Whenobserving energy level of a chaoticsystemchangingwithoneof the parameter, there are manyavoided crossing, whichpossiblyisanimportantsignof quantum chaos.
These include the international seismic monitoring network, the international array of sea level measuring stations (the Global Sea LevelObservingSystem, the Global Telecommunication System of the World Meteorological Organization and associated public geostationary satellites) and the internet.