| 汤加火山喷发所产生的次声波 |
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| 引用本文： | 程巍,滕鹏晓,吕君,张天予.汤加火山喷发所产生的次声波[J].声学学报,2022,47(2):289-291. |
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| 作者姓名： | 程巍 滕鹏晓 吕君 张天予 |
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| 作者单位： | 1. 中国科学院声学研究所 北京 100190; |
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| 基金项目： | 国家自然科学基金项目(11774372,11874389)资助； |
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| 摘 要： | 2022年1月15日汤加火山发生了剧烈的喷发。在火山喷发后的8 h 39 min,距离火山喷发位置10151 km的昆明次声台阵记录到很强的次声波信号。次声波波列前几个周期平均为443 s,传播速度约为321 m/s,其波形幅度与频率随时间变化与核爆炸产生的次声波形相似。采用相关检测方法估计次声信号的方位角为119°。在持续监测中,还观测到了火山喷发产生的次声信号沿反方向绕地球到达的信号和沿正方向绕地球一周后再次到达的信号。
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| 关 键 词： | 火山喷发 次声监测 相关检测 次声传播 |
| 收稿时间： | 2022-01-22 |
On the infrasonic waves generated from the volcano eruption in Tonga |
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| Institution: | 1. Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190;2. Key Laboratory of Noise and Vibration Research, Chinese Academy of Sciences, Beijing 100190;3. University of Chinese Academy of Sciences, Beijing 100049 |
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| Abstract: | The Tonga volcano erupted violently on January 15 th,2022.An infrasound array located in Kunming at a distance of 10151 km away from the volcano recorded a sequence of strong infrasonic waves after 8 hours and 39 minutes.The average period of the first four infrasonic wave trains is 443 s with a propagation velocity of 321 m/s.The frequency and amplitude characteristics of the infrasonic waves are similar to those of nuclear explosions.The azimuth is estimated to be 119°using Progressive Multi-Channel Correlation(PMCC)method.During the continuous monitoring,the infrasonic waves propagating along and opposite the direction towards the Kunming array around the earth are recorded respectively. |
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