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. For the second time, the sign of a tsunami could be measured in Brazil. The waves generated by the Mw 9.0 earthquake in Japan on March 11, 2011,have spread across the Pacific Ocean and through Drake Passage reached the Atlantic Ocean, being recorded by at least three tide gauges. During the 2004 Sumatraevent, the positioning of the tsunami source allowed the waves to propagate almost directly to the South American coast and the signal was recorded at many sites ofthe Argentinian, Uruguayan and Brazilian coast. This time, the path of the waves was much more complex, causing strong signal attenuation and making difficult thedetection of the waves. Nevertheless, the tsunami signal was identified at Arraial do Cabo, RJ, mainly due to the low background noise level. This far-field record wasused to estimate statistical and spectral characteristics of arriving tsunami waves. Keywords: Japan tsunami, signal detection, Brazil. RESUMO. Pela segunda vez, o sinal de um tsunami pode ser registrado no Brasil. As ondas originadas pelo terremoto de magnitude 9,0 ocorrido no Japao, em 11 de marco de 2011, se propagaram atraves do oceano Pacifico e, passando pelo Estreito de Drake, atingiram o oceano Atlântico, sendo registradas por, pelo menos, tres maregrafos. No evento de 2004, a posicao da fonte do tsunami permitiu a propagacao quase direta das ondas ate a costa sul americana e o sinal pode ser registrado emdiversos pontos na Argentina, Uruguai e Brasil. Dessa vez, o caminho das oscilacoes foi bem mais complexo, provocando forte atenuacao do sinal e, assim, dificultandosua deteccao. Apesar disso, foi possivel detectar esse sinal em Arraial do Cabo, RJ, principalmente devido ao baixo nivel de ruido de fundo no registro do nivel do mar. O registro desses dados de campo distante foi utilizado para extrair caracteristicas estatisticas e espectrais dos dados coletados. Palavras-chave: tsunami do Japao, deteccao do sinal, Brasil.

STATISTICAL AND SPECTRAL CHARACTERISTICS OF THE 2011 EAST JAPAN TSUNAMI SIGNAL IN ARRAIAL DO CABO, RJ, BRAZIL