The New Zealand Paleoseismic Site Database, Version 1.0

IF 2.6 3区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS Seismological Research Letters Pub Date : 2023-09-25 DOI:10.1785/0220230150
Nicola J. Litchfield, Jade Humphrey, Regine Morgenstern, Robert M. Langridge, Genevieve L. Coffey, Russ J. Van Dissen
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引用次数: 3

Abstract

Abstract 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 The NZ PSDB v.1.0 contains both published and unpublished data, and many sites were relocated using high-resolution basemaps.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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新西兰古地震站点数据库,1.0版
特定地点的古地震数据是地震灾害模型中断层大地震(Mw ~ 7+)参数化的关键数据集。针对新西兰国家地震灾害模型2022修订项目(NZ NSHM 2022),开发了一个新的数据库,即新西兰古地震现场数据库(NZ PSDB),该数据库包含地壳(上板块)活动断层的古地震(滑动率、地震时间、复发间隔[RI]和单事件位移[SED])数据。第一版1.0 (v.1.0)以支撑第三次统一加利福尼亚地震破裂预报(UCERF3)的数据集为模型,建立并显著改进了以前的新西兰汇编。关键的改进包括这些参数的数据文档,例如偏移量测量和滑移率的年龄,以及关键属性的质量排名分配。NZ PSDB v.1.0包含2811条记录,细分为滑动率(871)、地震时序(953)和SED (987);地震时序数据集还包括320个最后事件和98个RI记录。由于时间限制,大部分精力都花在了编制滑动率记录上,按照从高到低的优先顺序,而在SED数据集上花费的时间最少,优先考虑历史地震的记录。该汇编还旨在获得尽可能多的地理分布,但记录仅位于NZ社区故障模型v.1.0中相对较少的故障和故障部分(最多24%)。最显著的空间差距在近海和南岛南部和西部。NZ PSDB v.1.0包含已发布和未发布的数据,许多站点使用高分辨率底图进行了重新定位。然而,放射性碳年龄没有使用一致的校准曲线重新校准。开发一种有效地重新校准放射性碳年龄的过程,以及填补关键数据空白,是v2.0当前工作的重点。
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来源期刊
Seismological Research Letters
Seismological Research Letters 地学-地球化学与地球物理
CiteScore
6.60
自引率
12.10%
发文量
239
审稿时长
3 months
期刊介绍: Information not localized
期刊最新文献
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