Product catalogue
Contribution of the Leech River-Devil's Mountain fault system to seismic hazard in Victoria, B.C.
The Devil’s Mountain fault is an active fault included in the 2014 USGS hazard model for Washington State. Recent neotectonic investigations have suggested that a west-northwestwards extension of the fault (the Leech River fault) has sea-bottom and onshore evidence pointing to recurrent young offsets. Accordingly, a logic tree model for the Leech River – Devil’s Mountain fault system (LRF-DMF) incorporating various fault lengths, slip rates of 0.25 mm/yr with upper and lower alternatives of 0.15 and 0.35 mm/yr, and interactions between the faults was developed and added to Canada’s 6th Generation seismic hazard model. The LRF was given a 50% chance of being active. Although the slip rate is low for an active tectonic region, the fault system passes through greater Victoria, British Columbia, and contributes to the overall seismic hazard for southernmost Vancouver Island. We calculate the hazard in greater Victoria with and without the LRF-DMF in order to estimate its effect. The hazard in downtown Victoria is already high (coming mainly from in-slab sources at short periods and the Cascadia subduction zone at long periods) and decreases slowly northwards. The hazard increment due to the LRF-DMF is quite small, even very close to the fault, and as expected its contribution to the hazard decreases away from the fault so that in Sidney at ~25 km distance it is insignificant. The importance would have been very different in a lower hazard region, or if the slip rate on the LRF-DMF had been considerably higher.
Simple
Identification info
- Date (Creation)
- 2019-06
- Date (Publication)
- 2020-08-13T01:48:39
- Citation identifier
- ga-dataSetURI/http://pid.geoscience.gov.au/document/ga/127129
- Cited responsible party
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Role Organisation / Individual Name Details Author Halchuk, S.
Author Allen, T.
Author Adams, J.
Author Onur, T.
- Purpose
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12th Canadian Conference on Earthquake Engineering
- Status
- Final
- Spatial representation type
- Topic category
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- Geoscientific information
Extent
Extent
))
- Maintenance and update frequency
- As needed
Resource format
- Title
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Administration to complete
- Date
- Edition
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Administration to complete
- Distributor contact
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Role Organisation / Individual Name Details Distributor Geoscience Australia
Voice
Resource format
- Title
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Product data repository: Various Formats
- Website
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Data Store directory containing the digital product files
Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes
- theme.ANZRC Fields of Research.rdf
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EARTH SCIENCES
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- Theme
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seismic hazard
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- Theme
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faults
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- Place
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British Columbia
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- Keywords
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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
-
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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Download the article (pdf) [1 MB]
Download the article (pdf) [1 MB]
- Distribution format
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pdf
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Resource lineage
- Statement
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Collaboration with Canadian colleagues as part of the development of an updated Seismic Hazard Model for consideration by the Building Code of Canada
D2019-22003
- Hierarchy level
- Document
Metadata constraints
- Classification
- Unclassified
Metadata
- Metadata identifier
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urn:uuid/fba33f23-97a4-4b7f-a78e-bc1abc1fa533
- Title
-
GeoNetwork UUID
Type of resource
- Resource scope
- Document
Alternative metadata reference
- Title
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Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/127129
- Metadata linkage
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https://ecat.ga.gov.au:8080/geonetwork/srv/eng//metadata/add5bc51-dd4d-408c-8c1b-deebaacf6efe
- Metadata linkage
-
https://ecat.ga.gov.au/geonetwork/srv/eng//metadata/fba33f23-97a4-4b7f-a78e-bc1abc1fa533
- Date info (Creation)
- 2018-05-04T03:37:56
- Date info (Revision)
- 2018-05-04T03:38:12
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