Single-station monitoring of volcanoes using seismic ambient noise
Single-station monitoring of volcanoes using seismic ambient noise
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DOI：
10.1002/2016gl070078
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发表时间：
2016-08-28
影响因子：
5.2
通讯作者：
Francis, Olivier
中科院分区：
文献类型：
--
作者：
De Plaen, Raphael S. M.;Lecocq, Thomas;Francis, Olivier
地震环境噪声相互关系越来越多地用于监测火山活动。然而，这种方法通常仅限于配备了庞大而密集的宽带站网络的火山。在测量地震速度变化时，单台站方法可以为传统的跨台站方法提供一种强大而可靠的替代方法。我们在留尼旺岛的富尔奈斯峰（Piton de la Fournaise）实施了它，这是一座非常活跃的火山，拥有出色的多学科连续监测。在过去的十年里，人们越来越多地使用传统的相互关联技术来研究这座火山，因此它代表了一个独特的实验室来验证我们的方法。我们的结果在距离喷发地点3.5公里的站点上进行了测试，结果与传统方法在1-2Hz频段检测火山喷发的效果一样好。这为成功预测配备单一三分量地震仪的火山的火山活动开辟了新的视角。
Seismic ambient noise cross correlation is increasingly used to monitor volcanic activity. However, this method is usually limited to volcanoes equipped with large and dense networks of broadband stations. The single-station approach may provide a powerful and reliable alternative to the classical cross-station approach when measuring variation of seismic velocities. We implemented it on the Piton de la Fournaise in Reunion Island, a very active volcano with a remarkable multidisciplinary continuous monitoring. Over the past decade, this volcano has been increasingly studied using the traditional cross-correlation technique and therefore represents a unique laboratory to validate our approach. Our results, tested on stations located up to 3.5km from the eruptive site, performed as well as the classical approach to detect the volcanic eruption in the 1-2Hz frequency band. This opens new perspectives to successfully forecast volcanic activity at volcanoes equipped with a single three-component seismometer.