"2007-09-20T09:39:34Z"^^ . "2007-09-20T09:39:34Z"^^ . "The phenomenon called tsunami is a series of waves of extremely long wave length and long period, generated in a body of water by an impulsive disturbance that displaces the water such as an earthquake, landslide, or sub-marine volcanic eruption. -\nSource: http://www.pdc.org/tsunami-definition.php"@en .