earthquake

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See: cataclysm
References in periodicals archive ?
In spite of Eginitis's explicit association of tectonic earthquakes with 'seismic centres', however, it is not until 1926 that Evans himself attributed tectonic earthquakes to an 'Aegean centre' in connection with a fixed "zone of instability in the Earth's crust [.
The only difference with tectonic earthquakes, is their pattern of occurrence.
Such threats included acts of bioterrorism, nuclear calamities and/or nuclear warfare, overpopulation, asteroid and meteor threats, super volcanoes, mass tectonic earthquakes, rogue self-replicating nano-machines, superintelligent computers and high-energy chain-reactions that could disrupt the fabric of space itself.