Near- and far-field tsunamigenic effects on the Z component of the geomagnetic field during the Japanese event, 2011

Autor(es)

Klausner, Virginia ^[1] ; Kherani, Esfhan A. ^[2] ; Muella, Marcio T. A. H. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Vale Paraiba UNIVAP, Dept Phys & Astron, Sao Jose Dos Campos - Brazil

^[2] Natl Inst Space Res, Sao Jose Dos Campos - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS; v. 121, n. 2, p. 1772-1779, FEB 2016.
• Citações Web of Science: 4

Resumo

In this work, we examine the vertical component (Z) of the geomagnetic field observed by ground-based observatories during the tsunami event which happened on 11 March 2011. For this event, we have selected nine magnetic observatories distributed along the tsunami passage, covering up to 3000km epicentral distance. The traveltime diagram of the magnetic disturbances is constructed and compared with the simulated tsunami traveltime diagram. From this comparison, we identify the amplified magnetic disturbances appearing during the tsunami arrival in the vicinity of these observatories. Moreover, mean absolute percentage error map is constructed to examine the cross correlations among different observatories and the amplified disturbances are found to be highly correlated. These features suggest that the amplified disturbances are tsunamigenic in nature. These results are in confirmation with the previous near-field studies, and they shed new insight into the tsunamigenic magnetic disturbances on near- and far-field distances from the epicenter. (AU)

• Processo FAPESP: 13/06029-0 - Técnicas wavelet aplicadas ao estudo de fenômenos eletrodinâmicos espaciais
• Beneficiário: Virginia Klausner de Oliveira
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 11/21903-3 - Distúrbios ionosféricos viajantes: simulação e observação, a importância de latitudinal de acoplamento de ondas gravidade-instabilidades Perkins-Es-layer e de forçando desde a pré-sísmica eventos
• Beneficiário: Esfhan Alam Kherani
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 11/20588-7 - Estudo das variações geomagnéticas usando técnicas wavelet.
• Beneficiário: Virginia Klausner de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado