UNOSAT code VO20221206IDN, GDACS Id: 1000057 This map illustrates the potentially affected areas by pyroclastic flow/deposits of the December 2022 Semeru mount eruption in East Java (Indonesia) as detected by satellite images acquired on 4 Dec 2022 10km SE Mount Semeru. Based on analysis of Worldview-3, Spot 6 and Sentinel-2 images acquired on 9, 11 & 12 Dec. 2022 respectively, about 460ha of land appear to be severely affected by the volcanic eruption induced effects in the analyzed area of about 2,000ha. Within this area, UNOSAT has identified 206 affected structures and 10 potentially affected structures. Based on Worldpop population data and affected area by the pyroclastic flow/deposit, about 1,500 people are potentially exposed in this zone. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to the United Nations Satellite Centre (UNOSAT).

UNOSAT code VO20221206IDN, GDACS Id: 1000057 This map illustrates the potentially affected areas by pyroclastic flow/deposits of the December 2022 Semeru mount eruption in East Java (Indonesia) as inferred from post eruption satellite images VRRS, Worldview-3, Spot 6, and Sentinel-2, images acquired on 8, 9, 11 & 12 Dec. 2022 respectively. Within this area, UNOSAT has identified 208 affected structures and 221 structures are potentially affected. Based on Worldpop population data, WSF urban areas data, about 7ha of urban areas are affected by the pyroclastic flow/deposit and about 8,000 people are potentially directly exposed to pyroclastic flow in this zone. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to the United Nations Satellite Centre (UNOSAT).

UNOSAT code VO20221206IDN, GDACS Id: 1000057 Live web map providing geospatial information potentially affected areas by pyroclastic flow/deposits after the December 2022 Mount Semeru volcanic eruption in East Java. This web map gives an updated overview over potentially affected structures and affected structures based on very high-resolution satellite images and also Pyroclastic flow/deposits.

UNOSAT code: VO20211205IDN This map illustrates the potentially affected areas by Lahar and Pyroclastic density currents (PDCs) including geological information of Mount Semeru, Java province, Indonesia as detected by satellite images acquired after the eruption of the Mount Semeru on 4 Dec 2021. UNITAR-UNOSAT analysis used Pleiades images acquired on 10 & 11 Dec 2021 to estimate the affected area by Lahar and Pyroclastic density currents. Within the analyzed area, about 3,220 ha appear to be affected. Based on Worldpop population data and affected area by Lahar and pyroclastic density currents, about 8,400 people are potentially exposed or living close to pyroclastic density area. In addition, base on Esri 2020 Land Cover, potentially affected in tree area ~2,100ha, scrub/shrub area ~ 400 ha, cropland ~ 165 ha, built area ~ 140 ha. Important note: Pyroclastic density currents (PDCs) are perhaps the most hazardous events to local areas during explosive volcanic eruptions. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to United Nations Satellite Centre (UNOSAT).

UNOSAT code: VO20211025VUT This map illustrates the volcanic ashfall dispersion as observed using Sentinel-2 imagery acquired on 23 October 2021, 10:00 hrs. local time over Yasur volcano on Tanna Island, Vanuatu. At the time of the acquisition, the ashfall covered about 20 km2 at the Southwestern direction of the volcanic crater. Using the building footprints of Humanitarian Open Street Map as a baseline, around 440 buildings in the cloud free zone are located within areas covered by ash and smoke, representing 3% of the total number of buildings in Tanna island. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to United Nations Satellite Centre (UNOSAT).

UNOSAT code: VO20210523COD This map illustrates the lava flow extent and the related geological information north of Goma airport, Nord-Kivu province, D.R. of the Congo as detected by satellite images acquired after the eruption of the Mount Nyiragongo on 22 May 2021. UNITAR-UNOSAT analysis used Sentinel-1 acquired on 25 May 2021, Sentinel-2 & Pleiades images acquired on 1 June 2021, at respectively 16:21 UTC, 08:30 UTC and 11:35 UTC, to extract the lava flow extent. Within this map, three vents have been identified along the hillside south of Nyiragongo caldera. In addition, about 10 km of fissures have been mapped and are mainly in NNE-SSW and NNW-SSE directions. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR-UNOSAT.

