Zobrazeno 1 - 10
of 114
pro vyhledávání: '"Ashour, A"'
Autor:
Maha Ashour-Abdalla, Mostafa El-Alaoui, Raymond J. Walker, Jean Berchem, Giovanni Lapenta, Meng Zhou, Haoming Liang, Melvyn L. Goldstein
Publikováno v:
Geophysical Research Letters. 43:6005-6011
A historic challenge to understanding geomagnetic activity is determining where in Earth's magnetotail magnetic energy is converted into particle energy and heat by magnetic reconnection. Key to unravel this fundamental process is in determining the
Autor:
Benoit Lavraud, P. A. Lindqvist, Paul Cassak, Julia E. Stawarz, John C. Dorelli, Levon A. Avanov, David M. Malaspina, James L. Burch, K. A. Goodrich, Christopher T. Russell, O. Le Contel, Martin V. Goldman, Yuri V. Khotyaintsev, Steven J. Schwartz, T. D. Phan, Matthew R. Argall, Mats André, L. J. Chen, Roy B. Torbert, Maha Ashour-Abdalla, Robert J. Strangeway, Michael Shay, Barbara L. Giles, Alessandro Retinò, Rumi Nakamura, Frederick Wilder, David Newman, Craig J. Pollock, A. P. Sturner, Maria Usanova, Michael Hesse, James Drake, Marit Øieroset, Justin Holmes, Robert E. Ergun, Jonathan Eastwood, Stefan Eriksson, Meng Zhou
Publikováno v:
Geophysical Research Letters. 43:5626-5634
We report observations from the Magnetospheric Multiscale satellites of large-amplitude, parallel, electrostatic waves associated with magnetic reconnection at the Earth's magnetopause. The observe ...
Publikováno v:
Geophysical Research Letters. 43:515-524
Ion heating during a substorm on 15 February 2008, starting at 0348 UT, is studied with a new approach recently described in Ashour-Abdalla et al. (2015). The general conditions of the magnetotail are obtained from a global magnetohydrodynamic (MHD)
Publikováno v:
Geophysical Research Letters. 41:5717-5726
Ion energization in the magnetotail during substorms is examined by simulating a modest substorm event that occurred on 7 February 2009. The simulation scheme combines global magnetohydrodynamic (MHD) modeling of the magnetosphere driven by realistic
Autor:
Robert L. Richard, Raymond J. Walker, Mostafa El Alaoui, Maha Ashour-Abdalla, Melvyn L. Goldstein, Meng Zhou, David Schriver, Eric Donovan
Publikováno v:
Geophysical Research Letters. 40:3787-3792
[1] In this study, we examine the causes of electron precipitation during a substorm on 15 February 2008 that lead to auroral brightening. We use global kinetic simulations along with spacecraft and ground-based data. We find ~keV electrons in the re
Autor:
Maha Ashour-Abdalla, Mostafa El-Alaoui, L. A. Frank, Raymond J. Walker, William R. Paterson, Lev Zelenyi, Vahé Peroomian
Publikováno v:
Geophysical Research Letters. 26:3545-3548
This study uses observations from the Wind, Geotail and Interball spacecraft together with global MHD simulation to investigate the onset of a substorm on Dec. 22, 1996. At 1240 UT, during the growth phase, a small localized neutral line formed in th
Autor:
L. A. Frank, Mostafa El-Alaoui, R. J. Walker, Maha Ashour-Abdalla, William R. Paterson, Vahé Peroomian, Joachim Raeder
Publikováno v:
Geophysical Research Letters. 26:955-958
This study employs Geotail plasma observations and numerical modeling to determine sources of the ions observed in the near-Earth magnetotail near midnight during a substorm. The growth phase has the low-latitude boundary layer as its most important
Publikováno v:
Geophysical Research Letters. 25:2609-2612
This study examines the mode conversion from electrostatic to electromagnetic waves near the plasma frequency in the Earth's electron foreshock. The conversion and reflection coefficients are obtained by solving coupled differential equations in a we
Autor:
Tadashi Yamamoto, L. A. Frank, Lev Zelenyi, R. P. Lepping, Jean-Michel Bosqued, R. J. Walker, Mostafa El-Alaoui, Maha Ashour-Abdalla, Vahé Peroomian, K. W. Ogilvie, William R. Paterson, Joachim Raeder, Robert L. Richard, Susumu Kokubun
Publikováno v:
Geophysical Research Letters. 24:955-958
This study investigates the sources of the ions up the complex and nonisotropic H(+) velocity distribution functions observed by the Geotail spacecraft on May 23, 1995, in the near-Earth magnetotail region and recently reported by Frank et al. [1996]
Autor:
Joachim Raeder, L. A. Frank, Maha Ashour-Abdalla, William R. Paterson, Susumu Kokubun, James A. Slavin, Jean Berchem, K. L. Ackerson, Tadashi Yamamoto
Publikováno v:
Geophysical Research Letters. 24:951-954
We present Geotail plasma and field observations from the middle magnetotail near X(sub GSE) = -46 R(sub E) for the time period 1400 to 1800 UT on December 14, 1994. During that period, the Wind satellite monitored the solar wind plasma and interplan