期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
2014年盈江双震的破裂历史 被引量:8
1
作者 许力生 严川 +3 位作者 张旭 付虹 李春来 郭祥云 《地球物理学报》 SCIE EI CAS CSCD 北大核心 2014年第10期3270-3284,共15页
2014年5月24日在云南省盈江县发生Ms5.6级地震(主震A),于5月30日在其附近再次发生Ms6.1级地震(主震B).我们挑选云南省地震台网记录的数字波形资料,借助于经验格林函数技术提取了这两次地震的震源时间函数,获得了其破裂历史.为了利... 2014年5月24日在云南省盈江县发生Ms5.6级地震(主震A),于5月30日在其附近再次发生Ms6.1级地震(主震B).我们挑选云南省地震台网记录的数字波形资料,借助于经验格林函数技术提取了这两次地震的震源时间函数,获得了其破裂历史.为了利用经验格林函数技术提取震源时间函数,我们首先利用优选的速度模型,采用逆时成像技术重新确定了主震A和B以及挑选的6次较大余震的震源位置,并利用双差定位技术确定了主震与余震之间的相对位置;然后利用广义极性振幅技术反演了这些事件的震源机制;最后,根据主震和余震的相对位置以及震源机制特征挑选最优台站记录,提取了两个主震的震源时间函数.结果表明,主震A持续时间约3.5s,分两个阶段,第一阶段0-1.3s,第二阶段1.3-3.5s;主震B持续时间约5.0s,其过程比A复杂,至少可以分为五个阶段,第一阶段0-0.7s,第二阶段0.7-1.6s,第三阶段1.6-2.5s,第四阶段2.5-3.8s,第五阶段3.8-5.0s. 展开更多
关键词 盈江双震 震源位置 震源机制 破裂历史
下载PDF
历史大地震破裂区地震危险性的地震活动性定量分析——以南北地震带中北段为例 被引量:3
2
作者 龙锋 蒋长胜 +1 位作者 冯建刚 唐兰兰 《地震》 CSCD 北大核心 2012年第3期98-108,共11页
尽管地震空区理论在中长期地震预测中起着重要的作用,但大地震复发在时间上的丛集或非线性行为使得在中长期地震预测研究中依然需要同时考虑非地震空区的、历史地震破裂区的潜在大地震危险性。为了探索能基于观测资料分析的、鉴别历史... 尽管地震空区理论在中长期地震预测中起着重要的作用,但大地震复发在时间上的丛集或非线性行为使得在中长期地震预测研究中依然需要同时考虑非地震空区的、历史地震破裂区的潜在大地震危险性。为了探索能基于观测资料分析的、鉴别历史地震破裂区(包括历史、史前地震破裂的地震空区)大地震复发危险性的技术方法,在南北地震带中北段挑选出8个具有不同离逝时间的历史大地震破裂区,分析这些破裂区现代地震活动性的量化特征,以初步探索判定潜在大地震危险性紧迫程度的地震活动性方法。结果表明,反映地震序列衰减状态的p值和反映地震活动率的a值与这些历史破裂区最晚大地震的离逝时间有较好的对应关系,但也有部分破裂区可能由于复杂的断层结构与运动性质,对应关系并不明确;反映构造应力积累状况的b值则难于反映离逝时间演化阶段的信息。b值的时间扫描结果显示,大部分历史破裂区的b值随时间演化平稳,但1879年甘肃武都8级地震破裂区的b值则表现为明显的涨落,并存在持续20年的降低趋势。对比分析认为,1933年四川茂县7.5级、1976年四川松潘—平武两次7.2级地震破裂区目前仍处于序列衰减期,不具备再次发生7级以上地震的背景;公元842年迭部7级地震破裂区北缘低b值的玛曲段比迭部段更具危险性;1879年武都8级地震破裂区的b值持续降低也可能反映该区处于新的一轮孕震期。 展开更多
关键词 历史破裂 大地震危险性 地震活动性 南北地震带中北段
下载PDF
"Some Things Must Be Left Unsaid!" On How Macherey Is Dialogically Engaged with Post-Marxism1 被引量:1
3
作者 Billy Bin Feng Huang 《Journal of Literature and Art Studies》 2018年第3期487-508,共22页
This paper aims to examine how Macherey is dialogically engaged with post-Marxism in formulating his reading strategy. First Macherey thinks that the author must have left something unsaid in his text. The unsaid or t... This paper aims to examine how Macherey is dialogically engaged with post-Marxism in formulating his reading strategy. First Macherey thinks that the author must have left something unsaid in his text. The unsaid or the narrative rupture is responsible for the multiplicity of the voices in the text, enabling the text to exist. Most of all, Macherey argues that a text, embedded in History, is where the author represents ideology inaccurately. And it is from this inaccuracy where the narrative rupture emerges. At this point, Macherey is dialogically correlated with several major post-Marxists, such as Althusser, Eagleton, and Jameson. First, all three of them give their own definitions to ideology, and they all define the relationship between the text, ideology, and History in a similar fashion. For Althusser, ideology is men's imaginary relation to History and is insufficiently reflected in the text, which perfectly corresponds to Macherey's claim. For Eagleton, a text absorbs ideology and puts it into contradiction, establishing its relationship with History. As Eagleton himself has stated, his so-called "ideological contradiction" is tantamount to Macherey's so-called "narrative rupture." In Jameson's opinion, ideology is designed to repress social contradictions, and a text, a symbolic act, is supposed to offer imaginary solutions to them. Above all, they end up as the latent meanings of a text. As for History, it is the inaccessible Real. In speaking of "the latent meanings of a text," Jameson literally echoes Machery's said/unsaid model. Thus, we can confirm how Macherey is dialogically engaged with post-Marxism. 展开更多
关键词 Macherey (un)said narrative rupture post-Marxism ALTHUSSER EAGLETON JAMESON
下载PDF
Discovery of the Surface Rupture Zone on the South of Helishan in Gaotai,Gansu Province 被引量:1
4
作者 Zheng Wenjun Zhang Peizhen +2 位作者 Yuan Daoyang Ge Weipeng Liu Jianhui 《Earthquake Research in China》 2010年第1期97-105,共9页
According to a new investigation in the northern Hexi corridor,the remains of two surface rupture zones were discovered on the southern margin fault of the Helishan. One rupture has a length of approximately 7km and t... According to a new investigation in the northern Hexi corridor,the remains of two surface rupture zones were discovered on the southern margin fault of the Helishan. One rupture has a length of approximately 7km and the other 10km. The two surface rupture zones might have been produced by the latest earthquake event. On the surface rupture is continuous scarp and free face caused by the rupture. The scarp is about 1 ~ 1. 5m high and on some sites,nearly up to 2m. According to the OSL results,the latest T1 terrace and higher flood plain forming in 3000a B. P. are dislocated by the fault. The above reveals the rupture age to be later than the T1 terrace. However,in the historical data and earthquake catalogue,we didn't find related information about the fault and surface rupture in this area. The 180 A. D. Biaoshi M8. 0 earthquake and the 756 A. D. Zhangye-Jiuquan M7. 0 earthquake are documented in historical data. It is inferred by textual research that the two earthquakes are related to the northern marginal fault of Yumushan in the south of the basin. Due to a lack of reliable evidence,there are still many arguments on this inferred conclusion. Thus we hold that the two surface rupture zones were produced by one of the two large earthquakes or other unrecorded historical event. The research on the activity and surface rupture of this fault can offer valuable information for the tectonic study and strong earthquake risk estimates of this region in the future. 展开更多
关键词 Surface rupture The Helishan southern margin fault The northern Tibet Gaotai Gansu
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部