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Potential ash deposit extent by Yasur Volcano, Tanna Island, Vanuatu as of 23 October 2021

The Centre for Humanitarian Data · 2021 Full Details

Full Details

Title
Potential ash deposit extent by Yasur Volcano, Tanna Island, Vanuatu as of 23 October 2021
Description
**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).
Creator
UN Operational Satellite Applications Programme (UNOSAT)
Publisher
The Centre for Humanitarian Data
Temporal Coverage
2021-10-25
Date Issued
2022-02-18
License
http://www.opendefinition.org/licenses/cc-by-sa
Access Rights
Public
Date Added
August 23, 2025
Provenance Statement
The metadata for this resource was last retrieved from Humanitarian Data Exchange on 2025-08-23.

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Cite and Reference

  • Citation
    UN Operational Satellite Applications Programme (UNOSAT) (2022). Potential ash deposit extent by Yasur Volcano, Tanna Island, Vanuatu as of 23 October 2021. The Centre for Humanitarian Data. https://data.humdata.org/dataset/7eb483a0-1013-42f3-baa6-aa60e237376d (dataset)
  • BTAA Geoportal Link

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