hiː ˈɔːlsoʊ dɪvˈaɪzd ɐn ɪmpɹˈuːvd sˈaɪzməɡɹˌæf ænd kɹiːˈeɪɾᵻd ðə fˈiːld ʌv dʒˌɪəlˈɑːdʒɪkəl pɹˈɑːspɛktɪŋ jˈuːzɪŋ smˈɔːl, ˌɑːɹɾɪfˈɪʃəlikɹiːˈeɪɾᵻd ˈɜːθkweɪks.
He also devised an improved seismograph and created the field of geological prospecting using small, artificially-created earthquakes.