最强烈的意大利仪器地震的大小调整(1905年9月8日，意大利南部卡拉布里亚地区)

IF 1.2 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Annals of Geophysics Pub Date : 2021-11-12 DOI:10.4401/ag-8675

Luigi Cucci

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引用次数: 0

摘要

1905年9月8日的卡拉布里亚地震是意大利地震目录显示整个数据集中仪器震级最高的地震事件。但是，报告的Ms=7.47仅是在两个站点上计算的，因此有修正的余地。在这项工作中，我提供了对地震表面波震级的新估计，这些震级是由七个不同台站的16个单独的震级值计算得来的。新的估计值Ms=7.06±0.13，这个值与通过宏观地震或地质证据提供的其他估计值一致。尽管几位研究人员提出了不同的震中位置和不同的深度，但新的估计是稳定的。几乎半单位震级的净变化意味着在该地区地震构造的框架内对事件的发震源进行了调整，并强调了对仪器地震学开始时发生的几次“历史”地震的仪器震级估计进行系统修订的强烈需要。

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THE RESIZING OF THE MOST POWERFUL ITALIAN INSTRUMENTAL EARTHQUAKE (SEPTEMBER 8, 1905, CALABRIA REGION, SOUTHERN ITALY)

The 8 September 1905 Calabria earthquake is the seismic event for which the Italian Seismic Catalogue shows the highest instrumental magnitude of the whole dataset. However, the reported Ms=7.47 was calculated over only two stations, and leaves room for a revision. In this work I provide a new estimate of the surface-wave magnitude of the earthquake calculated over sixteen individual values of magnitude from seven different stations. The new estimate is Ms=7.06±0.13, a value that is consistently lined up with other estimates provided by means of macroseismic or geological evidence. The novel estimate is stable despite alternative epicentral locations and different depths proposed for this event by several investigators. The net variation of almost half a unit magnitude implies a resizing of the seismogenic source of the event in the frame of the seismotectonics of the region, and highlights the strong need for a systematic revision of the instrumental magnitude estimates for several ‘historical’ earthquakes that occurred at the dawning of the instrumental seismology.

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来源期刊

Annals of Geophysics 地学-地球化学与地球物理

CiteScore

2.40

自引率

0.00%

发文量

审稿时长

4-8 weeks

期刊介绍： Annals of Geophysics is an international, peer-reviewed, open-access, online journal. Annals of Geophysics welcomes contributions on primary research on Seismology, Geodesy, Volcanology, Physics and Chemistry of the Earth, Oceanography and Climatology, Geomagnetism and Paleomagnetism, Geodynamics and Tectonophysics, Physics and Chemistry of the Atmosphere. It provides: -Open-access, freely accessible online (authors retain copyright) -Fast publication times -Peer review by expert, practicing researchers -Free of charge publication -Post-publication tools to indicate quality and impact -Worldwide media coverage. Annals of Geophysics is published by Istituto Nazionale di Geofisica e Vulcanologia (INGV), nonprofit public research institution.