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HOBITSS Expedition Lecture

When:

Tue 30 Jun 2015, 7:30pm

Where: National Aquarium of New Zealand, 546 Marine Parade, Napier, Hawke's Bay / Gisborne

Restrictions: All Ages

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Listed by: Napier City Council

Slowly Slipping Earthquakes at the Hikurangi Subduction Zone
Laura Wallace
University of Texas Institute for Geophysics

The Hikurangi subduction zone is where the Pacific Plate dives down or “subducts” beneath the eastern North Island. The boundary between the eastern North Island and the Pacific Plate is called the Hikurangi megathrust. The speaker will discuss “slow slip events”, which are an exciting new form of fault slip behavior observed on the Hikurangi megathrust beneath the Hawkes Bay, Gisborne, Kapiti, and Manawatu regions. Slow slip events beneath the North Island also have important implications for our understanding of the earthquake and tsunami hazard posed by the Hikurangi megathrust.

The talk will also introduce a recent international scientific investigation of slow slip events and earthquakes offshore Gisborne that involved the deployment of 35 seafloor instruments belonging to the United States and Japan. The instruments were deployed between May 2014 and June 2015 to monitor seismicity and seafloor deformation related to slow slip beneath Poverty Bay.

Dr. Laura Wallace is a Research Scientist at the University of Texas Institute for Geophysics. Prior to her arrival at the University of Texas, Laura was a research scientist at GNS Science in Lower Hutt for nearly a decade. Laura uses a variety of methods to investigate deformation of the Earth’s crust at tectonic plate boundaries, with a particular focus on subduction zone plate boundaries. She undertakes research at various locations in the western Pacific, and she has spent much of her career trying to better understand earthquake processes on the Hikurangi subduction zone beneath the eastern North Island. Much of her recent work has been focused on investigating “slow slip events”, a recently discovered form of fault slip behavior, which are now known to occur frequently on Hikurangi subduction zone.

Contact Carol Larson carol@nationalaquarium.co.nz for more information.

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