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Rebuild of the Bulletin of the International Seismological Centre (ISC)—part 2: 1980–2010
Geoscience Letters ( IF 4 ) Pub Date : 2020-11-07 , DOI: 10.1186/s40562-020-00164-6
Dmitry A. Storchak , James Harris , Lonn Brown , Kathrin Lieser , Blessing Shumba , Domenico Di Giacomo

The Bulletin of the International Seismological Centre (ISC) remains in demand for a wide range of geophysical studies. Users of the ISC Bulletin benefit from its long-term coverage, the most comprehensive set of measurements from the majority of permanent seismic stations and networks, and homogeneity of included parameters of earthquakes and other seismic events worldwide. Despite a reasonably conservative approach in preserving the operational procedures, changes are inevitable in order to achieve the best possible accuracy of published earthquake parameters. The last fundamental change in procedures has fully affected the data for years 2011 and beyond (Bondár and Storchak in Geophys J Int 186: 1220-1244, 2011). This is why it was decided to rebuild the earlier part (1964–2010) of the ISC Bulletin to achieve compatibility in earthquake hypocentres and magnitudes through its entire period. The first article on this project (Storchak et al. in Geosci Lett 4: 32, 2017) covered the period from 1964 to 1979, as it was publicly released. This article covers the remaining period from 1980 to 2010 with all seismic events re-processed and re-located in line with the modern ISC procedures, with ~ 489,000 new events, ~ 2600 new stations, ~15.5 million new seismic arrivals, and more robust and reliable mb and MS magnitude evaluations. We give statistics of departures in epicentre location and depth between the original and rebuilt ISC hypocentres. We also provide a summary for the entire rebuilt period (1964–2010). We give a brief account of events deleted from and added to the Bulletin, based on additional reports from permanent and temporary seismic deployments. We explain that newly re-computed (rebuilt) mb is on average larger that the original mb by 0.05 unit of magnitude. The rebuilt MS is only 0.01 unit larger that its predecessor. We announce that the entire reviewed part of the ISC Bulletin (1964–2017) is now based on the same velocity model, ak135, and the same earthquake location and magnitude computation procedures. Finally, we provide advice on how to obtain the original ISC Bulletin data, where necessary.

中文翻译:

重建《国际地震中心》(ISC)公告-第2部分:1980-2010年

国际地震中心(ISC)的公告仍然需要进行广泛的地球物理研究。ISC公告的用户受益于它的长期覆盖范围,大多数永久性地震台站和网络提供的最全面的测量值,以及全球范围内地震和其他地震事件的参数均一性。尽管在保留操作程序方面采取了相当保守的方法,但为了获得已公布的地震参数的最佳准确性,不可避免地要进行更改。程序的最后一次根本变化已完全影响了2011年及以后的数据(Bondár和Storchak在Geophys J Int 186:1220-1244,2011)。这就是为什么决定重建ISC公告的较早部分(1964-2010年)以在整个地震震级和震级上实现兼容的原因。有关该项目的第一篇文章(Storchak等人,Geosci Lett 4:32,2017)涵盖了从1964年到1979年的这段时期,该时期已公开发行。本文涵盖了1980年至2010年的剩余时间,根据现代ISC程序对所有地震事件进行了重新处理和重新定位,新增了约489,000个新事件,约2600个新站,约1,550万个新地震到达,并且功能更强大以及可靠的mb和MS幅度评估。我们给出了原始和重建的ISC震中在震中位置和深度上的偏离的统计数据。我们还提供了整个重建期间(1964-2010年)的摘要。我们根据永久和临时地震部署的其他报告,简要介绍了从公告中删除和添加的事件。我们解释说,新重新计算(重建)的mb平均比原始mb大0.05个数量级。重建的MS仅比其前身大0.01个单位。我们宣布,ISC公告(1964-2017)的整个复审部分现在基于相同的速度模型ak135,以及相同的地震位置和震级计算程序。最后,在必要时,我们提供有关如何获取原始ISC公告数据的建议。01单元比其前身大。我们宣布,ISC公告(1964-2017)的整个复审部分现在基于相同的速度模型ak135,以及相同的地震位置和震级计算程序。最后,在必要时,我们提供有关如何获取原始ISC公告数据的建议。01单元比其前身大。我们宣布,ISC公告(1964-2017)的整个复审部分现在基于相同的速度模型ak135,以及相同的地震位置和震级计算程序。最后,在必要时,我们提供有关如何获取原始ISC公告数据的建议。
更新日期:2020-11-09
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