Rudolf Hoernes

Rudolf Hoernes (October 7, 1850 – August 20, 1912) was an Austrian geologist, born in Vienna. He studied under Eduard Suess and became a Professor of geology in Graz. He was known for his earthquake studies in 1878 and proposed a classification of earthquakes into subsidence earthquakes, volcanic earthquakes and tectonic earthquakes. In 1893 he published a detailed textbook on earthquake theory (Erdbebenkunde) from a geological point of view.