Infrasonic tremor observed at Kīlauea Volcano, Hawai'i
Infrasonic tremor observed at Kīlauea Volcano, Hawai'i
复制标题
夏威夷基拉韦厄火山观测到次声震颤
DOI：
10.1029/2003gl018038
复制
发表时间：
2003
影响因子：
5.2
通讯作者：
P. Okubo
中科院分区：
文献类型：
--
作者：
M. Garcés;A. Harris;C. Hetzer;Jeffrey R. Johnson;S. Rowland;E. Marchetti;P. Okubo
2002 年 11 月 12 日至 21 日期间在夏威夷基拉韦厄火山收集的次声波阵列数据表明，Pu'u 'Ō'ō 喷口复合体附近的活动喷口和熔岩管系统几乎连续发射 0.3-10 Hz 频段的次声波。这些次声信号的频谱内容与同步地震颤动的频谱内容非常匹配。在不受风噪声影响的地点，距 Pu'u 'Ō'ō 火山口约 13 公里处记录到了显着的信噪比。次声波记录表明一个或多个震源可能靠近地表。此外，这些结果表明，为了获得一致且可靠的次声检测，为次声阵列选择适当的地点和仪器至关重要。
Infrasonic array data collected at Kīlauea Volcano, Hawai'i, during November 12–21, 2002 indicate that the active vents and lava tube system near the Pu'u 'Ō'ō vent complex emit almost continuous infrasound in the 0.3–10 Hz frequency band. The spectral content of these infrasonic signals matches well that of synchronous seismic tremor. In sites protected from wind noise, significant signal to noise ratios were recorded as far as ∼13 km from the crater of Pu'u 'Ō'ō. The infrasonic recordings suggest that one or more tremor sources may be close to the surface. In addition, these results demonstrate that adequate site and instrument selections for infrasonic arrays are essential in order to obtain consistent and reliable infrasonic detections.