10 August 2020

Rajmala: a deadly landslide in Kerala, India

Posted by Dave Petley

Rajmala: a deadly landslide in Kerala, India

Please see an update on this landslide, now termed the Pettimudi landslide, here.

On Thursday 6 August 2020 a large landslide occurred at Rajmala near to Munnar, Kerala in western India.  The landslide, which was triggered by the same spell of intense monsoon rainfall that was a factor in the Air India Express airliner accident on the same day, struck the accommodation of workers from a tea estate.  At the time of writing, 43 bodies have been recovered from the site.  Reports suggest that a further 28 people are likely to be missing, giving a total toll of 71 people, although there is always considerable uncertainty.

So far I have found little information about the specifics of the landslide, and images that provide a decent oversight are difficult to obtain.  The best I have found to date is this one, from India Life and Times:-

The Rajmala landslide in Kerala, India

The Rajmala landslide in Kerala, India. Image from India Life and Times.

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This appears to be a large, flow type slide in highly weathered soil. although better images are needed to understand it properly.

This is the largest landslide in India so far in the 2020 monsoon, although there are several weeks of rain to come yet.  Large landslides in Kerala have happened previously.  On the same day in 2019 a large landslide occurred at Kavalaparra in Kerala, killing 59 people.

Please see an update on this landslide, now termed the Pettimudi landslide, here.

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Quickslide 1: another deadly landslide in South Korea

On Friday 7 August 2020 another large, mobile landslide struck South Korea.  On this occasion the landslide was located in Gokseong County, South Jeolla, killing five people.  Korea JooAng Daily has a good image of the landslide:-

The landslide in Gokseong County, in South Korea

The landslide in Gokseong County, in South Korea on Friday 7 August 2020, which killed five people. Image from Korea JooAng Daily.

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A tropical cyclone is expected to bring more heavy rainfall today.

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Quickslide 2: a seismically-induced rockslide in the Sawtooth Mountains in Idaho

Yahoo has news of a seismically-induced rockslide in the Sawtooth Mountains in Idaho on 7 AugustThe video is cool, although I recommend sound off (for the sake of those around you and for your own sanity):-