Fracking isn’t the only human activity that involves pumping water through rocks. Steam produced by geothermally heated water is an alternative energy source meant to help free us from burning fossil fuels.
Last week, two scientific papers were published that raised the possibility of a geothermal plant in South Korea causing or at least contributing to an unusual strong earthquake.
This video is in Korean but pictures are worth a thousand words. The situation is well-explained in English here.
Featured image: Source, CC BY-SA 3.0.