Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL082780 |
Crustal Fault Connectivity of the M-w 7.8 2016 Kaikoura Earthquake Constrained by Aftershock Relocations | |
Lanza, F.1; Chamberlain, C. J.2; Jacobs, K.3; Warren-Smith, E.3; Godfrey, H. J.2,3; Kortink, M.2; Thurber, C. H.1; Savage, M. K.2; Townend, J.2; Roecker, S.4; Eberhart-Phillips, D.5 | |
2019-06-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:12页码:6487-6496 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; New Zealand |
英文摘要 | The 14 November 2016 M(w)7.8 Kaikura earthquake in the northern South Island, New Zealand, involved highly complex, multifault rupture. We combine data from a temporary network and the permanent national seismograph network to repick and relocate similar to 2,700 aftershocks of M >= 3 that occurred between 14 November 2016 and 13 May 2017. Automatic phase-picking is carried out using REST, a newly developed hybrid method whose pick quality is assessed by comparing automatic picks for a subset of 138 events with analysts' picks. Aftershock hypocenters computed from high-quality REST picks and a 3-D velocity model cluster almost exclusively in the shallow crust of the upper plate and reveal linkages at depth between surface-rupturing fault segments. Only eight aftershocks are relocated on a deeper structure positioned between patches of geodetically detected afterslip. This indicates that afterslip has not triggered significant earthquake activity on the subduction interface during the period of aftershock activity analyzed. Plain Language Summary Earthquake locations are fundamental for understanding the physics of earthquakes, defining the orientations and geometries of faults that have slipped seismically, and assisting in seismic hazard forecasting and assessment. We have mapped the locations of approximately 2,700 of the largest aftershocks that followed the 14 November 2016 M-w 7.8 Kaikura earthquake in the northern South Island, New Zealand. We achieve improvements in the precision and accuracy of the earthquakes' relocated hypocenters in two ways: (1) by using an expanded seismic network that incorporates data from more stations and (2) by applying a new automatic picking methodology that produces better seismic wave arrival time estimates. Our results show that most of the seismic energy released in the 6 months following the mainshock was generated in the uppermost 20 km of the crust, with the aftershocks' locations suggesting that separate faults mapped at the surface are in fact continuous at greater depth. Very little earthquake energy is associated with the subduction interface. |
英文关键词 | Kaikoura earthquake aftershock sequence relocation |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000477616300038 |
WOS关键词 | HIKURANGI SUBDUCTION ZONE ; NEW-ZEALAND ; SURFACE RUPTURE ; PLATE INTERFACE ; DEFORMATION ; REGION ; TSUNAMI ; TERMINATION ; CANTERBURY ; WELLINGTON |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/184237 |
专题 | 气候变化 |
作者单位 | 1.Univ Wisconsin Madison, Dept Geosci, Madison, WI 53706 USA; 2.Victoria Univ Wellington, Sch Geog Environm & Earth Sci, Wellington, New Zealand; 3.GNS Sci, Lower Hutt, New Zealand; 4.Rensselaer Polytech Inst, Earth & Environm Sci, Troy, NY USA; 5.GNS Sci, Dunedin, New Zealand |
推荐引用方式 GB/T 7714 | Lanza, F.,Chamberlain, C. J.,Jacobs, K.,et al. Crustal Fault Connectivity of the M-w 7.8 2016 Kaikoura Earthquake Constrained by Aftershock Relocations[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(12):6487-6496. |
APA | Lanza, F..,Chamberlain, C. J..,Jacobs, K..,Warren-Smith, E..,Godfrey, H. J..,...&Eberhart-Phillips, D..(2019).Crustal Fault Connectivity of the M-w 7.8 2016 Kaikoura Earthquake Constrained by Aftershock Relocations.GEOPHYSICAL RESEARCH LETTERS,46(12),6487-6496. |
MLA | Lanza, F.,et al."Crustal Fault Connectivity of the M-w 7.8 2016 Kaikoura Earthquake Constrained by Aftershock Relocations".GEOPHYSICAL RESEARCH LETTERS 46.12(2019):6487-6496. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论