电离层TEC异常分析——以2022年1月15日汤加火山爆发前为例

Analysis on Ionospheric Tec Anomaly——Taking the Study of Tonga Volcanic Explosion on January 15,2022

2022年1月15日,南太平洋汤加海底火山发生剧烈喷发。为了探测此次火山爆发引起的异常环境响应,利用GPS电离层数据,引入滑动四分位距法探测电离层异常扰动,结果显示:火山爆发前第22天到第27天,总电子含量出现大面积的正异常现象,部分时刻的异常超过10TECU。在火山爆发前第16天、前第10天和前第1天均出现了较轻微的负异常现象,异常均小于5TECU,其中火山爆发前第25~27天的TEC异常可能是由于太阳活动引起的。以上结果表明本研究成功利用GPS技术探测到此次火山爆发过程中的异常环境响应。

On January 15,2022,the submarine volcano of Tonga in the south Pacific Ocean erupted violently.In order to detect the abnormal environmental response caused by the volcanic eruption,by using GPS ionospheric data and introducing the sliding quartile distance method,the ionospheric abnormal disturbance has been to detected.It is showed that:from the 22nd to 27th days before the volcanic eruption,the total electron content had a large area of positive anomalies,and the anomalies at some times exceeded 10TECU.Slight negative anomalies occurred on the 16th,10th and 1st day before the volcanic eruption,all of which were less than 5 TECU.The TEC anomalies on the 25th to 27th days before the volcanic eruption may be caused by solar activity.The above results indicate that the abnormal environmental response during the volcanic eruption can be detected by using GPS technology successfully.