The Japan M9.0 earthquake and the succeeding tsunami are healthy authenticated by videos, photographs, sea-level measurements, seismograms etcetera But how do we recognise such that vast events if they happened some thousands of years ago? If there’s no historical news we would use seism state of affairs issue (EEE) for characterizing the hoo-ha and paleoseismicity.
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Effects of Earthquakes
Surface trembling from seismic waves often damages buildings. Depending on the hardship of the earthquake, gas mains may break, starting numerous fires. Foreshocks, small earthquakes that sometimes precede the main earthquake, can be used as a warning system that a astronomic shock may be on the way.