The study of global seismicity greatly advanced in the 1960s with the establishment of the Worldwide Standardized Seismograph Network (WWSSN) to monitor the compliance of the 1963 treaty banning above-ground testing of nuclear weapons.
Proučavanje globalne seizmičnosti znatno je napredovalo 1960-ih uspostavom WWSSN-a (Svjetske standardizirane mreže seizmografa) za promatranje poštivanja sporazuma o prestanku nadzemnog testiranja nuklearnog oružja iz 1963.