DOI: 10.1002/2015GL064167
论文题名: Shorter intervals between great earthquakes near Sendai: Scour ponds and a sand layer attributable to A.D. 1454 overwash
作者: Sawai Y. ; Namegaya Y. ; Tamura T. ; Nakashima R. ; Tanigawa K.
刊名: Geophysical Research Letters
ISSN: 0094-8647
EISSN: 1944-8378
出版年: 2015
卷: 42, 期: 12 起始页码: 4795
结束页码: 4800
语种: 英语
英文关键词: Japan Trench
; recurrence intervals
; scour pond
; tsunami deposit
; tsunami simulation
Scopus关键词: Beaches
; Deposits
; Lakes
; Maps
; Sand
; Stratigraphy
; Tsunamis
; Beach ridge
; Great earthquake
; Moment magnitudes
; Radiocarbon age
; Recurrence intervals
; Topographic map
; Tsunami deposits
; Tsunami simulation
; Earthquakes
; beach ridge
; diatom
; earthquake magnitude
; pond
; radiocarbon dating
; recurrence interval
; sand
; scour
; spatiotemporal analysis
; topographic mapping
; tsunami event
; Honshu
; Japan
; Japan Trench
; Miyagi
; Pacific Ocean
; Sendai
; Tohoku
; Bacillariophyta
英文摘要: A sparsely documented tsunami in 1454 may subdivide the recurrence interval between the 869 and 2011 tsunamis near Sendai, as judged from geomorphic, stratigraphic, and archival evidence. Pond-filled breaches cut across beach ridges on century-old topographic maps. The basal pond deposit in one of these breaches postdates 1454. Stratigraphy on Sendai Plain includes a sand sheet that contains marine and brackish diatoms. Radiocarbon ages suggest that the sheet dates to 1406-1615 (2σ), and written records for this interval in Tohoku mention a tsunami in 1454. The inferred inundation extended 1.0-2.5 km inland from an approximate medieval shoreline. Simulated tsunamis that best account for the sand sheet require a thrust earthquake of moment magnitude 8.4 or larger. If the sand sheet represents the 1454 tsunami, the two most recent intervals between great thrust earthquakes in Sendai region spanned 585 and 557 years. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84948715010&doi=10.1002%2f2015GL064167&partnerID=40&md5=1a790b8c9aff2dffbbbc9daec6521f44
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8263
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
Recommended Citation:
Sawai Y.,Namegaya Y.,Tamura T.,et al. Shorter intervals between great earthquakes near Sendai: Scour ponds and a sand layer attributable to A.D. 1454 overwash[J]. Geophysical Research Letters,2015-01-01,42(12).