Sea level oscillations at the Buenos Aires province coastal waters were detected as a response to the magnitude 9.3 earthquake centered off the west coast of northern Sumatra (3.307°N, 95.947°E) on December 26, 2004 at 00:59 UTC. The aim of the present work is to report the first description on sea level oscillations in the Buenos Aires continental shelf generated by oceanic seismic activity. Sea level records gathered at three tide gauge stations located at Santa Teresita (36° 32′S, 56° 40′W), Mar del Plata (38° 05′S, 57° 30′W) and Puerto Belgrano (38° 54′S, 62° 06′W) were filtered and analyzed. The first arrival was measured at Mar del Plata (December 27, 2004, 00:15 UTC). At Santa Teresita and Puerto Belgrano, the tsunami reached the coast 33 min and 4.5 h later than at Mar del Plata, respectively. Maximum wave heights observed were 0.27, 0.15 and 0.20 m at Santa Teresita, Mar del Plata and Puerto Belgrano stations, respectively, and wave periods were detected in the range from 20 to 120 min. Wave amplitudes presented a remarkable temporal variability in the period immediately following tsunami wave arrival. After the first arrivals, waves lasted during the first 40 and 54 h at Mar del Plata and Santa Teresita, respectively. Even though, atmospherically forced sea level oscillations (in the tsunami frequency band) are frequently observed at different tide stations at locations on the Buenos Aires province coast, the weather patterns between December 24 and 27, 2004 showed no evidences of either frontal passages or atmospheric gravity waves. Thus sea level perturbations recorded at Santa Teresita, Mar del Plata and Puerto Belgrano stations can certainly be linked to the Indian Ocean tsunami. © 2006 Elsevier Ltd. All rights reserved.
Documento: | Artículo |
Título: | Tide gauge observations of the Indian ocean tsunami, December 26, 2004, in Buenos Aires coastal waters, Argentina |
Autor: | Dragani, W.C.; D'Onofrio, E.E.; Grismeyer, W.; Fiore, M.E. |
Filiación: | Servicio de Hidrografía Naval, ESCM-INUN, Av. Montes de Oca 2124, Ciudad Autonoma de Buenos Aires, Argentina Departamento Ciencias de la Atmósfera y los Océanos, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, (1428) Ciudad Universitaria, Ciudad Autonoma de Buenos Aires, Argentina Instituto de Geodesia, Facultad de Ingeniería, Universidad de Buenos Aires, Av. Las Heras 2214, 1127 Ciudad Autonoma de Buenos Aires, Argentina CONICET, Consejo Nacional Investigaciones Cientificas Tecnicas, Av. Rivadavia, 1917 Ciudad Autonoma de Buenos Aires, Argentina |
Palabras clave: | Buenos Aires continental shelf; Indian ocean earthquake, December 26, 2004; Sea level measurements; Tide gauges; Tsunami; coastal water; continental shelf; oscillation; sea level; Sumatra earthquake 2004; tide gauge; tsunami; wave propagation; Argentina; Asia; Buenos Aires [Argentina]; Eurasia; Greater Sunda Islands; Indian Ocean; Malay Archipelago; South America; Southeast Asia; Sumatra; Sunda Isles |
Año: | 2006 |
Volumen: | 26 |
Número: | 14 |
Página de inicio: | 1543 |
Página de fin: | 1550 |
DOI: | http://dx.doi.org/10.1016/j.csr.2006.03.002 |
Título revista: | Continental Shelf Research |
Título revista abreviado: | Cont. Shelf Res. |
ISSN: | 02784343 |
CODEN: | CSHRD |
Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02784343_v26_n14_p1543_Dragani |