The National Observatory of Athens data center for the European Integrated Data Archive (EIDA@NOA) is the national and regional node that supports International Federation of Digital Seismograph Networks and related webservices for seismic waveform data coming from the southeastern Mediterranean and the Balkans. At present, it serves data from eight permanent broadband and strong‐motion networks from Greece and Cyprus, individual stations from the Balkans, temporary networks and aftershock deployments, and earthquake engineering experimental facilities. EIDA@NOA provides open and unlimited access from redundant node end points, intended mainly for research purposes (see Data and Resources). Analysis and quality control of the complete seismic data archive is performed initially by calculating waveform metrics and data availability. Seismic ambient noise metrics are estimated based on power spectral densities, and an assessment of each station’s statistical mode is achieved within each network and across networks. Moreover, the minimum ambient noise level expected for strong‐motion installations is defined. Sensor orientation is estimated using surface‐wave polarization methods to detect stations with misalignment on particular epochs. A single data center that hosts the complete seismic data archives with their respective metadata from networks covering similar geographical areas allows coordination between network operators and facilitates the adhesion to widely used best practices regarding station installation, data curation, and metadata definition. The overall achievement is harmonization among all contributing networks and a wider usage of all data archives, ultimately strengthening seismological research efforts in the region.

中文翻译：

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来自希腊和塞浦路斯的地震波形数据：集成，归档和开放访问

欧洲综合数据档案馆（EIDA @ NOA）的雅典国家天文台数据中心是国家和地区节点，支持国际数字地震仪网络联合会和有关来自东南地中海和巴尔干地区的地震波形数据的相关Web服务。目前，它为来自希腊和塞浦路斯的八个永久性宽带和强运动网络，巴尔干地区的各个站点，临时网络和余震部署以及地震工程实验设施提供数据。EIDA @ NOA提供从冗余节点端点的开放和无限访问，主要用于研究目的（请参阅数据和资源）。首先，通过计算波形指标和数据可用性来对完整的地震数据档案进行分析和质量控制。根据功率谱密度估算地震环境噪声指标，并在每个网络内和整个网络内对每个站的统计模式进行评估。此外，还定义了强力运动装置预期的最小环境噪声水平。使用表面波极化方法来估计传感器方向，以检测在特定时期未对准的台站。包含完整地震数据档案库的单个数据中心，以及来自覆盖相似地理区域的网络的相应元数据，可以在网络运营商之间进行协调，并有助于遵守有关站点安装，数据管理和元数据定义的广泛使用的最佳实践。总体成就是所有贡献网络之间的协调统一以及所有数据档案的更广泛使用，