The National Seismological Network (NSN) of India has a history of more than 120 yr. During the last two decades, the NSN has gone through a significant modernization process, involving installation of seismic stations equipped with a broadband seismograph (BBS) and a strong‐motion accelerograph (SMA). Each station has a very‐small‐aperture terminal connectivity for streaming data in real time to the central receiving station (CRS) in New Delhi. Seismic data recorded by the network are analyzed continuously on 24×7 basis to monitor the earthquakes in India and its adjoining regions. In this article, we present details of BBS and SMA network configurations; data streaming from the field seismic stations to the CRS for analysis; and the automatic and manual publication of the earthquake parameters including location coordinates, focal depth, time of occurrence, and magnitude, etc. Details of historically significant analog seismic charts and the seismic catalog, which includes more than 34,000 events with magnitude Mw 1.7–9.3 since 1505, are provided. The national network of India has been strengthened over the years and is now capable of estimating the main earthquake source parameters within ∼5–10min with an average of about 8.0 min. The spatial analysis of minimum magnitude of completeness further indicates a significant enhancement in minimum threshold magnitude detection capability of the network in recent decades.

中文翻译：

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用于实时地震监测的印度国家地震网

印度国家地震台网 (NSN) 已有 120 多年的历史。在过去的二十年中，NSN 经历了重大的现代化进程，包括安装配备宽带地震仪 (BBS) 和强运动加速度仪 (SMA) 的地震台站。每个站都有一个非常小孔径的终端连接，用于将数据实时传输到新德里的中央接收站 (CRS)。网络记录的地震数据在 24×7 的基础上连续分析，以监测印度及其邻近地区的地震。在本文中，我们将详细介绍 BBS 和 SMA 网络配置；从现场地震台站到 CRS 进行分析的数据流；自动和手动发布地震参数，包括位置坐标、震源深度、发生时间、震级等。提供了具有历史意义的模拟地震图和地震目录的详细信息，其中包括自 1505 年以来震级为 1.7-9.3 的 34,000 多个事件。多年来，印度的国家网络得到了加强，现在能够在约 5-10 分钟内估计主要震源参数，平均约 8.0 分钟。最小完整性幅度的空间分析进一步表明，近几十年来网络的最小阈值幅度检测能力显着增强。多年来，印度的国家网络得到了加强，现在能够在约 5-10 分钟内估计主要震源参数，平均约 8.0 分钟。最小完整性幅度的空间分析进一步表明，近几十年来网络的最小阈值幅度检测能力显着增强。多年来，印度的国家网络得到了加强，现在能够在约 5-10 分钟内估计主要震源参数，平均约 8.0 分钟。最小完整性幅度的空间分析进一步表明，近几十年来网络的最小阈值幅度检测能力显着增强。