The SE Asian tsunami was caused by one of the largest earthquakes ever recorded.
It had the effect of shortening the day by less than 3
microseconds.
www.jpl.nasa.gov...
Such events are, geologically speaking, quite commonplace. The worst that mother nature can throw at us hit the human race 74,000 years ago when
Mount Toba erupted - the biggest volcanic eruption for a million years. It precipitated a nuclear winter.
And, despite no houses, cars or central heating, we still survived