汶川MS8.0地震前地表潜热通量异常

地震 ›› 2010, Vol. 30 ›› Issue (3): 64-71.

汶川M_S8.0地震前地表潜热通量异常

李美¹, 康春丽¹, 李志雄², 荆凤³, 薛艳¹, 闫伟¹

1.中国地震台网中心, 北京 100045;
2.海南省地震局, 海口 570203;
3.中国地震局地震预测研究所, 北京 100036

收稿日期:2009-10-16 修回日期:2010-01-19 发布日期:2021-10-18
作者简介:李美(1975-), 女, 山东沂南人, 硕士, 助理研究员, 主要从事地震电磁学等研究。
基金资助:
国家科技支撑计划(2008BAC35B03-05)

Abnormal Surface Latent Heat Flux Prior to the Wenchuan M_S8.0 Earthquake

LI Mei¹, Kang Chun-li¹, LI Zhi-xiong², JING Feng³, XUE Yan¹, Yan Wei¹

1. China Earthquake Networks Center, Beijing 100045, China;
2. Earthquake Administration of Hainan Province, Haikou 570203, China;
3. Institute of Earthquake Science, CEA, Beijing 100036, China

Received:2009-10-16 Revised:2010-01-19 Published:2021-10-18

摘要/Abstract

摘要： 本文处理了汶川M_S8.0大地震前后部分地表潜热通量(SLHF)数据, 发现SLHF异常信息出现在地震前7天。SLHF异常时间上经历弱—强—弱变化过程, 地震发生在强异常时段, 异常两个高值点出现在活动断层较为发育的应力低值区, 地震发生后, 异常信息很快衰减。SLHF异常随时间有沿发震断裂带走向运移的规律。震前7天的综合SLHF异常主要分布在龙门山断裂带及周围地区, 震中位于异常区的中心位置。

关键词: 地表潜热通量, 汶川8.0级地震, 地表潜热通量异常, 时空分布特征

Abstract: In this paper, surface latent heat flux (SLHF) data is processed and analyzed before the Wenchuan M_S8.0 earthquake. According to the results, SLHF abnormity appears in local area 7 days before the earthquake. The abnormity information shows weak initially and then becomes strong gradually and becomes weak eventually. SLHF abnormity is very strong when the main earthquake takes place. There are two high SLHF value points which appear in relative low stress area with developed active faults. SLHF abnormity becomes weak quickly after the main shock. SLHF abnormity area migrates with time along main focus faults. 7 days′ synthetic SLHF abnormity area covers around Longmenshan Faults and the epicenter of the main shock locates in the center of the abnormity area.

Key words: Surface Latent Heat Flux, Wenchuan M_S8.0 earthquake, SLHF abnormity, Spatial and temporal distribution

中图分类号:

P315.7

李美, 康春丽, 李志雄, 荆凤, 薛艳, 闫伟. 汶川M_S8.0地震前地表潜热通量异常[J]. 地震, 2010, 30(3): 64-71.

LI Mei, Kang Chun-li, LI Zhi-xiong, JING Feng, XUE Yan, Yan Wei. Abnormal Surface Latent Heat Flux Prior to the Wenchuan M_S8.0 Earthquake[J]. EARTHQUAKE, 2010, 30(3): 64-71.

参考文献

[1] 李金平, 吴立新, 温志勇, 等. 沿海和内陆强震前地表潜热通量异常特征[J]. 科技导报, 2008, 26(5): 40-45.
[2] Dey S, Singh R. Surface Latent Heat Flux as an earthquake precursor[J]. Natural Hazards and Earth System Science, 2003, (3): 749-755.
[3] Cervone G, Panait L, Singh R, et al. An Application of Evolutionary Algorithm to Predict the Extent of SLHF Anomaly Associated with Coastal Earthquakes[J]. Proceedings of GECCO-2004, Genetic and Evolutionary Computation Conference, Seattle, WA, June 26-30, 2004.
[4] Cervone G, Gautam R, Singh R, et al. Association of Surface Latent Heat Flux with Hurricane Isabel[J]. COSPAR-2004, Committee on Space Research, Paris, France, July 18-25, 2004.
[5] Singh P, Cervone G, Singh P V, et al. Generic precursors to coastal earthquakes: Inferences from Denali fault earthquake[J]. Tectonophysics, 2007, (431): 231-240.
[6] 陈梅花, 邓志辉, 杨竹转, 等. 2004年印度尼西亚9级大地震前的潜热通量异常[J]. 科学通报, 2006, 51(1): 118-120.
[7] 中国地震局. 2008年汶川8.0级地震科学总结与反思报告[C]. 2009. 125-130.
[8] 汶川8.0级地震前后原地应力重复测量研究成果[C]. http://www.cea.gov.cn/.
[9] Bina C R. A note on latent heat release from disequilibrium phase transformations and deep seismogenesis[J]. Earth Planets Space, 1998, (50): 1029-1034.
[10] Tronin A A, Hayakawa M, Molchanov O A.Thermal IR satellite data for earthquake research in Japan and China[J]. J Geodyn, 2002, (33): 519-534.
[11] 丁鉴海, 卢振业, 黄雪香. 地震地磁学[M]. 北京: 地震出版社, 1994, p262.
[12] 戴华光, 陈永明, 苏向洲, 等. 天桥沟—黄羊川活动断裂带的几何学和运动学特征[J]. 西北地震学报, 1999, 21(3): 259-267.
[13] 牛安福, 张凌空, 闫伟, 等. 汶川地震前南北地震带中北段地形变变化特征的研究[J]. 地震, 2009, 29(1): 100-107.
[14] 高孟潭, 陈学良, 俞言祥, 等. “5·12”汶川8.0 级地震汉源烈度异常机理的初步探讨[J]. 震灾防御技术, 2008, 3(3): 216-223.
[15] 唐文清, 陈智梁, 刘宇平, 等. 青藏高原东缘鲜水河断裂与龙门山断裂交会区现今的构造活动[J]. 地质通报, 2005, 24(12): 1169-1172.
[16] 江在森, 方颖, 武艳强, 等. 汶川8.0级地震前区域地壳运动与变形动态过程[J]. 地球物理学报, 2009. 52(2): 505-518.
[17] Singh P, Dey S, Bhoi S, et al. Anomalous increase of chlorophyll concentrations associated with earthquakes[J]. Advances in Space Research, 2006, (37): 671-680.　