Ering, the MP from Arunachal East seat in his February 7 letter to the prime minister informed him about the "debris dam" formed in the Yarlung Sangpo belt in China due to a powerful underwater earthquake in November last year.
A copy of the letter was released to the press here.
In the letter, Ering claimed an intense earthquake activity in November last year triggered widespread landslides on the Yarlung-Tsangpo river, 200 kilometre upstream from Tuting in Upper Siang district of Arunachal Prdesh.
"Three natural rockslide dams have formed on the river due to blockage by landslides and debris. It is only a matter of time before the natural dams burst and unleash a severe disaster along the Siang river valley," the Congress MP said in the letter.
He urged the prime minister to take proactive and necessary steps to keep people of the state safe from the imminent danger.