Three-dimensional coseismic deformation of the 2016 MW7.8 Kaikuora, New Zealand earthquake obtained by InSAR and offset measurements

Liu, Jiao; Zhang, Guohong; Wang, Jiaqing; Sun, Guibo; Zhang, Yingfeng; Wang, Yanzhao; Qu, Chunyan; Shan, Xinjian

doi:10.1016/j.geog.2022.02.004

Cited by 4 publications

(2 citation statements)

References 32 publications

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“…New Zealand is located in the southwestern Pacific Ocean and is a multi-seismic country with up to 15000 earthquakes of all sizes recorded annually [9][10]. As New Zealand is located at the junction of the Pacific Plate and the Indian Ocean plate, it is the zone of plate collision and compression, and is part of the Pacific Rim volcanic Seismic zone.…”

Section: Evaluation On the Occurrence Of Earthquakes In New Zealandmentioning

confidence: 99%

Comparative Evaluation on the Response of New Zealand Buildings to Natural Disasters

2023

jceup

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With the development of science and technology, research on the response of New Zealand buildings to natural disasters is constantly improving. The exploration of building improvement in New Zealand under natural disasters and the construction and design of natural disaster assessment models based on DRI (Disaster Risk Index) are becoming increasingly important. How to reduce building risks during earthquakes is currently a key issue that urgently needs to be addressed in the entire research on building response to natural disasters in New Zealand. In this paper, based on the relevant research on the earthquake and tsunami in New Zealand, with the help of the absolute disaster level and relative disaster level calculation formula, combined with the simulation experiment, and according to the data results, the following conclusions are drawn: under the natural disasters dominated by earthquakes, New Zealand has improved its buildings in five aspects: building code, construction standards, construction levels, material use, and construction links, and based on the DRI natural disaster assessment model, the comprehensive average reduction in building risk under natural disasters was 15.5%, while the comprehensive average reduction in casualties was 11.5%. This indicates that the natural disaster assessment model based on DRI has a good practical application effect in New Zealand's construction response to natural disasters.

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Section: Evaluation On the Occurrence Of Earthquakes In New Zealandmentioning

confidence: 99%

Comparative Evaluation on the Response of New Zealand Buildings to Natural Disasters

2023

jceup

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“…The application of InSAR to map and monitor slow-moving deformation related to landslides is well documented globally (Aslan et al 2020;Béjar-Pizarro et al 2017;Barra et al 2016;Colesanti and Wasowski 2006;Crosetto et al 2018;Del Soldato et al 2019;Isya et al 2019;Notti et al 2014;Wasowski and Bovenga 2014;Xue et al 2021). However, the application of InSAR for geotechnical purposes in New Zealand is in its infancy, even though the technique has been used successfully to investigate other natural hazards such as volcanoes (Hole et al 2007;Hamling et al 2015;Hamling 2020;Harvey 2021) and earthquakes (Barnhart et al 2011;Atzori et al 2012;Elliott et al 2012;Hu et al 2012;Liu et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Investigating slow-moving shallow soil landslides using Sentinel-1 InSAR data in Gisborne, New Zealand

et al. 2022

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Landslides are widespread geomorphological features on the North Island of New Zealand, where they represent one of the primary landscape-forming processes. This study focuses on the steepland terrain surrounding Gisborne, a city located on the east coast of the North Island, at the Hikurangi subduction margin. This terrain consists of young, weak, sedimentary rocks and soils; the most common modes of slope failures are soil creep, slides and flows in shallow, clay-rich soil and regolith, triggered by heavy rainfall. Based on observational data from Sentinel-1 imagery, this study leverages results from interferometric synthetic aperture radar (InSAR) processing to reveal the distribution of deformation across Gisborne’s steepland periphery from January 2016 to December 2021. Velocities in the line of sight were obtained from the stack of interferograms and projected along the direction of maximum slope, to extract the true displacement on the slopes. The ascending and descending data sets were combined to reveal the vertical and horizontal components of the deformation. The results were combined with a regional LiDAR data set, aerial imagery and field observations to delineate areas of slope deformation. Finally, slope deformation time series data was compared with rainfall records to identify seasonal changes, due to shrinking and swelling of expansive soils. Although the InSAR displacement data contains some noise, results could be used to identify 132 unstable slopes within the study area, caused by soil creep and earthflows. Also, the shrink-swell of expansive soils causes a seasonal pattern of displacements, which varied by 10–20 mm/year between Austral winter and summer, strongly correlated to rainfall.

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Investigation of the application of geospatial artificial intelligence for integration of earthquake precursors extracted from remotely sensed SAR and thermal images for earthquake prediction

Zakaria

Ebadi

Ahmadi

2023

Multimed Tools Appl

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Three-dimensional coseismic deformation of the 2016 MW7.8 Kaikuora, New Zealand earthquake obtained by InSAR and offset measurements

Cited by 4 publications

References 32 publications

Comparative Evaluation on the Response of New Zealand Buildings to Natural Disasters

Comparative Evaluation on the Response of New Zealand Buildings to Natural Disasters

Investigating slow-moving shallow soil landslides using Sentinel-1 InSAR data in Gisborne, New Zealand

Investigation of the application of geospatial artificial intelligence for integration of earthquake precursors extracted from remotely sensed SAR and thermal images for earthquake prediction

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