dˈʊɹɹɪŋ hɪz kɚɹˈɪɹ hiː mˌeɪd mˈɛni ˈʌðɚɹ ɪmpˈoːɹtənt kˌɑːntɹɪbjˈuːʃənz, ɹˈaɪɾɪŋ ɐ nˈʌmbɚɹ ʌv saɪəntˈɪfɪk pˈeɪpɚz, ɪŋklˈuːdɪŋ ɐ paɪənˈɪɹɪŋ wˈɜːk ˌɔn hˌaʊ sˈaɪzmɪk wˈeɪvz pɹˈɑːpɐɡˌeɪt θɹuː ðɪ ˈɜːθ.
During his career he made many other important contributions, writing a number of scientific papers, including a pioneering work on how seismic waves propagate through the Earth.