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2018-04-26. Second-largest earthquake in modern South Korean history tied to geothermal plant.

posted Apr 30, 2018, 9:55 PM by Alan Gould
By Paul Voosen, Science. For GSS Energy Use chapter 4. Excerpt: There’s a lot to like about geothermal power. Even in regions devoid of natural hot spots, engineers can harvest energy by injecting high-pressure water deep into Earth, where it’s heated by hot granite crust before being pumped back up to heat homes or generate power. That was the goal in Pohang, South Korea, where a $38 million pilot plant sought to bring the carbon-free power source to the country. But that plant, it now appears, brought something else: a large, damaging earthquake. The magnitude-5.5 Pohang earthquake, the second largest in the country’s modern history, struck the densely populated region on 15 November 2017, injuring 90 people and causing $52 million in damage. It crumbled walls, cracked roads, and collapsed old buildings. And, according to two studies published today in Science, it is likely the largest earthquake ever to be triggered by enhanced geothermal power.... http://www.sciencemag.org/news/2018/04/second-largest-earthquake-modern-south-korean-history-tied-geothermal-plant