Gyirong–Rasuwagadhi 2026 debris flood satellite comparison

Current place

Glacier collapse source

Dated event-wide facts below are not losses at the selected place.

08:37 NPTUSGS us7000tbwb: reviewed landslide signal, not a tectonic earthquake

3 October reportNDRRMA total field: 1,455, including partial remains; categories sum to 1,454, an unexplained difference of one. Missing: 5,285, including 636 foreigners, after deducting 112 identified bodies. Not a final or verified distinct-person count. Source and definitions

1 × 2 × 1.2 kmHidenori Watanave’s collapse envelope near the glacier snout, not an ice-volume estimate

~20 km²UNOSAT mudflow extent within its Rasuwa analysis area; not field-verified

Remains pieces and unresolved register discrepancies are not a count of distinct people. Missing does not mean dead. Nepal and Tibet figures are not added together. View source-area follow-up imagery.

Gyirong–Rasuwagadhi debris flood: satellite before and after

USGS us7000tbwb records a reviewed M5.2 landslide signal on 26 August 2026, not a tectonic earthquake. Debris followed Lhende Khola past Gyirong Port and Rasuwagadhi into the Bhote Koshi–Trishuli valley. Search 26 dated image comparisons, view four separate September–October source-area observations, or read the ICIMOD October preliminary synthesis guide. NDRRMA’s report through 3 October lists 1,455 in its total field, including partial remains; categories sum to 1,454, leaving a difference of one. It lists 5,285 missing. These are not final or verified distinct-person counts. Official language versions, the discrepancy and older snapshots remain available. Tibet’s separate 5 September 18:00 CST snapshot is 43 dead and 519 missing; the two sides are not added together. This is an independent reconstruction, not a live warning or an official Watanave Lab site.

3D post-event overlay

Before basemap

Terrain exaggeration

How to find newer satellite scenes

Planet Crisis Response STAC: post-event PlanetScope, SkySat and Pelican under CC-BY-NC. Pelican’s 1 September 05:06 UTC repeat of the 27 August swath has about 47% cloud in its north frame; Rasuwagadhi is clearer. Its east edge is near 85.436°E, short of the glacier snout, and there are no 3D tiles. Find it in the filmstrip as pelican-0901-border.

Copernicus Browser: the source comparison remains the cloudy 27 August Sentinel-2 scene. Downstream 45RUL on 20 September has about 16% cloud over Betrawati; 45RTL on 21 September has about 13% cloud over Galchhi. Attribute Copernicus.

USGS EarthExplorer: Landsat 9 path/row 141/040. Scenes from 3 and 11 September are cloudier than 26 August, so they are not substituted here.

Vantor / HOT OpenAerialMap: roughly 30 cm imagery under CC-BY-NC. The default 3D overlay from Gyirong through Syabrubesi uses 7 September LG03 (about 18% cloud), which does not reach 85.527°E. The 18 September LG06 footprint covers the glacier snout, but no tile service was published for it; the source view still uses PlanetScope and GeoEye-1. Older 2021 and 27–28 August tiles remain available.

Wikimedia Commons: the Gyirong Port high-resolution before/after comparison in this filmstrip was uploaded on 28 August.

International Charter / ISRO NRSC: a Resourcesat-2A overview compares 4 April with 26 August.

The original 3D story was made by Hidenori Watanave’s laboratory at the University of Tokyo, with Planet Labs PBC, Landsat and Vantor credits. This site is an independent, non-commercial public-data reconstruction, not an official mirror. Planet and Vantor images retain their CC-BY-NC terms.