汶川8.0级地震的根源和成因

汶川8.0级地震的主要根源是2005年1月20日出现的太阳宇宙线耀斑引起的宇宙线GLE事件。其成因是：宇宙线环境增强使作用到地球的大量宇宙线在电离层产生电流系,再通过电磁感应在地球内部产生感应电流系,进而在地内铀、钍元素富集区产生燃烧腔,进一步引起地下核裂变燃烧和地下氢聚变燃烧,燃烧腔里面的高温高压最终把燃烧腔的围岩炸裂,从而产生大地震。汶川大地震地区的地下观测资料及地震波层析成像分析证实在汶川大地震震源下确实存在异常高温区。据此,本文提出了预警大地震的一条新思路。     

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Impact of the Wenchuan Earthquake on tourism in Sichuan, China

An intensive earthquake, the Wenchuan Earthquake of 8.0 on the Richter scale, struck western Sichuan, China on May 12, 2008. The earthquake has tremendously affected all industries in the quake-hit areas, with no exception ：of the local tourism. The study of the effect of the earthquake on tourism enriches the theory of tourism, and more importantly, it well serves as the foundation for policy making. The objective of this study is to outline for readers the empirical findings on the various ways that the earthquake affected the operations and viability of tourism in the quake-hit areas. This paper is mainly divided into 3 parts. The first part is to discuss the importance of tourism in the quake-hit areas. The second is to analyze the influencing factors of tourism. The third is to assess the impact of the earthquake on tourism in Sichuan in different seasons.     

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龙门山断裂带地壳精细结构与汶川地震发震机理

利用2001年1月至2008年6月四川固定地震台网和临时地震台站记录到的大量P波到时资料,反演了龙门山断裂带及周边地区的地壳精细三维P波速度模型. 结果表明,汶川主震以北和以南地区的结构存在较大差异,以北地区的龙门山断裂带具有很强地壳不均匀性,这与该区发生了大量汶川地震的余震相一致. 这些结果有意义地改进了前人对龙门山断裂带仅为不同块体过渡带的认识. 汶川主震震源区下方存在有明显低波速异常体,表明流体可能存在于龙门山断裂带内. 这些流体可能直接影响汶川大震的形成. 本文的成像结果为下地壳流沿龙门山断裂带上浸提供了可靠的地震学证据.