A large landslide in India, triggered by monsoon rainfall, was captured on a remarkable video.

Image of a landslide partially covered with a transparent sand-colored overlay and the words “The Landslide Blog,” centered, in white

On Monday 29 June 2026, a valley-blocking landsldie occurred on the Siji River in Lower Siang district, Arunachal Pradesh, India. I have yet to track down the precise location of this event, but it is in the region of [27.7146, 94.69135]. The Hindu has a version of this video on its Youtube channel, although this is not the full civerage:-

The full version, which includes the extremely lucky escape of the motorcyclist who was crossing the landslide at the time, is on Facebook. This includes the image below, which shows the blockage of the valley:-

The valley-blocking landslide in Lower Siang, India.
The valley-blocking landslide in Lower Siang, India. Still from a video posted to Facebook by Untold Northeast.

Fortunately, reports indicate that the landslide has already started to release water, so this is unlikely to pose a long term risk. The trigger has been very heavy early monsoon rainfall. But the Google Earth imagery of the area also shows massive disturbance of the slopes in this area from quarrying:-

Google Earth image of the area that was affected by the valley-blocking landslide in Lower Siang, India.
Google Earth image of the area that was affected by the valley-blocking landslide in Lower Siang, India.

Whilst this was the highest profile event, there has been widespread flooding and landslides across Lower Siang, reportedly affecting 3,100 people across 14 communities. Fortunately, to date there have been no reported fatalities.

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