The Valtiberina region (central Italy) has a seismic record going back to the Middle Ages and including five Io > VIII MCS earthquakes, the earliest of which (1352, 1389, 1458). though recently and extensively studied, remain rather poorly known. This makes it all the more important to ensure that the later ones (1789, 1917) are as throughly studied as possible. The 1789 earthquake is listed by the current Italian catalogue (CPTI Working Group 2004) with Io VIII-IX MCS and Mm 5.8. These parameters were assessed from a database of 28 macroseismic intensity data points (Castelli et al. 1996), which is less than plentiful for a late 18th century earthquake. An analysis of the historical context of the 1789 earthquake and its influence on the production of contemporary accounts evidences a few research paths that previous studies either did not or could not take. Following them, the macroseismic database of the 1789 earthquake can be noticeably improved, providing the catalogue compiler with a mean to check the reliability of its current parameters.
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机译：Valtiberina地区（意大利中部）的地震记录可以追溯到中世纪，包括5次Io> VIII MCS地震，其中最早的地震是（1352，1389，1458）。尽管最近进行了广泛研究，但仍然知之甚少。因此，确保尽可能深入地研究后一本书（1789年，1917年）变得尤为重要。当前的意大利目录（CPTI Working Group 2004）将Io VIII-IX MCS和Mm 5.8列为1789年地震。这些参数是从一个包含28个宏观地震烈度数据点的数据库中评估的（Castelli等，1996），这对于18世纪后期的地震来说还不足够。对1789年地震的历史背景及其对当代账目产生的影响的分析表明，以前的研究没有采取或没有采取的一些研究路径。紧随其后，可以显着改善1789年地震的大地震数据库，为目录编辑器提供了一种检查其当前参数可靠性的方法。
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