In general, the more abrupt the onset of slip during an earthquake, the more energetic the radiated high - frequency seismic waves. (sciencedaily.com)
There's a lovely set of fossil tree rings from Chile, a 1229 - year - long period from sometime about 50,000 years ago, which also shows droughts lasting a century, with abrupt onsets and ends. (williamcalvin.com)
But the seemingly abrupt onset of significant ice losses along the southern coast of the Antarctic Peninsula is an eye - opener, suggests Dr. Gardner of JPL. (climatecrocks.com)