Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2023 Nov 30;13:21135. doi: 10.1038/s41598-023-48396-8

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2023

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/.

PMC Copyright notice

(a) recordings of acoustic pressure at the infrasonic array displayed in panel (c). The y-axis unit is in Pa. (b) Results from beam-forming analysis. From top to bottom, the different panels illustrate the temporal evolution of the beam-power, back azimuth to the source, apparent velocity. Symbols are sized according to the beam power, and colored as a function of the multichannel coherence, according to the color scale reported in the middle panel. The shaded patches mark the region for which the beam power is larger than 50% of the largest power. (c) Location of the infrasonic array in central Italy; the azimuthal wedge corresponds to the range of back azimuth selected from the middle plot in panel (b). The inset shows the geometry of the array.