Diastrophism yana nufin gurɓatawa a hankali ko nakasar ɓawon ƙasa, wanda za a iya haifar da shi ta hanyoyi daban-daban kamar motsin tectonic, aikin volcanic, da zazzagewa. Wannan zai iya haifar da samuwar tsaunuka, kwaruruka, ramuka, da sauran siffofi na ƙasa. A cikin sassauƙan kalmomi, diastrophism shine tsari na siffata saman duniya ta hanyar ƙarfin yanayi daban-daban na tsawon lokaci.