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Dive into the research topics where Jairo Francisco Savian is active.

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Featured researches published by Jairo Francisco Savian.


Revista Brasileira de Geofísica | 2007

Positive and negative sudden impulses caused by fast forward and reverse interplanetary shocks

Vânia Fátima Andrioli; Ezequiel Echer; Jairo Francisco Savian; Nelson Jorge Schuch

Fast forward interplanetary shocks (FFS) are characterized by positive jump in all interplanetary plasma parameters (solar wind speed, temperature and density) and interplanetary magnetic field. However the fast reverse interplanetary shocks (FRS) are characterized by negative jump in all mentioned parameters except solar wind speed. Observations show that FFS cause positive sudden impulses (SI) while FRS cause negative SI in the H-component of the geomagnetic field. In this work we investigate the SI caused by interplanetary shocks. We use the observed plasma parameters, upstream and downstream, to calculate the variation of dynamic pressure. We observe that the SI amplitude is larger for positive SI than for negative ones, as a consequence of the fact that FFS have larger dynamic pressure variations as compared to FRS.


Revista Brasileira de Geofísica | 2007

Analysis of geomagnetic storm variations and count-rate of cosmic ray muons recorded at the Brazilian southern space observatory

Everton Frigo; Jairo Francisco Savian; Marlos da Silva; Alisson Dal Lago; Nalin Babulal Trivedi; Nelson Jorge Schuch

An analysis of geomagnetic storm variations and the count rate of cosmic ray muons recorded at the Brazilian Southern Space Observatory - OES/CRS/INPE-MCT, in SMartinho da Serra, RS during the month of November 2004, is presented in this paper. The geomagnetic measurements are done by a three component low noise fluxgate magnetometer and the count rates of cosmic ray muons are recorded by a Muon Scintilator Telescope - MST, both instruments installed at the Observatory. The fluxgate magnetometer measures variations in the three orthogonal components of Earth magnetic field, H (North-South), D (East-West) and Z (Vertical), with data sampling rate of 0.5 Hz. The Muon Scintilator Telescope records hourly count rates. The arrival of a solar disturbance can be identified by observing the decrease in the muon count rate. The goal of this work is to describe the physical morphology and phenomenology observed during the geomagnetic storm of November 2004, using the H component of the geomagnetic field and vertical channel V of the multi-directional muon detector in South of Brazil.


Revista Brasileira de Geofísica | 2007

Forbush decreases on November 6-12, 2004 observed by the Muon Detector Network

Jairo Francisco Savian; Marlos da Silva; Alisson Dal Lago; Ezequiel Echer; Luis Eduardo Antunes Vieira; K. Munakata; Walter D. Gonzalez; Nelson Jorge Schuch


Archive | 2008

Technical aspects and analysis of the cosmic ray modulation effects during geomagnetic storms

Carlos Roberto Braga; Nelson Jorge Schuch; Samuel Martins da Silva; Nikolas Kemmerich; Marcos Vinicius Dias Silveira; Fabricio Deives Kummer; Alisson Dal Lago; Marlos da Silva; K. Munakata; Takao Kuwabara; Chihiro Kato; John W. Bieber; Jairo Francisco Savian


10th International Congress of the Brazilian Geophysical Society & EXPOGEF 2007, Rio de Janeiro, Brazil, 19-23 November 2007 | 2007

Analysis of the Mercury's bow shock properties during Mariner-10 encounters

Samuel Martins da Silva; Carlos Roberto Braga; Nelson Jorge Schuch; Jairo Francisco Savian; Ezequiel Echer; Fernando L. Guarnieri


Archive | 2006

Cosmic ray modulation and noise level on the extended multidirectional muons detector telescope installed in south of Brazil: preliminary analysis

Carlos Roberto Braga; Jairo Francisco Savian; Marcos da Silva; S. M. da Silva; C. W. da Silva; Alisson Dal Lago; T. Kuwabara; K. Munakata; John W. Bieber; Nelson Jorge Schuch


Archive | 2006

Analysis of the three intense geomagnetic storm observed on july 20-31, 2004: solar, interplanetary and cosmic ray effects near the Earth.

Jairo Francisco Savian; Marcos da Silva; Alisson Dal Lago; Carlos Roberto Braga; C. W. da Silva; L. C. dos Santos; S. M. da Silva; K. Munakata; T. Kuwabara; Nelson Jorge Schuch


Revista Brasileira de Geofísica | 2005

Análise de tempestades geomagnéticas super intensas e de estruturas do meio interplanetário relacionadas, através da observação de raios cósmicos de superfície de alta energia

Jairo Francisco Savian; Marlos da Silva; Alisson Dal Lago; K. Munakata; Walter D. Gonzalez; Nelson Jorge Schuch


9th International Congress of the Brazilian Geophysical Society & EXPOGEF, Salvador, Bahia, Brazil, 11-14 September 2005 | 2005

Forbush decreases in November 6-20, 2004 observed by the Muon Detector Network

Jairo Francisco Savian; Marlos da Silva; Vânia Fátima Andrioli; Alisson Dal Lago; Ezequiel Echer; Luis Eduardo Antunes Vieira; K. Munakata; G. I. Pugacheva; John W. Bieber; Walter Demetrio Gonzalez Alarcon; Nelson Jorge Schuch


9th International Congress of the Brazilian Geophysical Society & EXPOGEF, Salvador, Bahia, Brazil, 11-14 September 2005 | 2005

Um estudo sobre as ondas de choque no meio interplanetário

Vânia Fátima Andrioli; Jairo Francisco Savian; Ezequiel Echer; Nelson Jorge Schuch

Collaboration


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Nelson Jorge Schuch

National Institute for Space Research

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Alisson Dal Lago

National Institute for Space Research

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Marlos da Silva

National Institute for Space Research

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Ezequiel Echer

National Institute for Space Research

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Vânia Fátima Andrioli

Universidade Federal de Santa Maria

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Carlos Roberto Braga

National Institute for Space Research

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Luis Eduardo Antunes Vieira

National Institute for Space Research

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Walter D. Gonzalez

National Institute for Space Research

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