Both body and surface waves are traveling waves; however, large earthquakes can also make the Earth ring like a bell. This ringing is a mixture of normal modes with discrete frequencies and periods of an hour or shorter. Motion caused by a large earthquake can be observed for up to a month after the event.
Carballo comes from the Portuguese word Carvalho, which means Oak. Therefore, this name means the place where the Oaks come from. In Portugal, Carvalho is also the name of a province in the district of Pe acova, within the Carvalho Mountains. In Spain, during the re-conquest years or the Reconquista, the name Carballo was extended from Galicia to the Iberian Peninsula and to the Canary Islands.
nor-val, no-rv-al ] The baby boy name Norval is of Old French origin. Norval is a derivative of the English Norville. Norval is unusual as a baby name for boys. Its usage peaked modestly in 1908 with 0.008% of baby boys being given the name Norval.It ranked at #732 then.The baby name has since experienced a drop in frequency, and is currently of only sporadic use.orval is unusual as a baby name for boys. Its usage peaked modestly in 1908 with 0.008% of baby boys being given the name Norval. It ranked at #732 then. The baby name has since experienced a drop in frequency, and is currently of only sporadic use.