Zobrazeno 1 - 10
of 131
pro vyhledávání: '"James M. Weygand"'
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 9 (2022)
We have identified nearly 1,000 onsets using two pairs of hemispheric conjugate ground magnetometers where the onset is defined based on a sharp decline in the H component of the magnetic field at a ground magnetometer station. Specifically, we used
Externí odkaz:
https://doaj.org/article/9b4844bfcdbd44dfac8fb5c5c61d67e1
Autor:
Mostafa El-Alaoui, Raymond J. Walker, James M. Weygand, Giovanni Lapenta, Melvyn L. Goldstein
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 8 (2021)
Magnetohydrodynamic (MHD) turbulent flows are found in the solar wind, the magnetosheath and the magnetotail plasma sheet. In this paper, we review both observational and theoretical evidence for turbulent flow in the magnetotail. MHD simulations of
Externí odkaz:
https://doaj.org/article/9642d68095bf4b5fbc7aee287831f591
Autor:
Paul Prikryl, Robert G. Gillies, David R. Themens, James M. Weygand, Evan G. Thomas, Shibaji Chakraborty
Publikováno v:
Annales Geophysicae. 40:619-639
During minor to moderate geomagnetic storms, caused by corotating interaction regions (CIRs) at the leading edge of high-speed streams (HSSs), solar wind Alfven waves modulated the magnetic reconnection at the dayside magnetopause. The Resolute Bay I
Publikováno v:
Journal of Geophysical Research: Space Physics. 128
Autor:
Paul Prikryl, David R. Themens, Jaroslav Chum, Shibaji Chakraborty, Robert G. Gillies, James M. Weygand
Solar wind Alfvén waves in high-speed streams from coronal holes modulate dayside ionospheric convection and currents, including auroral electrojets [1]. They generate large- to medium-scale atmospheric gravity waves (AGWs) propagating globally from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4220af42e5159cdc851162d2eac598d
https://doi.org/10.5194/egusphere-egu23-3911
https://doi.org/10.5194/egusphere-egu23-3911
Autor:
Mark J. Engebretson, Lily Yang, Erik S. Steinmetz, Vyatcheslav A. Pilipenko, Mark B. Moldwin, Brett A. McCuen, Martin Connors, James M. Weygand, Colin L. Waters, Yukitoshi (Toshi) Nishimura, Larry R. Lyons, Christopher T. Russell
Extreme (≥ 20 nT/s) geomagnetic disturbances (GMDs, also denoted as MPEs - magnetic perturbation events) – impulsive nighttime disturbances with time scale ~5-10 min, have sufficient amplitude to cause bursts of geomagnetically induced currents (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::776cf8a105426ddb694c634978c846a2
https://doi.org/10.22541/essoar.168298702.26747467/v1
https://doi.org/10.22541/essoar.168298702.26747467/v1
Autor:
Liisa Juusola, Ari Viljanen, Andrew P. Dimmock, Mirjam Kellinsalmi, Audrey Schillings, James M. Weygand
Publikováno v:
eISSN
We have examined the most intense external (magnetospheric and ionospheric) and internal (induced) |dH/dt| (amplitude of the 10 s time derivative of the horizontal geomagnetic field) events observed by the high-latitude International Monitor for Auro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::794639fe0c865831c4c762d1f2290637
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-496705
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-496705
Autor:
Mark J. Engebretson, Laura E. Simms, Viacheslav A. Pilipenko, Lilia Bouayed, Mark B. Moldwin, James M. Weygand, Michael D. Hartinger, Zhonghua Xu, C. Robert Clauer, Shane Coyle, Anna N. Willer, Mervyn P. Freeman, Andy J. Gerrard
Publikováno v:
Engebretson, M J, Simms, L E, Pilipenko, V A, Bouayed, L, Moldwin, M B, Weygand, J M, Hartinger, M D, Xu, Z, Clauer, C R, Coyle, S, Willer, A N, Freeman, M P & Gerrard, A J 2022, ' Geomagnetic Disturbances That Cause GICs: Investigating Their Interhemispheric Conjugacy and Control by IMF Orientation ', Journal of Geophysical Research: Space Physics, vol. 127, no. 10, e2022JA030580 . https://doi.org/10.1029/2022JA030580
Nearly all studies of impulsive geomagnetic disturbances (GMDs, also known as magnetic perturbation events MPEs) that can produce dangerous geomagnetically induced currents (GICs) have used data from the northern hemisphere. In this study, we investi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4a46347b16ad0d2ee76e5e71e54c64bc
https://hdl.handle.net/10919/113933
https://hdl.handle.net/10919/113933
Autor:
Xiangning Chu, Robert L. McPherron, Jacob Bortnik, Vassilis Angelopoulos, Tung-Shin Hsu, James M. Weygand, Jinxing Li, Xin Cao, Homayon Aryan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::92a8c950d726af8b9587a70fcc0d44c3
https://doi.org/10.1002/essoar.10512305.1
https://doi.org/10.1002/essoar.10512305.1