Product catalogue
Paleoseismology of the Akatore Fault, Otago, New Zealand
We present the results of a paleoseismic study of the Akatore Fault in the low seismicity region of Otago, New Zealand. Two trenches reveal at least three reverse fault ruptures that are constrained to have occurred between 13,314 B.C. and 680 A.D. (antepenultimate event), 737 and 960 A.D. (penultimate event) and 1047 and 1278 A.D. (most recent event), with a single-event displacement of 1.6–2.7 m. GPR profiles and sediment analyses show that a 125 ka marine terrace is likely also only displaced by these three events, suggesting these earthquakes have ended a minimum 110,000 year period of quiescence on the fault. The fault therefore appears to exhibit strong aperiodicity of earthquake occurrence, a characteristic previously suggested for the Akatore Fault and other well-studied Otago faults. Slip rate and recurrence interval for the current active period are 0.3–2.4 mm/yr and 670–5110 years respectively, and we suggest for seismic hazard assessments in nearby Dunedin it is prudent to assume that the high rates of recent earthquakes will continue into the immediate future on the Akatore Fault.
Simple
Identification info
- Date (Publication)
- 2019-07-24
- Date (Revision)
- 2020-10-01T02:22:27
- Citation identifier
- ga-dataSetURI/https://pid.geoscience.gov.au/dataset/ga/127941
- Cited responsible party
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Role Organisation / Individual Name Details Author Taylor-Silva, B.
Author Stirling, M.
Author Litchfield, N.
Author Griffin, J.D.
Author van den Berg, E.
Author Ningsheng Wang, N.
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Paper submitted to New Zealand Journal of Geology and Geophysics by GA collaborator at Otago University New Zealand. GA is junior author (undertaking PhD)
- Status
- Final
- Spatial representation type
- Topic category
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- Geoscientific information
Extent
Extent
))
- Maintenance and update frequency
- Not planned
Resource format
- Title
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Administration to complete
- Edition
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Administration to complete
- Discipline
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paleoseismology
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- Keywords
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Akatore Fault
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- theme.ANZRC Fields of Research.rdf
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EARTH SCIENCES
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- Keywords
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Otago
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aperiodicity
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OXCAL
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OSL
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Published_External
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Resource constraints
- Title
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Creative Commons Attribution 4.0 International Licence
- Alternate title
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CC-BY
- Edition
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4.0
- Access constraints
- License
- Use constraints
- License
Resource constraints
- Classification
- Unclassified
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
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Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice
- OnLine resource
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Link to article
Link to article
- Distribution format
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html
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Resource lineage
- Statement
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Griffin is studying for a PhD at Otago University supported by a GA Development Grant from approx Aug 2018 for 3 years.
Griffin is a junior author on this paper and supports the broader understanding of earthquake recurrence which is application to the Australian context.
Paper appeared
NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
2020, VOL. 63, NO. 2, 151–167
- Hierarchy level
- Document
Metadata constraints
- Classification
- Unclassified
Metadata
- Metadata identifier
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urn:uuid/08b43ce0-d643-4b53-b697-c9c6d6a47fb8
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GeoNetwork UUID
Type of resource
- Resource scope
- Document
- Name
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Submission to external journal: New Zealand Journal of Geology and Geophysics
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/127955
- Date info (Creation)
- 2019-04-02T22:36:34
- Date info (Revision)
- 2019-04-02T22:36:34
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-3 (Draft Schemas 2015)
- Edition date
- 2015-07-01T00:00:00
- Title
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
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Version 2.0, April 2015