UAS-Based Observations of Infrasound Directionality at Stromboli Volcano, Italy
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Abstract
Infrasound (low frequency sound waves) can be used to monitor and characterize volcanic eruptions. However, infrasound sensors are usually placed on the ground, thus providing a limited sampling of the acoustic radiation pattern that can bias source size estimates. We present observations of explosive eruptions from a novel uncrewed aircraft system (UAS)-based infrasound sensor platform that was strategically hovered near the active vents of Stromboli volcano, Italy. We captured eruption infrasound from short-duration explosions and jetting events. While potential vertical directionality was inconclusive for the short-duration explosion, we find that jetting events exhibit vertical sound directionality that was observed with a UAS close to vertical. This directionality would not have been observed using only traditional deployments of ground-based infrasound sensors, but is consistent with jet noise theory. This proof-of-concept study provides unique information that can improve our ability to characterize and quantify the directionality of volcanic eruptions and their associated hazards.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | UAS-Based Observations of Infrasound Directionality at Stromboli Volcano, Italy |
| Series title | Geophysical Research Letters |
| DOI | 10.1029/2023GL102905 |
| Volume | 50 |
| Issue | 8 |
| Year Published | 2023 |
| Language | English |
| Publisher | Wiley |
| Contributing office(s) | Volcano Science Center |
| Description | e2023GL102905, 12 p. |
| Country | Italy |
| Other Geospatial | Stromboli Volcano |
| Google Analytic Metrics | Metrics page |