Tsarin gargadin girgizar kasa ko tsarin gargadin girgizar kasa shi ne tsarin na'urorin gaggawa, seismometers, sadarwa, kwamfutoci, da ƙararrawa waɗanda aka ƙirƙira don sanar da yankunan da ke kusa da wani gagarumin girgizar ƙasa yayin da ake ci gaba. Wannan ba daidai yake da hasashen girgizar ƙasa ba, wanda a halin yanzu ba shi da ikon samar da takamaiman gargaɗin aukuwa. Ana haifar da girgizar ƙasa ta hanyar sakin makamashin da aka adana a lokacin da ake zamewa cikin sauri tare da kuskure . Zamewar tana farawa ne a wani wuri kuma tana ci gaba da nisa daga ma'aunin zafi da sanyio a kowace hanya tare da saman kuskure. Gudun ci gaban wannan hawayen kuskure yana da hankali fiye da, kuma ya bambanta da gudun sakamakon matsa lamba da igiyoyin shear, tare da matsa lamba yana tafiya da sauri fiye da igiyoyin shear. Raƙuman ruwa suna haifar da girgiza ba zato ba tsammani. Sannan Kuma Ragewar igiyoyin ruwa suna haifar da motsi lokaci-lokaci (kimanin 1 Hz) wanda shine mafi ɓarna ga gine-gine, musamman gine-ginen da ke da irin wannan lokacin resonant. Yawanci waɗannan gine-ginen suna da tsayin benaye takwas.