quake lakes 34 28 7.9 large landslides quake lakes 34 Entire villages
What formed behind blockages? How many quake lakes formed? How many of the lakes were a danger to people? What was the magnitude of the Sichuan earthquake? What blocked many of the area's rivers? What formed behind the blocked rivers? By May 27, how many earthquake lakes had formed up behind landslide debris? What had to be evacuated due to potential flooding?
As a result of the magnitude 7.9 earthquake and the many strong aftershocks, many rivers became blocked by large landslides, which resulted in the formation of "quake lakes" behind the blockages; these massive amounts of water were pooling up at a very high rate behind the natural landslide dams and it was feared that the blockages would eventually crumble under the weight of the ever-increasing water mass, potentially endangering the lives of millions of people living downstream. As of May 27, 2008, 34 lakes had formed due to earthquake debris blocking and damming rivers, and it was estimated that 28 of them were still of potential danger to the local people. Entire villages had to be evacuated because of the resultant flooding.
question: What formed behind blockages?, answer: quake lakes | question: How many quake lakes formed?, answer: 34 | question: How many of the lakes were a danger to people?, answer: 28 | question: What was the magnitude of the Sichuan earthquake?, answer: 7.9 | question: What blocked many of the area's rivers?, answer: large landslides | question: What formed behind the blocked rivers?, answer: quake lakes | question: By May 27, how many earthquake lakes had formed up behind landslide debris?, answer: 34 | question: What had to be evacuated due to potential flooding?, answer: Entire villages