Northern Finland Seismological Network

Sodankylä geophysical observatory (SGO) has operated in Sodankylä in northern Finland since 1913. SGO was originally founded by the Finnish Academy of Science and Letters. Now it takes care of national and international duties studying the space and geoenvironment as an independent research organisation in the University of Oulu. SGO performs long-term measurements, builds instruments, innovates and maintains domestic and international measurements, and performs research from these measurements. The seismic observations at SGO started in Sodankylä 1956. In 2005-2006 SGO seismic stations were updated to broadband instrumentation and connected to GEOFON data center. Today, the number of seismic stations has increased to 9. The stations have Streckeisen STS-2 or Nanometrics Trillium PA/PH broadband sensors. 3 of the stations are so called Posthole stations located in borehole 5-22 m below surface. The rest of the stations are located on the surface or in a more traditional type of vault. Data acquisition systems are either Earth Data PS6-24 digitisers and PC with Seiscomp or Nanometrics Centaurs. The continuous waveform data are collected at 100 Hz sampling frequency. The data are available from GEOFON data center. Further information about instrumentation can be found at the Institute’s web site (https://www.sgo.fi/). Waveform data are available from the GEOFON data centre, under network code FN, and arefully open.

索丹屈莱地球物理观测站（Sodankylä Geophysical Observatory, SGO）自1913年起便在芬兰北部的索丹屈莱投入运营。该观测站最初由芬兰科学与文学院（Finnish Academy of Science and Letters）创立，如今作为奥卢大学旗下的独立研究机构，承担空间与地球环境研究的国家及国际科研职责。SGO开展长期观测、仪器研制、技术创新，运维国内外观测网络，并基于观测数据开展相关研究工作。该站的地震观测于1956年在索丹屈莱启动。2005至2006年间，SGO的地震台站升级为宽频带观测设备，并接入GEOFON数据中心。目前，其地震台站总数已增至9座，全部配备Streckeisen STS-2型或Nanometrics Trillium PA/PH型宽频带传感器。其中3座为钻孔式台站（Posthole stations），部署于地表以下5至22米的钻孔中；其余台站则部署于地表或更传统的观测拱券内。数据采集系统分为两类：一类为Earth Data PS6-24型数字化仪搭配搭载Seiscomp软件的PC，另一类为Nanometrics Centaurs系统。连续波形数据以100 Hz的采样率进行采集，相关数据可从GEOFON数据中心获取。更多仪器相关信息可访问该机构官网（https://www.sgo.fi/）。波形数据可通过GEOFON数据中心获取，其网络代码为FN，且完全开放。