Digitizing analog seismograms of Iranian seismic stations — preserving records for strong earthquakes in Iran 1960–1990

IF 1.6 4区 地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS
Mahdy Aghajani, Hossein Ahmadi, Noorbakhsh Mirzaei, Josep Batllo
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Abstract

To preserve the analog records of historical earthquakes which occurred in and around Iran in digital form and to make them available for modern analysis techniques that require waveforms, we decided to digitize seismograms of destructive earthquakes that occurred between 1960 and 1990. The seismograms have been recorded at five seismic stations deployed in Tehran, Mashhad, Kermanshah, Tabriz, and Shiraz by the Institute of Geophysics of the University of Tehran (IGUT). The restoration project of the old analog seismograms archived in the IGUT started in 2018. Seismograms were sorted by station and date to create a hardcopy databank, and then those from large earthquakes and their larger aftershocks were chosen for the scanning process. Seismograms of 52 significant earthquakes and their aftershocks with magnitudes greater than 5.0 that occurred in and around Iran were scanned. Besides that, seismograms of several significant and huge teleseismic earthquakes that occurred between 1960 and 1990 were scanned. At present, almost 600 scanned seismograms are available. The current digitization process in IGUT is done manually and is based on waveform vectorization. The provided databank is one of the most important sources of information for research in seismology and active tectonics in and around Iran.

Abstract Image

伊朗地震台站模拟地震记录的数字化——保存1960-1990年伊朗强震记录
为了保存发生在伊朗及其周边地区的历史地震的数字模拟记录,并使其可用于需要波形的现代分析技术,我们决定将1960年至1990年之间发生的破坏性地震的地震记录数字化。德黑兰大学地球物理研究所(IGUT)在德黑兰、马什哈德、克尔曼沙阿、大不里士和设拉子的五个地震台站记录了地震记录。IGUT存档的旧模拟地震记录恢复工程于2018年启动。地震图按台站和日期分类,形成一个硬拷贝数据库,然后选择来自大地震及其较大余震的地震图进行扫描处理。扫描了发生在伊朗及其周边地区的52次震级大于5.0级的大地震及其余震的地震记录。此外,还扫描了1960年至1990年间发生的几次重大和巨大的远震地震的地震记录。目前,有近600张扫描地震图可用。目前IGUT的数字化过程是手工完成的,并且是基于波形矢量化的。所提供的数据库是伊朗及其周围地震学和活动构造研究的最重要的信息来源之一。
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来源期刊
Journal of Seismology
Journal of Seismology 地学-地球化学与地球物理
CiteScore
3.30
自引率
6.20%
发文量
67
审稿时长
3 months
期刊介绍: Journal of Seismology is an international journal specialising in all observational and theoretical aspects related to earthquake occurrence. Research topics may cover: seismotectonics, seismicity, historical seismicity, seismic source physics, strong ground motion studies, seismic hazard or risk, engineering seismology, physics of fault systems, triggered and induced seismicity, mining seismology, volcano seismology, earthquake prediction, structural investigations ranging from local to regional and global studies with a particular focus on passive experiments.
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