Results 71 to 80 of about 9,433 (226)

Arrival times of Flare/Halo CME associated shocks at the Earth: comparison of the predictions of three numerical models with these observations [PDF]

Annales Geophysicae, 2002
The arrival times at L1 of eleven travelling shocks associated both with X-ray flaring and with halo CMEs recorded aboard SOHO/LASCO have been considered.
S. M. P. McKenna-Lawlor, S. M. P. McKenna-Lawlor, S. M. P. McKenna-Lawlor, M. Dryer, M. Dryer, Z. Smith, K. Kecskemety, C. D. Fry, W. Sun, C. S. Deehr, D. Berdichevsky, D. Berdichevsky, K. Kudela, G. Zastenker   +13 more
doaj   +1 more source

Impact‐Generated Mixing, Melting and Vaporization of the Early Earth's Crust

Earth and Space Science, Volume 13, Issue 2, February 2026.
Abstract Earth's primary accretion was followed by a protracted flux of interplanetary collisions by leftover planetesimals. The effects of the largest collisions—with bodies possibly exceeding 1,000 km diameter—would have been devastating for terrestrial near‐surface environments.
S. Marchi, A. M. Alexander, R. Citron, B. C. Johnson   +3 more
wiley   +1 more source

Energetics of Shock-triggered Supersubstorms (SML < −2500 nT)

The Astrophysical Journal, 2023
The solar wind energy input and dissipation in the magnetospheric–ionospheric systems of 17 supersubstorms (SSSs: SML < −2500 nT) triggered by interplanetary shocks during solar cycles 23 and 24 are studied in detail. The SSS events had durations ranging
Bruce T. Tsurutani, Rajkumar Hajra
doaj   +1 more source

Ionosphere‐Thermosphere Coupling in the Northern Polar Region During the May 2024 Geomagnetic Superstorm

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract The May 2024 superstorm, as the most intense geomagnetic storm since 2003, caused a variety of disturbances in the magnetosphere‐ionosphere‐thermosphere system. This study investigates the long‐lasting electron density depletion in the polar region and the underlying ionosphere‐thermosphere coupling, based on a comprehensive set of ...
Lei Cai, Anita Aikio, G. P. Geethakumari, Heikki Vanhamäki, I. I. Virtanen, Shin‐ichiro Oyama, Yongliang Zhang, Jiaojiao Zhang, Marc Hairston   +8 more
wiley   +1 more source

Search for a simultaneous signal from small transient events in the Pierre Auger Observatory and the Tupi muon telescopes

, 2011
We present results of a search for a possible signal from small scale solar transient events (such as flares and interplanetary shocks) as well as possible counterparts to Gamma-Ray Burst (GRB) observed simultaneously by the Tupi muon telescope Niteroi ...
A. Fasso, C. E. Navia, C. R. A. Augusto, H. Asorey, K. H. Tsui, M. Casolino, T. Sinzi, V. Kopenkin, X. Bertou   +8 more
core   +1 more source

Interplanetary shock induced ring current auroras [PDF]

Journal of Geophysical Research: Space Physics, 2008
On 21 January 2005, a fast interplanetary (IP) shock compressed the magnetosphere and caused detached auroras (DA) on the dayside, duskside and nightside ionosphere. The DA were detected by three independent FUV instruments: IMAGE/SI‐12, TIMED/GUVI and DMSP/SSUSI. The SI‐12 observations show that the dayside detached aurora (DDA) was located between 60°
Yongliang Zhang, Larry J. Paxton, Yihua Zheng   +2 more
openaire   +1 more source

Poleward Disturbances in Thermospheric Winds During the 3–4 November 2021 Geomagnetic Storm

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract This study focuses on ionosphere‐thermosphere coupling over North America during the 3–4 November 2021 strong geomagnetic storm (Kp 8−). We comprehensively analyze storm‐time ionospheric and thermospheric disturbances using data from ground‐based instruments at Poker Flat, Millstone Hill, and Urbana, as well as satellite observations and model
Jonna Wehmeyer, Yoshihiro Tomikawa, Takanori Nishiyama, Yasunobu Ogawa, Eframir Franco‐Diaz   +4 more
wiley   +1 more source

Flat Spectra of Energetic Particles in Interplanetary Shock Precursors

The Astrophysical Journal
The observed energy spectra of accelerated particles at interplanetary shocks often do not match the diffusive shock acceleration (DSA) theory predictions. In some cases, the particle flux forms a plateau over a wide range of energies, extending upstream
Mikhail Malkov, Joe Giacalone, Fan Guo
doaj   +1 more source

Coronal Mass Ejections - Propagation Time and Associated Internal Energy

, 2010
In this paper, we analyze 91 coronal mass ejection (CME) events studied by Manoharan et al. (2004) and Gopalswamy and Xie (2008). These earth-directed CMEs are large (width $>$160$^\circ$) and cover a wide range of speeds ($\sim$120--2400 {\kmps}) in the
A. Mujiber Rahman, Chashei, Chen, Cho, Gonzalez-Esparza, Gopalswamy, Gopalswamy, Gopalswamy, Gopalswamy, Howard, Jones, Joshi, Kumar, Manoharan, Manoharan, Manoharan, Manoharan, Manoharan, Metcalf, Michalek, P.K. Manoharan, Richardson, Tokumaru, Tsurutani, Vlasov, Xie   +25 more
core   +1 more source

Halo Coronal Mass Ejections during Solar Cycle 24: reconstruction of the global scenario and geoeffectiveness [PDF]

, 2017
In this study we present a statistical analysis of 53 fast Earth-directed halo CMEs observed by the SOHO/LASCO instrument during the period Jan. 2009-Sep.
Messerotti, Mauro, Poedts, Stefaan, Rodriguez, Luciano, Scolini, Camilla   +3 more
core   +4 more sources