Zobrazeno 1 - 10
of 93
pro vyhledávání: '"Oliveira, Denny M."'
Autor:
Hayakawa, Hisashi, Ebihara, Yusuke, Mishev, Alexander, Koldobskiy, Sergey, Kusano, Kanya, Bechet, Sabrina, Yashiro, Seiji, Iwai, Kazumasa, Shinbori, Atsuki, Mursula, Kalevi, Miyake, Fusa, Shiota, Daikou, Silveira, Marcos V. D., Stuart, Robert, Oliveira, Denny M., Akiyama, Sachiko, Ohnishi, Kouji, Miyoshi, Yoshizumi
In May 2024, the scientific community observed intense solar eruptions that resulted in an extreme geomagnetic storm and auroral extension, highlighting the need to document and quantify these events. This study mainly focuses on their quantification
Externí odkaz:
http://arxiv.org/abs/2407.07665
Publikováno v:
Frontiers in Astronomy and Space Science (2024)
The impact of interplanetary (IP) shocks on the Earth's magnetosphere can greatly disturb the geomagnetic field and electric currents in the magnetosphere-ionosphere system. At high latitudes, the current systems most affected by the shocks are the a
Externí odkaz:
http://arxiv.org/abs/2405.04647
Autor:
Oliveira, Denny M.
In this manuscript, I provide an updated interplanetary shock data base I published in previous works. This list has now 603 events. I also present and describe the data and methodologies used to compile this list. The main contribution of this work
Externí odkaz:
http://arxiv.org/abs/2308.11125
Autor:
Oliveira, Denny M.
Interplanetary (IP) shocks are disturbances commonly observed in the solar wind. IP shock impacts can cause a myriad of space weather effects in the Earth's magnetopause, inner magnetosphere, ionosphere, thermosphere, and ground magnetic field. The s
Externí odkaz:
http://arxiv.org/abs/2304.08254
Autor:
Oliveira, Denny M., Weygand, James M., Zesta, Eftyhia, Ngwira, Chigomezyo M., Hartinger, Michael D., Xu, Zhonghua, Giles, Barbara L., Gershman, Dan J., Silveira, Marcos V. D., Souza, Vitor M.
Publikováno v:
Published in Space Weather, 2021
The impact of interplanetary shocks on the magnetosphere can trigger magnetic substorms that intensify auroral electrojet currents. These currents enhance ground magnetic field perturbations (d$B$/d$t$), which in turn generate geomagnetically induced
Externí odkaz:
http://arxiv.org/abs/2112.00215
Autor:
Oliveira, Denny M., Zesta, Eftyhia, Mehta, Piyush M., Licata, Richard J., Pilinski, Marcin D., Tobiska, W. Kent, Hayakawa, Hisashi
Publikováno v:
Published in Frontiers in Astronomy and Space Sciences (2021)
Satellites, crewed spacecraft and stations in low-Earth orbit (LEO) are very sensitive to atmospheric drag. A satellite's lifetime and orbital tracking become increasingly inaccurate or uncertain during magnetic storms. Given the planned increase of
Externí odkaz:
http://arxiv.org/abs/2110.04360
Autor:
Bhaskar, Ankush, Sibeck, David, Kanekal, Shrikanth G., Singer, Howard J., Reeves, Geoffrey, Oliveira, Denny M., Kang, Suk-Bin, Komar, Colin
Fast reverse shocks (FRSs) cause the magnetosphere to expand, by contrast to the well-known compressions caused by the impact of fast forward shocks (FFS). Usually, FFSs are more geoeffective than FRSs, and consequently, the inner magnetosphere dynam
Externí odkaz:
http://arxiv.org/abs/2012.01389
Autor:
Hayakawa, Hisashi, Blake, Sean P., Bhaskar, Ankush, Hattori, Kentaro, Oliveira, Denny M., Ebihara, Yusuke
Publikováno v:
The Astrophysical Journal, 2020
Given the infrequency of extreme geomagnetic storms, it is significant to note the concentration of three extreme geomagnetic storms in 1941, whose intensities ranked fourth, twelfth, and fifth within the aa index between 1868-2010. Among them, the g
Externí odkaz:
http://arxiv.org/abs/2010.00452
Publikováno v:
Space Weather, 2020
Understanding extreme space weather events is of paramount importance in efforts to protect technological systems in space and on the ground. Particularly in the thermosphere, the subsequent extreme magnetic storms can pose serious threats to low-Ear
Externí odkaz:
http://arxiv.org/abs/2007.13892
Publikováno v:
Earth, Planets and Space (2020), special issue "Solar-Terrestrial Environment Prediction: Toward the Synergy of Science and Forecasting Operation of Space Weather and Space Climate"
Being footprints of major magnetic storms and hence major solar eruptions, mid- to low-latitude aurorae have been one of the pathways to understand solar-terrestrial environments. However, it has been reported that aurorae are also occasionally obser
Externí odkaz:
http://arxiv.org/abs/2005.13453