys - Earth and Planetary Science Letters, 2014 - Elsevier
Travel times recorded onshore from active-source marine seismic surveys were used to
determine Hikurangi forearc wavespeeds. Ray-path midpoints sample forearc crust above …

Magmatic, hydrothermal and ore element transfer processes of the southeastern Archean Superior Province implied from electrical resistivity structure

EA Roots, GJ Hill, BM Frieman, PE Wannamaker… - Gondwana …, 2022 - Elsevier
Although magmatic-and metamorphic-derived fluids are widely recognized mineralizing
agents, the role of crustal architecture in defining source and sink zones within the middle to …

Modeling geoelectric fields and geomagnetically induced currents around New Zealand to explore GIC in the South Island's electrical transmission network

T Divett, M Ingham, CD Beggan… - Space …, 2017 - Wiley Online Library
Abstract Transformers in New Zealand's South Island electrical transmission network have
been impacted by geomagnetically induced currents (GIC) during geomagnetic storms. We …

Mapping subduction interface coupling using magnetotellurics: Hikurangi margin, New Zealand

W Heise, TG Caldwell, S Bannister… - Geophysical …, 2017 - Wiley Online Library
The observation of slow‐slip, seismic tremor, and low‐frequency earthquakes at subduction
margins has provided new insight into the mechanisms by which stress accumulates …

Seismotectonics and seismogenesis of Mw7. 8 Gorkha earthquake and its aftershocks

BR Arora, BK Bansal, SK Prajapati, AK Sutar… - Journal of Asian Earth …, 2017 - Elsevier
Abstract The April 25, 2015, Mw7. 8 Gorkha earthquake in central Nepal was followed by
intense aftershock activity, including Mw6. 7 shock on April 26, 2015 and Mw7. 3 shock on …

Thermal regime of the northern Hikurangi margin, New Zealand

A Antriasian, RN Harris, AM Tréhu… - Geophysical Journal …, 2019 - academic.oup.com
We present 96 new seafloor heat flow determinations, made with a 3.5-m violin-bow probe
and collocated with seismic reflection profiles, from the northern Hikurangi margin on the …

Calculation of GIC in the North Island of New Zealand using MT data and thin‐sheet modeling

K Mukhtar, M Ingham, CJ Rodger… - Space …, 2020 - Wiley Online Library
Geomagnetically induced currents (GICs) in the North Island New Zealand power
transmission network during two large magnetic storms are calculated from both …