Focal mechanism and source determination of the Padang Lawas earthquake april 30, 2020, using moment tensor inversionRetno Agung Prasetyo, Supriyanto Rohadi, Nelly Florida Riama, Yusuf Hadi Perdana, Rahmat Setyo Yuliatmoko, Lewi Ristiyono and Marzuki SinambelaE3S Web Conf., 340 (2022) 01012DOI: https://doi.org/10.1051/e3sconf/202234001012