Constraints on Probabilistic Seismic-Hazard Models from Unstable Landform Features in New Zealand

2006 ◽  
Vol 96 (2) ◽  
pp. 404-414 ◽  
Author(s):  
M. W. Stirling
Keyword(s):  
New Zealand ◽  
Seismic Hazard ◽  
Hazard Models ◽  
Probabilistic Seismic Hazard

A Hybrid Time‐Dependent Probabilistic Seismic‐Hazard Model for Canterbury, New Zealand

2016 ◽  
Vol 87 (6) ◽  
pp. 1311-1318 ◽  
Author(s):  
Matthew C. Gerstenberger ◽  
David A. Rhoades ◽  
Graeme H. McVerry
Keyword(s):  
New Zealand ◽  
Seismic Hazard ◽  
Hazard Model ◽  
Time Dependent ◽  
Probabilistic Seismic Hazard

scholarly journals Seismic hazard of the Canterbury region, New Zealand

2008 ◽  
Vol 41 (2) ◽  
pp. 51-67 ◽  
Author(s):  
Mark Stirling ◽  
Matthew Gerstenberger ◽  
Nicola Litchfield ◽  
Graeme McVerry ◽  
Warwick Smith ◽  
...  
Keyword(s):  
New Zealand ◽  
Seismic Hazard ◽  
Hazard Model ◽  
Source Model ◽  
Southern Alps ◽  
Earthquake Source ◽  
Probabilistic Seismic Hazard ◽  
Regional Pattern ◽  
New Methods

We present a new probabilistic seismic hazard model for the Canterbury region, the model superseding the earlier model of Stirling et al. (1999, 2001). The updated model incorporates new onshore and offshore fault data, new seismicity data, new methods for the earthquake source parameterisation of both datasets, and new methods for estimation of the expected levels of Modified Mercalli Intensity (MMI) across the region. While the overall regional pattern of estimated hazard has not changed since the earlier seismic hazard model, there have been slight reductions in hazard in some areas (western Canterbury Plains and eastern Southern Alps), coupled with significant increases in hazard in one area (immediately northeast of Kaikoura). The changes to estimated acceleration for the new versus older model serve to show the extent that major changes to a multidisciplinary source model may impact the final estimates of hazard, while the new MMI estimates show the added impact of a new methodology for calculating MMI hazard.

Preparation of the New Zealand earthquake catalogue for a probabilistic seismic hazard analysis

2001 ◽  
Vol 34 (1) ◽  
pp. 60-67 ◽  
Author(s):  
Peter McGinty
Keyword(s):  
New Zealand ◽  
Seismic Hazard ◽  
Hazard Analysis ◽  
Large Earthquake ◽  
Return Time ◽  
Earthquake Catalogue ◽  
Probabilistic Seismic Hazard Analysis ◽  
Seismic Hazard Analysis ◽  
Probabilistic Seismic Hazard ◽  
Data Sets

The seismic hazard from ground motions during a New Zealand earthquake is variable, and is dependent on the different tectonic processes that occur throughout the country. A modem probabilistic seismic hazard analysis (PSHA) combines various data sets to take account of these different environmental effects and rates of occurrence. Earthquake catalogue data can be used to give the rate of background or distributed seismicity in historical times, while paleoseismic data can be used to constrain the return time of large earthquakes. The background seismicity is assumed to occur as a time-independent Poisson process. To apply this assumption to a new PSHA of New Zealand, completeness levels for the New Zealand earthquake catalogue were established, and aftershocks or clusters of events that occurred close together in both space and time were removed from the catalogue. The level of hazard in a region can be depth-dependent, that is the risk of a large earthquake may come from a shallow crustal event or a deep subduction zone event, both having the same epicentral location but resulting in different levels of damage. The New Zealand earthquake catalogue has too many events that have been assigned restricted depths to be ignored. These events have been statistically redistributed into shallow crustal zones or deep subducted slab zones based on the last eleven years of catalogue data, when improvements in technology have reduced the number of restricted events.

The 2018 version of the Global Earthquake Model: Hazard component

2020 ◽  
Vol 36 (1_suppl) ◽  
pp. 226-251 ◽  
Author(s):  
Marco Pagani ◽  
Julio Garcia-Pelaez ◽  
Robin Gee ◽  
Kendra Johnson ◽  
Valerio Poggi ◽  
...  
Keyword(s):  
Seismic Hazard ◽  
Regional Scale ◽  
Global Scale ◽  
Hazard Models ◽  
Probabilistic Seismic Hazard ◽  
Implementation Phase ◽  
Current State ◽  
Scale Models ◽  
Earthquake Model ◽  
National Models

In December 2018, at the conclusion of its second implementation phase, the Global Earthquake Model (GEM) Foundation released its first version of a map outlining the spatial distribution of seismic hazard at a global scale. The map is the result of an extensive, joint effort combining the results obtained from a collection of probabilistic seismic hazard models, called the GEM Mosaic. Together, the map and the underlying database of models provide an up-to-date view of the earthquake threat globally. In addition, using the Mosaic, a synopsis of the current state-of-practice in modeling probabilistic seismic hazard at national and regional scales is possible. The process adopted for the compilation of the Mosaic adhered to the maximum extent possible to GEM’s principles of collaboration, inclusiveness, transparency, and reproducibility. For each region, priority was given to seismic hazard models either developed by well-recognized national agencies or by large collaborative projects involving local scientists. The version of the GEM Mosaic presented herein contains 30 probabilistic seismic hazard models, 14 of which represent national or sub-national models; the remainder are regional-scale models. We discuss the general qualities of these models, the underlying framework of the database, and the outlook for the Mosaic’s utility and its future versions.

Probabilistic Seismic Hazard Models

2014 ◽  
pp. 1-18
Author(s):  
Danielle Hutchings Mieler ◽  
Tatiana Goded ◽  
Mark Stirling
Keyword(s):  
Seismic Hazard ◽  
Hazard Models ◽  
Probabilistic Seismic Hazard
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