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Common toads appear to be able to sense an impending earthquake and will flee their colony days before the seismic activity strikes. ... It is hard to objectively and quantifiably study how animals respond to seismic activity, in part because earthquakes are rare and unpredictable.

2010-03-31

 toad frog earthquake frequency prediction seismology
The Schumann resonances (SR) are a set of spectrum peaks in the extremely low frequency (ELF) portion of the Earth's electromagnetic field spectrum. Schumann resonances are global electromagnetic resonances, excited by lightning discharges in the cavity formed by the Earth's surface and the ionosphere...
 resonance Earth planet low lightning global frequency vibration Wikipedia