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地震 ›› 2022, Vol. 42 ›› Issue (2): 161-170.doi: 10.12196/j.issn.1000-3274.2022.02.013

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2020年12月23日青海玉树火流星的宽频带数字地震台网记录

王九洋1, 马莉2, 杨士超2, 王亮2   

  1. 1.大连地震监测中心站, 辽宁 大连 116012;
    2.辽宁省地震局, 辽宁 沈阳 110031
  • 收稿日期:2020-12-31 修回日期:2021-06-05 出版日期:2022-04-30 发布日期:2023-02-17
  • 作者简介:王九洋(1979-), 男, 黑龙江牡丹江人, 高级工程师, 主要从事全球尺度测震资料研究。
  • 基金资助:
    辽宁省地震局重点课题项目(LZ202002); 辽宁省科学技术计划项目(2017231013)

Response of Qinghai Yushu Fireball in Broadband Digital Seismic Network on December 23, 2020

WANG Jiu-yang1, MA Li2, YANG Shi-chao2, WANG Liang2   

  1. 1. Dalian Seismic Monitoring Center Station, Dalian 116012, China;
    2. Seismological Bureau of Liaoning Province, Shenyang 110031, China
  • Received:2020-12-31 Revised:2021-06-05 Online:2022-04-30 Published:2023-02-17

摘要: 宽频带地震计在地震监测领域发挥着重要作用。 由于其具备大动态范围、 高灵敏度等优点, 也被广泛应用于塌陷、 爆破、 矿震、 核试验乃至陨石爆炸裂解等信号的拾取。 2020年12月23日发生于中国青海省玉树市的火流星是近年来较为少见的成规模近地小天体入射大气层事件。 青海地震台网清晰地捕捉到了此次事件。 通过分析青海地震台网记录, 初步判断此次火流星的运行轨迹为近NNW至SSE方向, 方位角约160°。 在空中解体后至少有三块较大碎块坠落形成陨石, 并给出了主事件可能的落点在青海省囊谦县内。

关键词: 陨石, 宽频带数字地震计, 玉树, 声波震相

Abstract: Broadband seismograph plays an important role in the field of earthquake monitoring. Because of the advantages of large dynamic range and high sensitivity, it can also be widely used in the signal acquisition of collapse, blasting, mine vibration, nuclear test, even meteorite explosion cracking and so on. The meteor event occurred on December 23, 2020 in Yushu, Qinghai Province, China, is a rare event in recent years. Qinghai seismic network clearly captured the event. Based on the analysis of the records of Qinghai seismic network, it is preliminarily judged that the trajectory of the meteor is near NNW to SSE direction with the azimuth about 160°. After disintegration in the air, at least three larger fragments fell to form meteorites. The possible falling point of the main event is given in Nangqian, Qinghai province.

Key words: Meteorite, Broadband digital seismometer, Yushu, Acoustic phase

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