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. 2020 Oct 20;10:17850. doi: 10.1038/s41598-020-74991-0

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Groundwater level, seismic trace, and earthquakes. This figure has been realized using Grapher 7. 18 cases of interaction between signals are exhibited. The groundwater level is shown with the blue line (recorded in PF60.3) and the pink line (recorded in PF60.2), the vertical component of ground motion from local seismic stations (T0110 and INTRodacqua) is displayed with the black line and seismic events are shown with red stars. On the Y axis of the seismic trace, counts are directly proportional to the ground velocity. Seismic data are from the INGV database (available online at https://terremoti.ingv.it/). The numbers on the top of each diagram refer to the earthquake ID reported in the Supplementary Table 1.