Volcán de Fuego (Guatemala) monitoring with the Normalized Hotspot Indices (NHI) tool DOI Creative Commons
Nicola Genzano,

José Armando Saballos,

Wendel Gutierrez

et al.

ISPRS annals of the photogrammetry, remote sensing and spatial information sciences, Journal Year: 2024, Volume and Issue: X-3-2024, P. 147 - 154

Published: Nov. 4, 2024

Abstract. Volcán de Fuego is a stratovolcano located in Guatemala among the most active world. In this work, we investigate its eruptive activity from space by means of Normalized Hotspot Indices (NHI) algorithm. The latter runs operationally under Google Earth Engine (GEE) platform providing information on volcanoes at global scale daytime Sentinel 2 MSI (Multispectral Instrument) and Landsat 8/9 OLI/OLI2 (Operational Land Imager) data. study, present results time series analysis performed investigating 40 years observations through NHI Results show that during major periods thermal (e.g., 2000−2003; 2012−2013; 2015−2018) generated extended lava flows, which were well identified mapped satellite. addition, reduced 2022−May 2024) marked good agreement with provided independent sources. accurate localization mapping high-temperature features, characterization different phases, demonstrate algorithm, GEE-App available online (https://sites.google.com/view/nhi-tool/nhi-tool-for-volcanoes), may support scientists also monitoring frequently such as Fuego, about changes volcanic could precede future more dangerous eruptions.

Language: Английский

A Hidden Eruption: The 21 May 2023 Paroxysm of the Etna Volcano (Italy) DOI Creative Commons
Emanuela De Beni, Cristina Proietti, Simona Scollo

et al.

Remote Sensing, Journal Year: 2024, Volume and Issue: 16(9), P. 1555 - 1555

Published: April 27, 2024

On 21 May 2023, a hidden eruption occurred at the Southeast Crater (SEC) of Etna (Italy); indeed, bad weather prevented its direct and remote observation. Tephra fell toward southwest, two lava flows propagated along SEC’s southern eastern flanks. The monitoring system Istituto Nazionale di Geofisica e Vulcanologia testified to occurrence. We analyzed seismic infrasound signals constrain temporal evolution fountain, which lasted about 5 h. finally reached Etna’s summit weeks later found an unexpected pyroclastic density current (PDC) deposit covering flow middle portion. performed unoccupied aerial field surveys reconstruct in 3D SEC, flows, PDC deposits collect some samples. data allowed for detailed mapping, quantification, characterization products. resulting volumes were (1.54 ± 0.47) × 106 m3 (1.30 0.26) 105 m3, respectively. also ground-radar satellite evaluate that plume height ranges between 10 15 km. This work is comprehensive analysis fieldwork, UAS, volcanic tremor, infrasound, radar, data. Our results increase awareness activity potential dangers visitors area.

Language: Английский

Citations

5
Exploring the Potential of a Normalized Hotspot Index in Supporting the Monitoring of Active Volcanoes Through Sea and Land Surface Temperature Radiometer Shortwave Infrared (SLSTR SWIR) Data DOI Creative Commons
Alfredo Falconieri, Francesco Marchese, Emanuele Ciancia

et al.

