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. 2020 Jun 24;10:10296. doi: 10.1038/s41598-020-67220-1

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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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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(a) Examples of an explosion-quake in dark-gray with the VLP content highlighted in red, tremor in green and landslide in yellow with the corresponding PSD curves including fitted linear trends on high frequencies (1–25 Hz). (b) Fractal dimension and RSAM (µ/s) for different frequency bands. The software used to create the figure is Matlab R2013a (https://es.mathworks.com/products/matlab.html).