Product ID: 3411 - English
Published: 15 Dec, 2021
GLIDE: VO20211205IDN


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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).
Satellite Data (Post): Pleiades
Imagery Dates: 10&11 December 2021
Resolution: 50 cm
Copyright : CNES (2021), distribution Airbus D&S
Source : Airbus DS
Satellite Data (Pre): Pleiades
Imagery Dates: 24 July 2021
Resolution: 50 cm
Copyright : CNES (2021), distribution Airbus D&S
Source : Airbus DS
Boundary data : Badan Pusat Statistik (BPS Statistics Indonesia)
Road: OpenStreetMap
Populate place: OpenStreetMap
Landcover data: Esri 2020 Land Cover
Lahar extent : National Research and Innovation Agency, Indonesia
Geological data: USAID - USGS Volcano Disaster Assistance Program
Population data: WorldPop 2020
Background: ESRI World Topographic Map
Inset1,2, and 3: Pleiades/11 December 2021
Analysis: United Nations Satellite Centre (UNOSAT)
Production: United Nations Satellite Centre (UNOSAT)