Majestic Mount Tambora

Sentinel-2 MSI acquired on 23 August 2017 at 02:23:19 UTC
Sentinel-1 CSAR IW acquired on 08 April 2018 at 21:44:45 UTC
Author(s): Sentinel Vision team, VisioTerra, France - svp@visioterra.fr
Keyword(s): Geohazard, climate change, explosive volcano, island, eruption, caldera, crater, subduction, Pacific Ring of fire, Indonesia
Fig. 1 - Sentinel-1 (08.04.2018) - vv,vh,ndi(vh,vv) colour composite - Sumbawa Island borders the Sunda subduction arc.
Tambora eruption in 1815 was heard 2600km away, it caused a worldwide "year without summer".
Fig. 2 - Sentinel-2 (23.08.2017) - 12,11,8 colour composite - At 2850m, Mount Tambora is the island's highest point.
Fig. 3 - S2 - 11,8,2 colour composite - It used to top 4000m before its 1815 eruption removed 150 km3 of material.
Fig. 4 - S2 - 4,3,2 natural colour - As Tambora's summit collapsed, a 6km-wide, 1-km deep caldera formed instead.