Probing the sources of ambient seismic noise near the coasts of southern Italy
Probing the sources of ambient seismic noise near the coasts of southern Italy
复制标题
DOI：
10.1029/2007gl031967
复制
发表时间：
2007-11
影响因子：
5.2
通讯作者：
Y. Gu;C. Dublanko;A. Lerner-Lam;Keith Brzak;M. Steckler
中科院分区：
文献类型：
--
作者：
Y. Gu;C. Dublanko;A. Lerner-Lam;Keith Brzak;M. Steckler
在这项研究中，我们探测环境噪声的来源在亚平宁山脉南部和卡拉布里亚弧交叉相关两个月的环境地震噪声记录收集在卡拉布里亚-亚平宁-第勒尼安/俯冲-碰撞-增生网络（CAT/SCAN）项目。显著的瑞利波能量被观察到的噪声相关堆栈的垂直分量，并揭示了多个来源的环境噪声在意大利南部。最主要的噪声源位于沿着：（1）坎帕尼亚南部卡拉布里亚北方的第勒尼安海岸;（2）加尔加诺海角附近的亚得里亚海。在研究期间，从浮标记录中可以明显看出，洋流的增强可能是观测到的微震的原因。我们使用地震记录验证了震源位置，噪声和地震相关函数之间的一致性支持所观察到的环境地震噪声的主导方向。
In this study we probe the source of ambient noise in the southern Apennines and the Calabrian Arc by cross‐correlating two months of ambient seismic noise records collected during the Calabria‐Apennine‐Tyrrhenian/Subduction‐Collision‐Acretion Network (CAT/SCAN) project. Significant Rayleigh wave energy is observed on the vertical component of the noise correlation stacks and reveals multiple sources of ambient noise in southern Italy. The most dominant noise sources are found along (1) the Tyrrhenian coast of northern Calabria‐southern Campania and (2) the Adriatic Sea near the Gargano Promontory. Enhanced ocean currents evident from buoy records during the study period could be responsible for the observed microseisms. We validate the source locations using earthquake records and the consistency between noise and earthquake correlation functions supports the observed dominant directions of ambient seismic noise.