Sensors, Journal Year: 2025, Volume and Issue: 25(6), P. 1658 - 1658

Published: March 7, 2025

Every year about fifty volcanoes erupt on average, posing a serious threat for populations living in the neighboring areas. To mitigate volcanic risk, many satellite monitoring systems have been developed. Information from medium infrared (MIR) and thermal (TIR) bands of sensors such as Moderate Resolution Imaging Spectroradiometer (MODIS) Visible Infrared Radiometer Suite (VIIRS) is commonly exploited this purpose. However, potential daytime shortwave (SWIR) observations Sea Land Surface Temperature (SLSTR) aboard Sentinel-3 satellites supporting near-real-time activity has not fully evaluated so far. In work, we assess by exploring contribution normalized hotspot index (NHI) recent Home Reef (Tonga Islands) eruption. By analyzing time series maximum NHISWIR value, computed over area, inferred information waxing/waning phases lava effusion during four distinct subaerial eruptions. The results indicate that first eruption phase (September–October 2022) was more intense than second one (September–November 2023) comparable with fourth eruptive (June–August 2024) terms intensity level; third (January difficult to investigate because cloudy conditions. Moreover, adapting NHI algorithm SLSTR SWIR data, found detected anomalies complemented those night-time conditions identified quantified operational Level 2 fire radiative power (FRP) product. This study demonstrates NHI-based algorithms may contribute investigating active located even remote areas through data at 500 m spatial resolution, encouraging development an automated processing chain means night-time/daytime data.

Language: Английский

Citations

0
Analysis of Lava from the Cumbre Vieja Volcano Using Remote Sensing Data from DESIS and Sentinel-2 DOI Creative Commons
R. de los Reyes, Rudolf Richter, Simon Plank

et al.

Remote Sensing, Journal Year: 2024, Volume and Issue: 16(2), P. 351 - 351

Published: Jan. 16, 2024

On 19th September 2021, a protracted eruption of the Cumbre Vieja Volcano on Canary Island La Palma commenced and continued for duration 12 weeks. Lava flows starting from rift zone at mid-western flank advanced toward western coast island. The was monitored by different remote sensing satellites, including Copernicus Sentinel missions DESIS. Sentinel-2 satellites acquired multispectral data 15th onward. 30th, with difference ∼2 h respect to A, DESIS hyperspectral sensor also volcano then again October 2021. Typically, mid-infrared (around 3.8 μm) are used thermal analysis active lava flows. However, neither nor possesses bands high-wavelengths (∼2 have some limitations. Nevertheless, character enables erupting volcanoes in near-infrared wavelengths. results this find fluid temperatures about 1100–1200 K but there problems associated high-temperature spectral emissivity.

Language: Английский

Citations

1
High-resolution modelling of island exposure to natural hazards tested with real disasters DOI Creative Commons
Nicolás Ferrer,

Gustavo Herrera

Applied Geography, Journal Year: 2024, Volume and Issue: 165, P. 103239 - 103239

Published: Feb. 24, 2024

Oceanic islands are multi-risk territories but statistical aggregation of socio-economic exposure data is often a constraint for high-resolution risk modelling and hazard prevention. This work presents downscaling procedure to obtain complete cartographic base on the distribution main variables in Canary Islands (Spain). For this purpose, new dasymetric has been developed based combination cadastral censuses, detailed planimetries LiDAR altimetry data. The methodology allowed construction an (ECB) that comprises population, capital stock, productivity heritage (cultural natural) layers, covering entire archipelago at 2.5 m resolution. ECB results was tested accuracy found be 90% accurate within positional range 50 m. then compared with real damages three recent natural disasters: volcanic eruption La Palma 2021, wildfire Gran Canaria 2019 coastal flooding Tenerife 2018. comparison between modelled actual damage revealed consistency full-damage events need incorporate vulnerability factor more estimate partial events.

Language: Английский

Citations

1
Thermal Emissions of Active Craters at Stromboli Volcano: Spatio‐Temporal Insights From 10 Years of Satellite Observations DOI Creative Commons
Francesco Massimetti, Marco Laiolo, Alessandro Aiuppa

et al.

Journal of Geophysical Research Solid Earth, Journal Year: 2024, Volume and Issue: 129(9)

