丽江地区丽江—小金河断裂带基岩地温异常变化与地震关系初探
Preliminary study on the relationship between abnormal bedrock ground temperature changes and earthquake occurrence of Lijiang-Xiaojinhe fault
杨珍珍 1陈瑜1
作者信息
- 1. 中国云南 674199 丽江市古城区地震局
- 折叠
摘要
利用丽江—小金河断裂沿线 5 个基岩地温观测点高精度温度数据,与同区域地震活动进行对比分析,发现 1 个或多个基岩地温测点数据出现异常变化后,一定范围内有发生地震的实例.结果显示:①2022 年 1 月 2 日宁蒗MS 5.5 地震前,基岩地温无明显异常,然而在当年 4 月 16 日宁蒗MS 4.6 余震发生前,基岩地温异常明显,并伴有宏观异常;②不同构造位置,基岩温度异常幅度不同,变化模式也存在差异.沿丽江—小金河断裂,其基岩温度异常变化对断裂带沿线地区地震活动具有较好的映震效果,但也显示出异常分布的复杂性,需积累更多震例做进一步研究.
Abstract
In this paper,we use high-precision ground temperature observation data of bedrock from five observation sites near the Lijiang-Xiaojinhe fault and analyze them in comparison with seismic activities in the same region.We found several earthquakes occurring within a certain range,after the abnormal changes of bedrock ground temperature.The results showed that:① no obvious anomalies in bedrock ground temperature were observed before the Ninglang MS 5.5 earthquake;however,after the MS 5.5 earthquake and before the Ninglang MS 4.6 earthquake,obvious anomalies in bedrock ground temperature were observed,accompanied by macroscopic anomalies.② The bedrock ground temperature anomalies are different in magnitude and show different change patterns at different tectonic locations,showing the complexity of the anomaly distribution.In conclusion,the bedrock ground temperature anomalies along the Lijiang-Xiaojinhe fault have a better seismic reflection effect on the earthquakes near the rupture zone,but they also show the complexity of the anomaly distribution,which needs further study with more earthquake cases.
关键词
基岩高精度地温/丽江—小金河断裂/地震活动性Key words
high-precision ground temperature/Lijiang-Xiaojinhe fault/seismic activity引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据