UNOSAT code: VO20210523COD This map illustrates the lava flow extent and the related geological information north of Goma airport, Nord-Kivu province, D.R. of the Congo as detected by satellite images acquired after the eruption of the Mount Nyiragongo on 22 May 2021. UNITAR-UNOSAT analysis used Sentinel-2 and SAOCOM-1A images acquired on 27 May 2021, at respectively 08:30 UTC and 02:21 UTC, to extract the lava flow extent. Within this map, three vents have been identified along the hillside south of Nyiragongo caldera. In addition, about 10 km of fissures have been mapped and are mainly in NNE-SSW and NNW-SSE directions. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR-UNOSAT.

UNOSAT code: VO20210523COD This map illustrates potentially affected structures and buildings north of Goma airport, Nord-Kivu province, D.R. of the Congo as detected by satellite image acquired after the eruption of the Mount Nyiragongo euption of 22 May 2021. UNITAR-UNOSAT analysis used a Sentinel-1 image acquired on 25 May 2021, at 16:21 UTC, to extract the lava flow extent. Within this map extent, 1,540 structures and 9 km of roads appear to be affected by the lava. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR-UNOSAT.

UNOSAT code: VO20210523COD This map illustrates potentially affected structures and roads in Kanyanza village, Nyiragongo district, Nord-Kivu province, D. R. of the Congo as detected by satellite image acquired after the volcanic eruption of the 22 May 2021. UNITAR-UNOSAT analysis used a Sentinel-1 image acquired on 25 May 2021, at 16:21 UTC. Within the map extent, about 144 structures and 1,400m of roads are potentially affected by the lava. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR-UNOSAT.

UNOSAT code: VO20210523COD This map illustrates potentially affected structures and buildings in Nyiragongo district, Nord-Kivu province, DR Congo as detected by satellite image acquired after the 22 May 2021 Nyiragongo volcanic eruption. UNITAR-UNOSAT analysis used a Sentinel-1 image acquired on 25 May 2021, at 16:21 UTC, to extract the lava flow extent. Within the map extent, about 1,722 structures and the road about 18 km are potentially affected by the lava flow. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR-UNOSAT.

UNOSAT code: VO20210523COD Cette carte illustre les structures et bâtiments potentiellement impactées par la coulée de lave dans le district de Nyiragongo, province du Nord-Kivu en République Démocratique du Congo suite à l'éruption du volcan Nyiragongo du 22 mai 2021. A partir de l'analyse d'une image radar TerraSAR-X acquise le 24 mai 2021 à 16:13 UTC, UNITAR-UNOSAT a observé une coulée de lave qui s'est arrêtée à 700m des installations aéroportuaires. Sur l'étendue de l'analyse, environ 1,600 structures sont potentiellement impactées par la coulée de lave à la date d'acquisition de l'image radar. Ceci est une analyse préliminaire et n'a pas encore été validée sur le terrain. Veuillez d'envoyer vos commentaires à UNITAR-UNOSAT. Note: L'analyse de coulée de lave à partir d'une image radar peut surestimer la trace de la coulée de lave à cause du coefficient de rétrodiffusion du signal radar.

UNOSAT code: VO20210523COD This map illustrates potentially affected structures and buildings in Nyiragongo district, Nord-Kivu province, DR Congo as detected by satellite image acquired after the eruption of Mount Nyiragongo volcano on 22 May 2021. UNITAR-UNOSAT analysis used a TerraSAR-X image acquired on 24 May 2021, at 16:13 UTC, to observe the lava flow. Within the analysis extent, about 1,600 structures are potentially affected by the lava flow. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR-UNOSAT. Important Note: Lava flow analysis from radar images may overestimate the presence of the lava tract due to the backscattering properties of the radar signal.

UNOSAT code: VO20220115TON This map illustrates the impact of the Hunga Tonga-hunga Ha'apai volcanic eruption and the subsequent tsunami in 'Ohonoua town ('Eua Prope district, Tonga) and damage assessment as detected from Pleiades images acquired on 20 January 2022 at 11:20 local time and 21 January 2022 at 11:13 local time. Among the 2,028 structures were identified, of which 1,231 structures are in cloud-free areas. Amongst the analyzed 1,231 structures, 54 were identified as damaged or destroyed, three as potentially damaged structures, and 1,174 buildings appeared without any visible damage from space imagery analysis. Six road obstacles were also identified in the cloud-free areas. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to the United Nations Satellite Centre (UNOSAT).

