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Kaikōura Earthquake marine survey response

We invite staff and students to Undercroft 101 to attend a presentation by Dr Joshu Mountjoy, Marine Geologist, National Institute of Water and Atmospheric Research (NIWA). 

Dr Joshu Mountjoy is a UC alumnus who completed his PhD thesis in Geology in 2009.

Date:                     17 August 2017

Time:                    1-2 pm

Location:             Undercroft 101 Seminar Room

170810 joshu_mountjoy__niwaThe marine survey response to the Mw7.8 14 November 2016 Kaikōura Earthquake commenced within a few days of the event. This involved redeployment of R.V. Tangaroa from a paleo-seismological survey that was coincidentally taking place off the east coast of North Island at the time. Since then, additional survey data were collected on NIWA’s coastal vessel Ikatere, and during three further, somewhat opportunistic, surveys by Tangaroa.

These surveys collectively acquired high-resolution multibeam bathymetry data, sub-bottom profiles, sediment cores, and video transects with three primary objectives:

  1. Identifying the seaward extensions of co-seismic surface faulting off the North Canterbury and eastern Marlborough coasts; and
  2. Identifying the extent of co-seismic submarine landslides triggered in Kaikōura Canyon, and an associated turbidity current that carried sediment more than 600km along the Hikurangi Trough to beyond Hawkes Bay.
  3. Assess the impact of the earthquake on benthic communities in the Kaikōura Canyon

This seminar will outline the results of this work, discuss their local and global implications, and how the marine studies have been integrated with the wider geoscience response work.