GSTDTAP  > 气候变化
DOI10.1002/2018GL077385
Triggered Slow Slip and Afterslip on the Southern Hikurangi Subduction Zone Following the Kaikura Earthquake
Wallace, Laura M.1; 39;Anastasio, Elisabetta2
2018-05-28
发表期刊GEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
EISSN1944-8007
出版年2018
卷号45期号:10页码:4710-4718
文章类型Article
语种英语
国家New Zealand; USA
英文摘要

The 2016 M(W)7.8 Kaikura earthquake ruptured a complex sequence of strike-slip and reverse faults in New Zealand's northeastern South Island. In the months following the earthquake, time-dependent inversions of Global Positioning System and interferometric synthetic aperture radar data reveal up to 0.5m of afterslip on the subduction interface beneath the northern South Island underlying the crustal faults that ruptured in the earthquake. This is clear evidence that the far southern end of the Hikurangi subduction zone accommodates plate motion. The M(W)7.8 earthquake also triggered widespread slow slip over much of the subduction zone beneath the North Island. The triggered slow slip included immediate triggering of shallow (<15km), short (2-3weeks) slow slip events along much of the east coast, and deep (>30km), long-term (>1year) slow slip beneath the southern North Island. The southern Hikurangi slow slip was likely triggered by large (0.5-1.0MPa) static Coulomb stress increases.


Plain Language Summary The 2016M(W)7.8 Kaikura earthquake ruptured a complex web of faults in New Zealand's northeastern South Island. In the months following the earthquake, Global Positioning System and satellite radar data reveal a few to tens of centimeters of rapid motion of the northern South Island and much of the eastern North Island, up to 600 km away from the earthquake. We interpret these displacements to involve up to half a meter of movement on the boundary where the Pacific Plate dives down (or subducts) beneath the northern South Island. The Kaikura earthquake also triggered widespread slow slip events over much of the subduction zone beneath the North Island. Slow slip events are similar to earthquakes, as they involve rapid movement along plate boundary faults. However, unlike earthquakes that take seconds to occur, slow slip events take months to occur. This is arguably the clearest example ever of widespread, large-scale triggering of slow slip events on a plate boundary up to a several hundreds of kilometers away from the earthquake that triggered them.


领域气候变化
收录类别SCI-E
WOS记录号WOS:000435262000021
WOS关键词2016 KAIKOURA EARTHQUAKE ; NEW-ZEALAND EARTHQUAKE ; PLATE BOUNDARY ; DEFORMATION ; RUPTURE ; FAULT ; MARLBOROUGH ; INTERFACE ; THRUST ; MODELS
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/27067
专题气候变化
作者单位1.GNS Sci, Lower Hutt, New Zealand;
2.Univ Texas Austin, Inst Geophys, 8701 Mopac Blvd, Austin, TX 78712 USA;
3.Univ Otago, Surveying Sch, Dunedin, New Zealand
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GB/T 7714
Wallace, Laura M.,39;Anastasio, Elisabetta. Triggered Slow Slip and Afterslip on the Southern Hikurangi Subduction Zone Following the Kaikura Earthquake[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(10):4710-4718.
APA Wallace, Laura M.,&39;Anastasio, Elisabetta.(2018).Triggered Slow Slip and Afterslip on the Southern Hikurangi Subduction Zone Following the Kaikura Earthquake.GEOPHYSICAL RESEARCH LETTERS,45(10),4710-4718.
MLA Wallace, Laura M.,et al."Triggered Slow Slip and Afterslip on the Southern Hikurangi Subduction Zone Following the Kaikura Earthquake".GEOPHYSICAL RESEARCH LETTERS 45.10(2018):4710-4718.
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