Results 31 to 40 of about 10,489 (209)

Active faults in the epicentral and mesoseismal Ml 6.0 24, 2016 Amatrice earthquake region, central Italy. Methodological and seismotectonic issues

open access: yesAnnals of Geophysics, 2016
The August 24, 2016 Amatrice earthquake (Ml 6.0) struck a region of the central Apennines (Italy) where several active faults were known since decades, most of which are considered the surface expression of seismogenic sources potentially able to rupture
Emanuela Falcucci   +5 more
doaj   +1 more source

Focal Mechanism and Seismogenic Structure of the MS 5.1 Qingbaijiang Earthquake on February 3, 2020, Southwestern China

open access: yesFrontiers in Earth Science, 2021
The 3 February 2020 MS 5.1 Qingbaijiang earthquake, southwestern China, is the closest recorded MS ≥ 5.0 event to downtown Chengdu City to date, with an epicentral distance of only 38 km. Here we analyze seismic data from the Sichuan and Chengdu regional
Min Zhao   +5 more
doaj   +1 more source

Seismogenic structure behaviour revealed by spatial clustering of seismicity in the Umbria-Marche Region (Central Italy)

open access: yesAnnals of Geophysics, 1998
Time variations in the spatial distribution of earthquake epicentres are analyzed by application of the fractal correlation dimension method. The zone under investigation is located in Central Italy, bounded in longitude by 12.0 and 14.4 degrees east and
P. Tosi
doaj   +1 more source

2018年5月28日吉林松原MS5.7地震发震构造分析

open access: yesDizhen xuebao, 2020
利用黑龙江、吉林、内蒙古三省数字地震台网的三分量宽频带波形资料对2018年5月28日吉林省松原市宁江区发生的MS5.7地震进行了全波形矩张量反演,获取了此次地震的震源机制解和矩心位置;并使用震源-矩心方法讨论了该地震的发震断层。研究结果显示:松原MS5.7地震的矩震级为MW5.2,矩心位置为(45.225°N,124.685°E),矩心深度为7 km。震源机制解参数显示:该地震为走滑型;节面Ⅰ的走向、倾角和滑动角分别为217°,82°和164°;节面Ⅱ的走向、倾角和滑动角分别为309°,74°和8 ...
Yongsheng Li   +4 more
doaj   +1 more source

Deep Blind Fault Activity—A Fault Model of Strong Mw 5.5 Earthquake Seismogenic Structures in North China

open access: yesRemote Sensing
North China is one of the high-risk areas for destructive and strong earthquakes in mainland China and has experienced numerous strong historical earthquakes.
Guanshen Liu   +6 more
doaj   +1 more source

新疆博罗可努—阿齐克库都克断裂精河段古地震与最新活动时代研究

open access: yesDizhen xuebao, 2022
博罗可努—阿齐克库都克断裂是西天山北西向右旋走滑断裂系中最北端的一条活动断裂,其在中国境内延伸最长。本文在艾比湖西侧及精河县东南侧最新地表形变上开挖两条探槽,进行该断裂古地震的初步研究。根据活动性质差异和断裂截切关系将该断裂分为艾比湖段和精河以东段,在对沉积物光释光年代和地震关系分析的基础上,确定了此两段断裂的最新活动时代均为全新世,初步确定其古地震期次,最新地震事件距今3.7—4.86 ka之间;根据冲沟位错和洪积扇年代测定结果,确定精河以东段的活动速率大于4 mm/a;根据探槽错动至地表 ...
Panxin Yang   +7 more
doaj   +1 more source

Seismic structure of western end of the Nankai trough seismogenic zone [PDF]

open access: yesJournal of Geophysical Research: Solid Earth, 2002
In 1998 a seismic experiment along a 320‐km‐long profile using an air gun array and ocean bottom seismographs (OBSs) was collected in the on shore‐offshore, forearc region of the western Nankai trough seismogenic zone, southwestern Japan. This area is outside the coseismic rupture area of the 1946 Nankaido earthquake (Ms = 8.2).
Narumi Takahashi   +10 more
openaire   +1 more source

2013年三台MS4.7地震震源机制及发震构造研究

open access: yesDizhen xuebao, 2021
2013年2月19日四川省绵阳市三台县发生MS4.7地震,震中位于四川盆地中部基底断裂绵阳—三台—大足断裂与蒲江—三台—巴中断裂的交会区域。基于地震目录、震相报告和波形等资料,对地震序列进行重定位,采用近远震联合波形反演求解主震震源机制,结合野外地质调查对该地震的发震构造进行分析。余震序列重定位的空间展布方向为NW-SE向,与节面Ⅰ走向吻合,认为此次地震发震断裂走向为NW−SE,倾向为NE,且破裂面近于直立,发震断层在近NS向的近水平挤压应力作用下作右旋走滑错动。实地调查中未见地表破裂及地表断层行迹 ...
Suihai Liu   +4 more
doaj   +1 more source

High precision earthquake locations reveal seismogenic structure beneath Mammoth Mountain, California [PDF]

open access: yesGeophysical Research Letters, 2003
In 1989, an unusual earthquake swarm occurred beneath Mammoth Mountain that was probably associated with magmatic intrusion. To improve our understanding of this swarm, we relocated Mammoth Mountain earthquakes using a double difference algorithm. Relocated hypocenters reveal that most earthquakes occurred on two structures, a near‐vertical plane at 7 ...
Prejean, Stephanie   +4 more
openaire   +1 more source

Interseismic coupling and seismic potential along the Central Andes subduction zone [PDF]

open access: yes, 2011
We use about two decades of geodetic measurements to characterize interseismic strain build up along the Central Andes subduction zone from Lima, Peru, to Antofagasta, Chile.
Aktug   +380 more
core   +5 more sources

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