Thermal mapping: the hydrothermal system of a volcano used to map faults and palaeostructures within stratified ground. The Yasur-Yenkahe volcanic complex (Vanuatu)

Abstract Present-day volcano imaging and monitoring relies primarily on ground surface and satellite remote sensing observations. The overall understanding of the volcanic edifice and its dynamics is thus limited by surface investigation, spatial resolution and penetration depth of the ground methods, but also by human and material resources, and harsh environments. Here, we show for the first time that an airborne electromagnetic survey provides a 3D global resistivity model of an active volcano. The high-resolution survey acquired at the Piton de la Fournaise volcano on La Réunion Island, Indian Ocean, shows unprecedented details of the internal structure of the edifice, highlighting the upwelling hydrothermal system below the craters, magma intrusion pathways and inherited faults. Together with surface monitoring, such airborne imagery have a high potential to better characterize volcano internal structure and magmatic processes, and therefore to better anticipate catastrophic events such as phreato-magmatic eruptions or volcano destabilizations.

10.1038/s41598-019-54415-4

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Citations (16)

Monitoring Of Volcanic Processes Through Analysis Of Hydroacoustic Signals Originating From Monowai Seamount

AGUFM (2010)

K. E. Cook D. R. Bohnenstiehl Robert P. Dziak H. Matsumoto Matthew Fowler

Seamount

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Determination of submarine volcanic growth at Mariana Volacanic ARC area using [multibeam echosounder common dataset] between year 2010 and 2014 / Nurul Afifah Ismail

Nurul Afifah Ismail

Eruption of the underwater volcanic is a natural disaster that is capable of bringing huge impact to depth of the seafloor and underwater life. Today, multibeam echo sounder system (MBES) can produce a most detailed of navigation map. Moreover, it can even map of marine environment for the scientific purposes. The purpose of this study is to determine the active growth of submarine volcano at Mariana Volcanic Arc. The objectives of the study are to identify the area of submarine volcano, determine the characteristic of submarine volcano based on soil types and to analyze the change of structure of submarine volcanic based on different time period. The growth of submarine volcano is analyzed based on the surface of submarine volcano from digital elevation model (DEM) and growth calculation. This study applies MBES data that process using Qimera, Flerdermaus ERDAS and ArcGIS software. The type of seafloor is determined by Angular Range Analysis (ARA) technique from backscatter data analysis while the analysis of submarine volcano growth is to determine using qualitative raster and statistical technique in GIS software. This study promotes the capability of multibeam common dataset to interpret and determine submarine volcano growth over 4 years whether submarine volcano at Mariana Volcanic Arc is still active or inactive. Broth of submarine volcano based on the minus map shows that the area has grown and experienced a landslide. The calculation of area and volume show the volcanic growth has increased 0.4% in four years. It concludes that, submarine volcano at the study area shown is at the active stage of volcano eruption.

Submarine volcano

Seafloor Spreading

Volcanic cone

Volcanic arc

Submarine landslide

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Determining Volcanic Deformation at San Miguel Volcano, El Salvador by Integrating Radar Interferometry and Seismic Analyses

AGUFM (2008)

C. G. Schiek J. M. Hurtado A. A. Velasco S. Buckley D. Escobar

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