【摘要】 以墨西哥湾西北部陆坡区为研究区,利用NOAA/AVHRR热红外影像,通过分析1999年Central Mexico 7.0级地震、1999年Oaxaco 7.5级地震和2003年Colima 7.6级地震3次地震期间与墨西哥湾西北部陆坡区海底天然气水合物藏区对应的海表面上方卫星热红外亮温异常的变化,研究了卫星热红外亮温异常与深水海域天然气水合物藏区分布的关系。研究发现,与墨西哥湾西北部陆坡区海底天然气水合物藏区对应的海表面上方,临震前频繁出现孤立的、带状的、强度较大的卫星热红外亮温异常,该研究结果表明,同次和多次地震临震前,该地区频繁出现孤立、带状、强度较大的卫星热红外亮温异常可能与海底蕴藏着天然气水合物藏有关。更多还原

【Abstract】 Based on an analysis of satellite thermal infrared brightness temperature anomalies over northwestern Gulf of Mexico continental slope during three earthquakes,the Central Mexico M7.0 earthquake in 1999,the Oaxaco M7.5 earthquake in 1999,and the Colima M7.6 earthquake in 2003,the relationship that between satellite thermal infrared brightness temperature anomalies and the distribution of deep-water oceanic gas hydrates was researched by using NOAA/AVHRR thermal infrared images.The phenomena were discovered that the isolated,zonal and stronger satellite thermal infrared brightness temperature anomalies areas appear frequently over deep-water oceanic gas hydrates on northwestern Gulf of Mexico continental slope before the earthquakes burst out.Above results show that these anomalies relate with gas hydrates in seafloor possibly.更多还原