UNOSAT code: VO20220115TON This map illustrates the impact of the Hunga Tonga-hunga Ha'apai volcanic eruption and the subsequent tsunami in Fonoifua island located at 110 km NE of Nuku'alofa and also the building damage assessment as detected from a Pleaides image acquired on 20 January 2022, 12:43 local time. In this island, UNOSAT identified 30 structures as damaged and/or destroyed and 7 structures as potentially damaged. The entire island appears to be covered with ashes. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR-UNOSAT.

UNOSAT code: VO20220115TON This map illustrates the impact of the Hunga Tonga-hunga Ha'apai volcanic eruption and the subsequent in Nomuka island (Mu'omu'a district, Tonga) and damage assessment as detected from a Pleiades image acquired on 18 January 2022, 10:45 local time. In this island, UNOSAT identified 260 structures. 52 structures were identified as damaged and/or destroyed, 13 as potentially flooded and almost all the structures were covered with ash. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR-UNOSAT.

UNOSAT code: VO20220115TON This map illustrates effects of the Hunga Tonga-hunga Ha'apai volcanic eruption and the subsequent tsunami in Mango island (Mu'omu'a district, Tonga) and damage assessment as detected from a Kompsat-3 image acquired on 18 January 2022, 14:22 local time. In this island, UNOSAT identified 26 structures as damaged and/or destroyed and 1 structure as potentially damaged. The entire island appears to be covered with ashes. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR-UNOSAT.

UNOSAT code: VO20220115TON This map illustrates impact of the Hunga Tonga-hunga Ha'apai volcanic eruption and subsequent tsunami in the Atata island (Kolovao district, Tonga) and the related damage assessment as detected from a Pleiades image acquired on 18 January 2022, 19:45 local time. Within this island, UNOSAT identified 72 structures as damaged, 28 structures as potentially damaged. Furthermore, the entire island appears to be covered with volcanic ash. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to the United Nations Satellite Centre (UNOSAT).

UNOSAT code: VO20220115TON This map illustrates effects of the Hunga Tonga-hunga Ha'apai volcanic eruption in Nomuka island (Mu'omu'a district, Tonga) and damage assessment as detected from a Pleiades image acquired on 17 January 2022, 10:53 local time. In this island we identified~250 structures. 104 structures were analyzed in the cloud-free area and 41 structures were identified as damaged and almost all the structures were covered with ash. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR-UNOSAT.

Este mapa ilustra una estimación del número de viviendas y estructuras potencialmente afectadas por el flujo piroclástico detectado por Copernicus EMS, usando una imagen satélite Sentinel-2 colectada el 4 de junio 2018. UNITAR-UNOSAT ha estimado un total de 411 viviendas / estructuras que se encuentran dentro del área afectada por el flujo piroclástico; de las cuales 260 pertenecen a la aldea de San Miguel de Los Lotes. Complejos industriales y hoteleros como el de La Reunión se encuentran también dentro de la extensión del flujo piroclástico. Este análisis es preliminar y no ha sido validado en terreno. Por favor, envíen sus comentarios a UNITAR-UNOSAT.

This map illustrates an estimation of the number of buildings potentially affected by pyroclastic flow detected by Copernicus EMS using a Sentinel-2 satellite image collected on 4 June 2018. UNITAR-UNOSAT estimates 411 buildings / structures within the pyroclastic flow, ~ 260 of which are located inside the community of San Miguel de Los Lotes. Industrial sites and the resort of La Reunion are also included in the extent of this pyroclastic flow. This is a preliminary analysis and has not yet been validated in the field. Please send ground feedback to UNITAR - UNOSAT.

This map illustrates areas affected by Pico de Fogo volcano as seen in a WorldView-2 image acquired 25 November 2014 and LANDSAT-8 data acquired the 24 of November. The lava flow is continuing from the subsidiary vent located in the western flank of the Pico de Fogo Mountain and magma and the lava reached the areas close to Portela, Cha Das Caldeiras and Bangaeira villages. About 3400 meters of the main road and 4600 m of secondary roads and paths in the caldera are affected and are potentially out of use (i.e. 8000 m of roadways potentially affected). The inset of this map illustrates the incandescent lava and smoke as seen with false colors as captured by WorldView-2 satellite. ~150 ha of lava could be observed on the 24 November 2014 and ~260 ha the on 25 November 2014. Note that the lava flow is likely underestimated because of smoke especially in the areas close to the vent. This analysis has not yet been validated in the field. Please send ground feedback to UNITAR /UNOSAT.