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The Shumagin seismic gap structure and associated tsunami hazards, Alaska convergent margin

Abstract:
The potential for a major earthquake in the Shumagin seismic gap, and the tsunami it could generate, was reported in 1971. However, while potentially tsunamigenic splay faults in the adjacent Unimak and Semidi earthquake segments are known, such features along the Shumagin segment were undocumented until recently. To investigate margin structure and search for splay faults, we reprocessed six legacy seismic records and also processed seismic data acquired by RV Langseth during the ALEUT project (cf. Bécel et al., 2017). All records show splay faults separating the frontal prism from the margin framework. A ridge uplifted by the splay fault hanging wall extends along the entire segment. At the plate interface, the splay fault cuts across subducted sediment strata in some images, whereas in others, the plate interface sediment cuts across the fault. Splay fault zones are commonly associated with subducting lower-plate relief. Along the upper slope, beneath a sediment cover, major normal faults dipping landward and seaward border a ridge of basement rock. The faults displace a regional unconformity that elsewhere received Oligocene–Miocene sediment. Low seafloor scarps above some normal faults indicate recent tectonism. The buried ridge is a continuation of the Unimak Ridge structure that extends NE of the Unimak/Shumagin segment boundary. Some geological characteristics of the Shumagin segment differ from those of other Alaskan earthquake segments, but a causal link to the proposed Shumagin creeping seismic behavior is equivocal.
Author Listing: Roland von Huene;John J. Miller;Anne Krabbenhoeft
Volume: 15
Pages: 324-341
DOI: 10.1130/GES01657.1
Language: English
Journal: Geosphere

Geosphere

GEOSPHERE

影响因子:1.7
是否综述期刊:否
是否OA:是
是否预警:不在预警名单内
发行时间:-
ISSN:1553-040X
发刊频率:Bimonthly
收录数据库:SCIE/Scopus收录/DOAJ开放期刊
出版国家/地区:UNITED STATES
出版社:Geological Society of America

期刊介绍

Geosphere is GSA's ambitious, online-only publication that addresses the growing need for timely publication of research results, data, software, and educational developments in ways that cannot be addressed by traditional formats. The journal's rigorously peer-reviewed, high-quality research papers target an international audience in all geoscience fields. Its innovative format encourages extensive use of color, animations, interactivity, and oversize figures (maps, cross sections, etc.), and provides easy access to resources such as GIS databases, data archives, and modeling results. Geosphere's broad scope and variety of contributions is a refreshing addition to traditional journals.

Geosphere是GSA雄心勃勃的纯在线出版物,旨在以传统格式无法满足的方式满足对及时发布研究成果、数据、软件和教育发展的日益增长的需求。该杂志的严格同行评审,高质量的研究论文,目标是在所有地球科学领域的国际读者。其创新的格式鼓励广泛使用颜色、动画、交互性和超大图形(地图、横截面等),并提供对诸如GIS数据库、数据存档和建模结果等资源的轻松访问。Geosphere的广泛范围和各种各样的贡献是一个令人耳目一新的除了传统的期刊。

年发文量 95
国人发稿量 11
国人发文占比 11.58%
自引率 11.8%
平均录取率 较易
平均审稿周期 较慢,6-12周
版面费 $2,750 USD
偏重研究方向 地学-地球科学综合
期刊官网 http://geosphere.geoscienceworld.org/
投稿链接 http://www.editorialmanager.com/geosphere/default.aspx

质量指标占比

研究类文章占比 OA被引用占比 撤稿占比 出版后修正文章占比
100.00% 81.09% 0.00% 4.23%

相关指数

影响因子
影响因子
年发文量
自引率
Cite Score

预警情况

时间 预警情况
2024年02月发布的2024版 不在预警名单中
2023年01月发布的2023版 不在预警名单中
2021年12月发布的2021版 不在预警名单中
2020年12月发布的2020版 不在预警名单中

JCR分区 WOS分区等级:Q3区

版本 按学科 分区
WOS期刊SCI分区
(2021-2022年最新版)
GEOSCIENCES, MULTIDISCIPLINARY Q3

中科院分区

版本 大类学科 小类学科 Top期刊 综述期刊
地球科学
2区
GEOSCIENCES, MULTIDISCIPLINARY
地球科学:综合
3区
2021年12月
基础版
地学
3区
GEOSCIENCES, MULTIDISCIPLINARY
地球科学综合
3区
2021年12月
升级版
地球科学
2区
GEOSCIENCES, MULTIDISCIPLINARY
地球科学综合
3区
2020年12月
旧的升级版
地球科学
3区
GEOSCIENCES, MULTIDISCIPLINARY
地球科学综合
3区
2022年12月
最新升级版
地球科学
3区
GEOSCIENCES, MULTIDISCIPLINARY
地球科学:综合
4区