Sindok moved the seat of power of the Mataram kingdom from Central Java to East Java in 929 AD, probably as a result of the eruption of Mount Merapi and/or invasion from Srivijaya.
sˈɪndɑːk mˈuːvd ðə sˈiːt ʌv pˈaʊɚɹ ʌvðə mˈæɾɐɹˌæm kˈɪŋdəm fɹʌm sˈɛntɹəl dʒˈɑːvə tʊ ˈiːst dʒˈɑːvə ɪn nˈaɪnhˈʌndɹɪd twˈɛnti nˈaɪn ˌeɪdˈiː, pɹˈɑːbəbli æz ɐ ɹɪzˈʌlt ʌvðɪ ɪɹˈʌpʃən ʌv mˈaʊnt mˈɛɹæpi ænd slˈæʃ ɔːɹ ɪnvˈeɪʒən fɹʌm sɹˈɪvɪdʒˌeɪə.