He patented the basic ideas leading to reflection seismology, a technique important for its use in exploring for petroleum.
en.wikipedia.org Research in natural sciences includes geodesy, glaciology, limnology, geomagnetism, geology, biology, meteorology, seismology, and other areas of expertise.
en.wikipedia.org Topics covered by experiments performed included soil mechanics, meteoroids, seismology, heat flow, lunar ranging, magnetic fields, and solar wind.
en.wikipedia.org He is best known for his works on the theory of relativity and seismology.
en.wikipedia.org