Refinement of parameters gravitational anomaly relative to the focal zone of the 2011 earthquake (Japan) based on satellite dataTatyana Rubleva, Konstantin Simonov, Valentin Kashkin, Anna Malkanova and Roman OdintsovE3S Web Conf., 333 (2021) 02011DOI: https://doi.org/10.1051/e3sconf/202133302011