Paleoseismology of the Hyde Fault, Otago, New Zealand

Griffin, Jonathan; Stirling, Mark; Barrell, David; Berg, Ella J. van den; Todd, Erin; Nicolls, Ross; Ning-sheng, Wang

doi:10.1080/00288306.2021.1995007

Cited by 4 publications

(17 citation statements)

References 36 publications

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“…Based on the vertical displacement results presented above, we therefore estimate a long‐term average slip rate of 0.24 mm/yr (0.19–0.29 mm/yr at 95% confidence) and a horizontal shortening rate of 0.14 mm/yr (0.12–0.16 mm/yr). Our slip rate estimate at the Rock Creek site is within the range of the slip rate estimated from fault displacement observations and OSL dating in the Lug Creek trench 10 km to the north‐east (0.15–0.3 mm/yr; Griffin et al., 2021).…”

Section: Resultssupporting

confidence: 79%

“…The CRN ages from surfaces T1 and T2 therefore tie in with the OSL ages for the two most recent paleoearthquakes in the two trenches, giving us confidence that samples at this site are not significantly affected by inheritance. In addition, the 34.2 ka age from T2, taken on a surface only faulted by the two most recent events, provides an additional minimum age constraint for the ante‐penultimate event recorded in the Lug Creek trench (Griffin et al., 2021).…”

Section: Resultsmentioning

confidence: 99%

“…The paleoearthquake records for the Hyde (Griffin et al., 2021) and Dunstan (Van Dissen et al., 2007) faults are shown in Tables 5 and 6, respectively. Van Dissen et al.…”

Section: Discussionmentioning

confidence: 99%

“…The paleoearthquake records for the Hyde (Griffin et al, 2021) and Dunstan (Van Dissen et al, 2007) faults are shown in Tables 5 and 6, respectively. Van Dissen et al (2007) reported event ages in terms of the uncertainty distributions for OSL ages that pre-and post-date each event, rather than age distributions for the events themselves.…”

Section: Integration With the Paleoearthquake Recordmentioning

confidence: 99%

“…We investigate whether the two faults demonstrate variability in long‐term slip rate consistent with a hypothesis of episodic fault activity (Beanland & Berryman, 1989). We integrate the slip rate record with previously published paleoearthquake records for these faults (Griffin et al., 2021; Van Dissen et al., 2007), allowing inference to be made regarding whether the observed paleoearthquake record is consistent with average earthquake rates, or whether it instead encompasses periods of unusually high or low earthquake rates.…”

Section: Introductionmentioning

confidence: 99%

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Late Quaternary Slip Rates for the Hyde and Dunstan Faults, Southern New Zealand: Implications for Strain Migration in a Slowly Deforming Continental Plate Margin

et al. 2022

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Reverse faulting in Otago, southern New Zealand, accommodates distributed tectonic convergence on the eastern side of the Australian‐Pacific plate boundary. Paleoearthquake records from some of the faults in the region show highly variable earthquake recurrence times, with long periods of quiescence separated by periods of earthquake activity. Here we develop a longer‐term context for these records, using cosmogenic radionuclide dating of faulted alluvial fan surfaces to characterize the late Quaternary slip rates on two significant faults within the system, the Hyde and Dunstan faults. We determine an average slip rate of 0.24 mm/yr (0.19–0.29 mm/yr at 95% confidence) for the Hyde Fault since about 115 ka, and an average slip rate of 0.16 mm/yr (0.12–0.21 mm/yr) for the Dunstan Fault since about 320 ka. Both faults show increases in slip rate of a factor of three to five times the average long‐term rate over timescales of 10 kyr. Increases in slip rate are out of phase on the two faults, supporting a hypothesis that strain is shared within the fault system over timescales on the order of 10 kyr. Over longer timescales, on the order of 100 kyr, slip rates can be well‐approximated by a linear fit, providing an upper limit on the variability of fault slip rates with time.

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Section: Resultssupporting

confidence: 79%

Section: Resultsmentioning

confidence: 99%

“…The paleoearthquake records for the Hyde (Griffin et al., 2021) and Dunstan (Van Dissen et al., 2007) faults are shown in Tables 5 and 6, respectively. Van Dissen et al.…”

Section: Discussionmentioning

confidence: 99%

Section: Integration With the Paleoearthquake Recordmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Late Quaternary Slip Rates for the Hyde and Dunstan Faults, Southern New Zealand: Implications for Strain Migration in a Slowly Deforming Continental Plate Margin

et al. 2022

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Late Quaternary activity of the NW Cardrona Fault, Otago, New Zealand

van den Berg,

Williams,

Stirling

et al. 2024

New Zealand Journal of Geology and Geophysics

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The New Zealand Paleoseismic Site Database, Version 1.0

Litchfield,

Humphrey,

Morgenstern

et al. 2023

Seismological Research Letters

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Site-specific paleoseismic data are key datasets underpinning the parameterization of large (Mw∼7+) earthquakes on faults in seismic hazard models. For the New Zealand National Seismic Hazard Model 2022 Revision Project (NZ NSHM 2022), a new database, the NZ Paleoseismic Site Database (NZ PSDB), was developed that contains paleoseismic (slip rate, earthquake timings, recurrence interval [RI], and single-event displacement [SED]) data for crustal (upper plate) active faults. The first edition version 1.0 (v.1.0) was modeled on datasets underpinning the Third Uniform California Earthquake Rupture Forecast (UCERF3) and builds on and significantly improves previous NZ compilations. Key improvements include documentation of the data underlying these parameters, such as offset measurements and ages for slip rate, and assignment of quality rankings for key attributes. The NZ PSDB v.1.0 contains 2811 records, subdivided into slip rate (871), earthquake timings (953), and SED (987); the earthquake timings dataset also includes 320 last event and 98 RI records. Because of time constraints, the most effort went into compiling the slip-rate records, in priority from highest to lowest slip rates, and the least amount of time was spent on the SED dataset, prioritizing records from historical earthquakes. The compilation also aimed to obtain as much geographical spread as possible, but the records only lie on a relatively small (maximum, 24%) number of faults and fault sections in the NZ Community Fault Model v.1.0. The most significant spatial gaps are offshore and in the southern and western South Island. The NZ PSDB v.1.0 contains both published and unpublished data, and many sites were relocated using high-resolution basemaps. However, radiocarbon ages were not recalibrated using a consistent calibration curve. Developing a process to efficiently recalibrate radiocarbon ages, as well as filling key data gaps, are current focuses of work toward v.2.0.

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Paleoseismology of the Hyde Fault, Otago, New Zealand

Cited by 4 publications

References 36 publications

Late Quaternary Slip Rates for the Hyde and Dunstan Faults, Southern New Zealand: Implications for Strain Migration in a Slowly Deforming Continental Plate Margin

Late Quaternary Slip Rates for the Hyde and Dunstan Faults, Southern New Zealand: Implications for Strain Migration in a Slowly Deforming Continental Plate Margin

Late Quaternary activity of the NW Cardrona Fault, Otago, New Zealand

The New Zealand Paleoseismic Site Database, Version 1.0

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