scholarly journals Fault Zone Guided Wave generation on the locked, late interseismic Alpine Fault, New Zealand

2015 ◽  
Vol 42 (14) ◽  
pp. 5736-5743 ◽  
Author(s):  
J. D. Eccles ◽  
A. K. Gulley ◽  
P. E. Malin ◽  
C. M. Boese ◽  
J. Townend ◽  
...  
Keyword(s):  
New Zealand ◽  
Fault Zone ◽  
Wave Generation ◽  
Guided Wave ◽  
Alpine Fault

scholarly journals Fault Zone Guided Wave generation on the locked, late interseismic Alpine Fault, New Zealand

2021 ◽  
Author(s):  
JD Eccles ◽  
AK Gulley ◽  
PE Malin ◽  
CM Boese ◽  
John Townend ◽  
...  
Keyword(s):  
Fault Zone ◽  
Plate Boundary ◽  
Guided Wave ◽  
S Wave ◽  
Low Velocity ◽  
Catchment Scale ◽  
Near Surface ◽  
Low Velocity Zone ◽  
Alpine Fault ◽  
Velocity Zone

© 2015. American Geophysical Union. All Rights Reserved. Fault Zone Guided Waves (FZGWs) have been observed for the first time within New Zealand's transpressional continental plate boundary, the Alpine Fault, which is late in its typical seismic cycle. Ongoing study of these phases provides the opportunity to monitor interseismic conditions in the fault zone. Distinctive dispersive seismic codas (~7-35Hz) have been recorded on shallow borehole seismometers installed within 20m of the principal slip zone. Near the central Alpine Fault, known for low background seismicity, FZGW-generating microseismic events are located beyond the catchment-scale partitioning of the fault indicating lateral connectivity of the low-velocity zone immediately below the near-surface segmentation. Initial modeling of the low-velocity zone indicates a waveguide width of 60-200m with a 10-40% reduction in S wave velocity, similar to that inferred for the fault core of other mature plate boundary faults such as the San Andreas and North Anatolian Faults.

Shallow fault segmentation of the Alpine fault zone, New Zealand revealed from 2- and 3-D GPR surveying

2010 ◽  
Vol 70 (4) ◽  
pp. 343-354 ◽  
Author(s):  
Alastair F. McClymont ◽  
Alan G. Green ◽  
Anna Kaiser ◽  
Heinrich Horstmeyer ◽  
Robert Langridge
Keyword(s):  
New Zealand ◽  
Fault Zone ◽  
Fault Segmentation ◽  
Alpine Fault

scholarly journals Supplementary material to "Micro- and nano-porosity of the active Alpine Fault zone, New Zealand"

2020 ◽  
Author(s):  
Martina Kirilova ◽  
Virginia Toy ◽  
Katrina Sauer ◽  
François Renard ◽  
Klaus Gessner ◽  
...  
Keyword(s):  
New Zealand ◽  
Fault Zone ◽  
Alpine Fault ◽  
Supplementary Material

scholarly journals Textural changes of graphitic carbon by tectonic and hydrothermal processes in an active plate boundary fault zone, Alpine Fault, New Zealand

2017 ◽  
Vol 453 (1) ◽  
pp. 205-223 ◽  
Author(s):  
Martina Kirilova ◽  
Virginia G. Toy ◽  
Nick Timms ◽  
Angela Halfpenny ◽  
Catriona Menzies ◽  
...  
Keyword(s):  
New Zealand ◽  
Fault Zone ◽  
Plate Boundary ◽  
Graphitic Carbon ◽  
Boundary Fault ◽  
Alpine Fault ◽  
Hydrothermal Processes ◽  
Textural Changes

Scientific basis for definition of a fault rupture hazard in Franz Josef Glacier, West Coast, New Zealand, and the fight to see use made of this information.

2020 ◽  
Author(s):  
Virginia Toy ◽  
Bernhard Schuck ◽  
Risa Matsumura ◽  
Caroline Orchiston ◽  
Nicolas Barth ◽  
...  
Keyword(s):  
New Zealand ◽  
Fault Zone ◽  
Complex Structure ◽  
Scientific Basis ◽  
Building Stock ◽  
Near Surface ◽  
Alpine Fault ◽  
Different Temperatures ◽  
Fault Trace ◽  
Definition Of

<p>There is currently around a 30% probability New Zealand’s Alpine Fault will accommodate another M~8 earthquake in the next 50 years. The fault passes through Franz Josef Glacier town, a popular tourist destination attracting up to 6,000 visitors per day during peak season. The township straddles the fault, with building stock and infrastructure likely to be affected by at least 8m horizontal and 1.5m vertical ground displacements in this coming event. New Alpine Fault science is presented here that adds to the strong evidence in support of moving the township northward and out of a 200m zone of deformation across the fault zone to mitigate future losses.</p><p>In 2011 two shallow boreholes were drilled at Gaunt Creek, as part of the Alpine Fault Drilling Project, DFDP. In cores collected from the deeper of these boreholes (DFDP-1B), two ‘principal slip zones (PSZ)’ were sampled, indicating the fault is not a simple geometrical structure. Subsequent studies of the recovered cores have demonstrated:</p><ol><li>The lower of the two PSZ in DFDP-1B has particle size distributions indicating it accommodated more coseismic strain than the shallower PSZ</li> <li>The PSZs sampled in the two boreholes have authigenic clay mineralogies diagnostic of different temperatures</li> </ol><p>These studies, combined with other recent outcrop studies nearby, highlight that the central Alpine Fault zone is a complex structure comprising multiple PSZ in the near surface, some of which may have been simultaneously active in past earthquakes. The results support previous studies (e.g. lidar mapping of offset Quaternary features) that underpinned definition of an ‘avoidance zone’ around the fault trace in the town. Sadly, local government has failed to acknowledge this risk in public legislature in a way that adequately protects tourism and community infrastructure, and the >1.3 million visitors passing through the region each year. We will explain other actions consequently taken to build awareness and resilience to this hazard.</p>

Structure and distribution of fault rocks in the Alpine Fault Zone, New Zealand

1981 ◽  
Vol 9 (1) ◽  
pp. 197-210 ◽  
Author(s):  
R. H. Sibson ◽  
S. H. White ◽  
B. K. Atkinson
Keyword(s):  
New Zealand ◽  
Fault Zone ◽  
Fault Rocks ◽  
Alpine Fault

scholarly journals Crustal anisotropy in the vicinity of the Alpine Fault Zone, South Island, New Zealand

1995 ◽  
Vol 38 (4) ◽  
pp. 579-583 ◽  
Author(s):  
David Okaya ◽  
Nikolas Christensen ◽  
Darrell Stanley ◽  
Tim Stern ◽  
South Island Geophysical Transect (
Keyword(s):  
New Zealand ◽  
Fault Zone ◽  
Crustal Anisotropy ◽  
Alpine Fault
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