Lava flow extent and affected structures caused by the 22 May 2021 Nyiragongo volcanic eruption in Goma, DR Congo

✦ DISCOVERED BY ORIONAIUnited Nations Satellite Centre (UNOSAT)GeoscienceDemocratic Republic of the Congo
Democratic Republic of the Congo

About this dataset

**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.

Documentation

UNOSAT datasets and maps are produced using a variety of methods. In general, analysts closely review satellite imagery, often comparing two or more images together, and determine notable changes between the images. For damage assessments, refugee or IDP assessments, and similar analyses, these changes are then manually documented in the vector data by the analyst. For flood extractions, landcover mapping and similar analyses, a variety of automated remote sensing techniques are used to extract the relevant information which is then reviewed and revised as necessary by the analyst. In all cases, resulting data is then loaded into a standardized UNOSAT geodatabase and exported asshapefiles for dissemination. This is a preliminary assessment and has not yet been validated in the field. It is important to consider the characteristics of the source imagery used in the analyses when interpreting results. For damage assessments it should be noted that only significant damage to the structural integrity of the buildings analyzed can be seen in imagery, while minor damage such as cracks or holes may not be visible at all. For flood extractions using radar data it is important to note that urban areas and highly vegetated areas may mask the flood signature and result in underestimation of flood waters. Users with specific questions or concerns should contact unosat@unitar.org to seek clarification.

Related datasets

✦ Suggested by OrionAI
Lava flow and affected structures caused by the volcanic eruption of the 22 May 2021 in north of Goma airport, DR Congo

**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.

Geoscience · United Nations Satellite Centre (UNOSAT)
ViewSave
Lava flow and affected structures caused by Nyiragongo volcanic eruption, Nord-Kivu Province, DR Congo

**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.

Buildings and infrastructure · United Nations Satellite Centre (UNOSAT)
ViewSave
Lava flow and affected structures caused by the volcanic eruption of the 22 May 2021 in Kanyanza village, DR Congo

**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.

Geoscience · United Nations Satellite Centre (UNOSAT)
ViewSave
Lava flow and geological information related to the volcanic eruption in DR Congo and Rwanda as of 27 May 2021

**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.

Geoscience · United Nations Satellite Centre (UNOSAT)
ViewSave
Lava flow and geological information in NordKivu Province, DR Congo and Western Province, Rwanda as of 01 June 2021

**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.

Geoscience · United Nations Satellite Centre (UNOSAT)
ViewSave
Coulée de lave et structures affectées suite à l'éruption volcanique du Nyiragongo, Province du Nord-Kivu, RD Congo

**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.

Buildings and infrastructure · United Nations Satellite Centre (UNOSAT)
ViewSave

Indexed by OrionGIS from Humanitarian Data Exchange (HDX). Data is loaded from the publisher's own server when you use it. Permanent link