Croatian meteorologist and geophysicst born in Volosko (1857-1921). In 1901, Mohorovičić was appointed head on the meteorological service of Croatia and Slavonia. He upgraded the services to European standards, and expanded the work of the observatory into seismology, geomagnetism, and gravitation. Mohorovičić discovered the existence of S and P seismic waves, which propagate through the Earth at different velocities. From seismic refractions, Mohorovičić discovered a discontinuity between the less dense rocks of the crust and denser rocks of the mantle, now called the Mohorovičić discontinuity (known more commonly as the Moho).