New Zealand Fault-Rupture Depth Model v1.0: a provisional estimate of the maximum depth of seismic rupture on New Zealand’s active faults
This report and associated data presents a new and provisional estimate of the maximum depth of rupture on New Zealand’s active faults (“New Zealand Fault-Rupture Depth Model v1.0”) based on a combination of two independent models. The first model uses regional seismicity distribution from a relocated earthquake catalogue to calculate the 90% seismicity cut-off depth (D90) representing the seismogenic depth limit H. This is multiplied by an overshoot factor representing dynamic propagation of rupture into the conditional stability zone and accounting for the difference between regional seismicity depths and frictional properties of a mature fault zone, to arrive at rupture depth Df. The second model uses surface heat-flow and rock type to compute thermal stability limits for seismogenic faults. These limits are also multiplied by an overshoot factor to arrive at a thermally-based maximum rupture depth Df. Both models have depth cut-offs at the Moho and/or subducting slabs. Results indicate maximum rupture depths between 8 km (Taupō Volcanic Zone) to > 30 km (e.g. southwest North Island), strongly correlated with regional thermal gradients. Preliminary estimates of uncertainties for each model are also discussed. Depths from the two models show broad agreement for most of the North Island and some differences in the South Island. A combined model using weighting based on relative uncertainties is derived and validated using constraints from hypocentre and slip model depths from recent well-instrumented earthquakes. (auth)
DOI: https://doi.org/10.21420/0BBW-V059
Cite data as:
Ellis SM, Bannister S, Van Dissen RJ, Eberhart-Phillips D, Holden C, Boulton C, Reyners ME, Funnell RH, Mortimer N, Upton P. 2021. New Zealand Fault Rupture Depth Model v1.0: a provisional estimate of the maximum depth of seismic rupture on New Zealand’s active faults. Lower Hutt (NZ): GNS Science. 47 p. (GNS Science report; 2021/08). doi:10.21420/4Q75-HZ73. (with data set available at DOI: https://doi.org/10.21420/0BBW-V059 )
Simple
- Date (Publication)
- 2021-03-10
- Status
- Completed
- Point of contact
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Organisation name Individual name Electronic mail address Role GNS Science
Point of contact
- Maintenance and update frequency
- Not planned
- Keywords
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New Zealand Active Faults
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New Zealand Fault-Rupture Depth Model v1.0
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seismicity
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earthquakes
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earthquake rupture depth
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hypocentre
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crust
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lithology
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fault slip
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New Zealand National Seismic Hazard model
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tectonics
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New Zealand community Fault Model
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- Classification
- Unclassified
- Use constraints
- License
- Other constraints
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(C) Institute of Geological and Nuclear Sciences Limited.
This material is licensed under a Creative Commons Attribution International 4.0 (CC BY 4.0) Licence. For more details visit https://creativecommons.org/licenses/by/4.0/. Where the data are used in a figure GNS Science requests attribution in the following manner: (C) GNS Science. Where reference to the data is to be included in a Reference List the following citation is suggested:
Ellis SM, Bannister S, Van Dissen RJ, Eberhart-Phillips D, Holden C, Boulton C, Reyners ME, Funnell RH, Mortimer N, Upton P. 2021. New Zealand Fault Rupture Depth Model v1.0: a provisional estimate of the maximum depth of seismic rupture on New Zealand’s active faults. Lower Hutt (NZ): GNS Science. 47 p. (GNS Science report; 2021/08). doi:10.21420/4Q75-HZ73. (with data set available at DOI: https://doi.org/10.21420/0BBW-V059 )
- Use limitation
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The New Zealand Fault Rupture Depth Model v1.0 is owned by GNS Science and is based on the model explained in:
Ellis SM, Bannister S, Van Dissen RJ, Eberhart-Phillips D, Holden C, Boulton C, Reyners ME, Funnell RH, Mortimer N, Upton P. 2021. New Zealand Fault Rupture Depth Model v1.0: a provisional estimate of the maximum depth of seismic rupture on New Zealand’s active faults. Lower Hutt (NZ): GNS Science. 47 p. (GNS Science report; 2021/08). doi:10.21420/4Q75-HZ73. (with data set available at DOI: https://doi.org/10.21420/0BBW-V059 )
That report carries the following limitation, which also applies to this dataset:
"The Institute of Geological and Nuclear Sciences Limited (GNS Science) and its funders give no warranties of any kind concerning the accuracy, completeness, timeliness or fitness for purpose of the contents of this report. GNS Science accepts no responsibility for any actions taken based on, or reliance placed on the contents of this report and GNS Science and its funders exclude to the full extent permitted by law liability for any loss, damage or expense, direct or indirect, and however caused, whether through negligence or otherwise, resulting from any person’s or organisation’s use of, or reliance on, the contents of this report."
- Language
- English
- Topic category
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- Geoscientific information
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- Begin date
- 2020-03-31
- End date
- 2021-03-31
- Distribution format
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Name Version csv
- OnLine resource
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Protocol Linkage Name WWW:LINK-1.0-http--link
WWW:DOWNLOAD-1.0-http--download
https://huta22.gns.cri.nz/metadata/srv/api/records/11931337-3d54-494d-be28-6ffc3fda42dc/attachments/sr_2021-008.pdf WWW:DOWNLOAD-1.0-http--download
https://huta22.gns.cri.nz/metadata/srv/api/records/11931337-3d54-494d-be28-6ffc3fda42dc/attachments/ESupp1_RuptureDepthSurfaces_v1.0.csv
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- Statement
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If n\a remove by deleting the 'Data quality info' heading
Metadata
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- 11931337-3d54-494d-be28-6ffc3fda42dc XML
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- Hierarchy level
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- Hierarchy level name
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Dataset
- Date stamp
- 2022-06-09T09:42:16
- Metadata standard name
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ISO 19115:2003/19139
- Metadata standard version
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1.0
- Metadata author
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Organisation name Individual name Electronic mail address Role GNS Science
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