Скачать или смотреть Mt St Helens, Johnston Ridge, Site Of 2023 Debris Flow, Slope and Aerial Imagery Draped On DEM v.1

Version 3 of this video    • Mt St Helens, Johnston Ridge, 2023 Debris ...   shows 10-meters/px mapping of the debris-slide from Sentinel-2 panchromatic image of May 17, 2003.

Mount Saint Helens, Johnston Ridge Observatory, site of the May 14, 2023 debris flow that damaged the access road and infrastructure. Slope map (00:10) and aerial imagery (03:08) draped on 1-meter bare earth lidar USGS_OPR_WA_FEMAHQ_2018_D18_be .
Location: 46.280650, -122.190584
The debris flow is associated with a strong thermal anomaly (06:24) seen in the NWS climate plot. Rendered in QGIS and Shotcut.

Data sources:
USGS 3DEP, OPR lidar: https://apps.nationalmap.gov/downloader/
Aerial imagery USDA NAIP: WMTS
NOAA, NWS Climate Plot, Troutdale, OR (52 miles, 84 kilometers south of the debris flow):
https://www.weather.gov/pqr/cliplot

See also:
Thermal anomaly associated with May 14 debris flow at MSH:
https://earthobservatory.nasa.gov/ima...

The debris flow is visible on 30-m ESA Sentinel 2 satellite IR imagery on May 17, the dark spot at screen center. Decrement the date to see snow cover (blue) on earlier images :
https://apps.sentinel-hub.com/eo-brow...

National Operational Hydrologic Remote Sensing Center
Modeled Snow Water Equivalent for 2023 May 1, 2:00 UTC
Shows ~25 inches of snow at the debris-slide, ~15 inches on May 14:
https://www.nohrsc.noaa.gov/interacti...