Information about historical earthquakes in the Iberian Peninsula going back to Antiquity (Roman times) can be found in different types of documents, such as unpublished contemporary manuscripts preserved in archives, general, and regional histories in Spain and Portugal, published documents and reports on the damage of specific earthquakes, and reports in newspapers and magazines. The 1755 Lisbon earthquake marks an important point for the study of historical earthquakes in the peninsula. The compilation and interpretation of historical data presents many problems, one of which is how to express the many uncertainties in the focal parameters of historical earthquakes in earthquake catalogs.

中文翻译：

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1900年之前伊比利亚半岛和近海地区地震的历史渊源

有关伊比利亚半岛追溯到上古（罗马时代）的历史地震的信息，可以在不同类型的文档中找到，例如保存在西班牙和葡萄牙档案，一般和区域历史中的未出版的现代手稿，已出版的文件和有关该报告的报告。特定地震的破坏以及报纸和杂志上的报道。1755年的里斯本地震标志着该半岛历史地震研究的重要点。历史数据的汇编和解释存在许多问题，其中之一就是如何在地震目录中表达历史地震震源参数中的许多不确定性。