Birashoboka ko bitagaragarira amaso ko amasaha y’umunsi yiyongereye ariko abahanga mu by’ubumenyi n’imiterere y’isi (Geophysique) barabyemeza ko ubu umunsi utakireshya nk`uko wareshyaga. Ibi ni nyuma y’umutingito wabereye mu gihugu cy’Ubuyapani. Uriya mutingito wagize ingaruka ku bintu byinshi cyane: inkombe z’inyanja zarahindutse, ibirwa bimwe na bimwe birazimira, ubutaka busa n’ubwimutse bugana mu gice cya ruguru cy’Isi (Hemisphere Nord). Ku buryo ubungubu igihe Isi yamaraga yizenguruka (rotation) kiyongereyeho amasegonda 0.000 006 (imibare ya Nasa . Iki gihe ni gito ariko gishobora kuzagira ingaruka nko guhinduka kwa kalendari, amasaha n’ibindi.