Small earthquakes caused by migrating gasses in the underground

by GFZ GeoForschungsZentrum Potsdam, Helmholtz Centre, May 1, 2018 in ScienceDaily

The metropolitan area of Istanbul with around 15 million inhabitants is considered to be particularly earthquake-prone. In order to be able to assess the risk correctly, researchers must decipher the processes underground. Below the Marmara Sea, an international research team detected earthquakes that were not directly caused by tectonic stresses but by rising natural gas.