Rudolf Hoernes

Rudolf Franz Moriz Hoernes (7 October 1850 – 20 August 1912) was an Austrian geologist, who taught at the University of 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. Along with his "uncle" Eduard Suess, he was a major influence on academic geology in Austria.