Published: Aug. 31, 2024

Abstract Open‐vent volcanoes continuously emit magmatic products and frequently feature multiple adjacent craters. Temporal shifts of thermal emissions between craters are especially detectable by InfraRed satellites. Here, SENTINEL‐2 LANDSAT‐8/9 Short Wave (SWIR) high‐spatial resolution satellite data, combined to investigate 10 years (2013–2023) activity at Stromboli volcano (Italy). The correlation Volcanic Radiative Power (VRP, in Watts) Energy (VRE, Joules), retrieved moderate MODIS VIIRS Middle (MIR) with the Thermal Index SWIR (TI ) allows us quantify long‐term series heat fluxes (VRP energy (VRE ). Combining higher spatial data fitting cumulative trends TI VRE MIR measure sourced single during Strombolian activity. Long‐term results highlight that clustered northern southern parts crater terrace, total emitted (∼12 × 14 J) equally distributed. increase since April 2017 marked a reactivation shallow magma transportation an intensification after 2014 eruption. Distinct behaviors shown NE, C, SW craters, related mechanisms explosions. We found short‐term variations match well those resolved ground‐based signals, NE as most sensitive transition higher‐intensity Our multispatial/multisensory investigation allows, for first time, quantification flux from Stromboli's improved understanding open‐vent dynamics new approach monitor active

Language: Английский

Citations

1
TIRVolcH: Thermal Infrared Recognition of Volcanic Hotspots. A single band TIR-based algorithm to detect low-to-high thermal anomalies in volcanic regions. DOI Creative Commons
S. Aveni, Marco Laiolo, Adele Campus

et al.

Remote Sensing of Environment, Journal Year: 2024, Volume and Issue: 315, P. 114388 - 114388

Published: Oct. 3, 2024

Language: Английский

Citations

1
VogCast: A Framework for Modeling Volcanic Air Pollution and Its Application to the 2022 Eruption of Mauna Loa Volcano, Hawai'i DOI Creative Commons
Nadya Moisseeva, Steven Businger, Tamar Elias

et al.

Journal of Geophysical Research Atmospheres, Journal Year: 2023, Volume and Issue: 128(22)

Published: Nov. 10, 2023

Abstract Volcanic activity and the associated gas emissions into atmosphere often result in adverse air quality conditions present a hazard to human health environment. Building on decade‐long effort provide operational surface sulfur dioxide sulfate aerosol forecasts for State of Hawai'i, we an modeling framework called VogCast. VogCast is designed simplify ensemble prediction regional scale by linking together multiple state‐of‐the‐art models meteorology, emissions, dispersion. The open‐source introduces new dynamic plume‐rise algorithm distributing pollutants vertically. Using radar satellite data, demonstrate that reasonably captured mean injection height, location, general envelope vog plume during Mauna Loa's 2022 eruption. results suggest 12‐day eruption period model performance varied between days with trade non‐trade wind conditions. Our findings also highlight importance emission rate vent parameter inputs improving forecast accuracy. broad goal this work better our understanding dispersion improve impacted communities.

Language: Английский

Citations

3
Volcán de Fuego (Guatemala) monitoring with the Normalized Hotspot Indices (NHI) tool DOI Creative Commons
Nicola Genzano,

José Armando Saballos,

Wendel Gutierrez

et al.

ISPRS annals of the photogrammetry, remote sensing and spatial information sciences, Journal Year: 2024, Volume and Issue: X-3-2024, P. 147 - 154

Published: Nov. 4, 2024

Abstract. Volcán de Fuego is a stratovolcano located in Guatemala among the most active world. In this work, we investigate its eruptive activity from space by means of Normalized Hotspot Indices (NHI) algorithm. The latter runs operationally under Google Earth Engine (GEE) platform providing information on volcanoes at global scale daytime Sentinel 2 MSI (Multispectral Instrument) and Landsat 8/9 OLI/OLI2 (Operational Land Imager) data. study, present results time series analysis performed investigating 40 years observations through NHI Results show that during major periods thermal (e.g., 2000−2003; 2012−2013; 2015−2018) generated extended lava flows, which were well identified mapped satellite. addition, reduced 2022−May 2024) marked good agreement with provided independent sources. accurate localization mapping high-temperature features, characterization different phases, demonstrate algorithm, GEE-App available online (https://sites.google.com/view/nhi-tool/nhi-tool-for-volcanoes), may support scientists also monitoring frequently such as Fuego, about changes volcanic could precede future more dangerous eruptions.

Language: Английский

Citations

0