Results 21 to 30 of about 89 (66)

Clustering of Global Magnetospheric Observations

Journal of Geophysical Research: Machine Learning and Computation
The use of supervised methods in space science have demonstrated powerful capability in classification tasks, but purely unsupervised methods have been less utilized for the classification of spacecraft observations.
James Edmond, Joachim Raeder, Banafsheh Ferdousi, Matthew Argall, Maria Elena Innocenti   +4 more
doaj   +1 more source

Spontaneous Hot Flow Anomalies in Earth's Foreshock

Journal of Geophysical Research: Space Physics, Volume 130, Issue 12, December 2025.
Abstract In recent years, we have learned that foreshock transients play an influential role in solar wind coupling with Earth's magnetosphere. These transients include spontaneous hot flow anomalies (SHFAs), which are characterized by dips in magnetic field magnitude and ion density, enhanced temperature, decelerated and deflected solar wind flow, and
D. Rojas‐Castillo, X. Blanco‐Cano, P. Kajdič   +2 more
wiley   +1 more source

Energy Conversion and Exchange in a Magnetosheath Jet

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract Magnetosheath jets are regions with an extremely large dynamic pressure compared to that of the background plasma. We present a case study of a magnetosheath jet examining energy conversion processes and its interaction with the surrounding magnetosheath plasma.
O. W. Roberts, Z. Vörös, A. Settino, F. Koller, S. Raptis, M. Temmer, C. Simon Wedlund, X. Li, R. Nakamura   +8 more
wiley   +1 more source

Extreme Magnetopause Deformation Induced by High‐Speed Jet From Foreshock Transient

Geophysical Research Letters, Volume 52, Issue 20, 28 October 2025.
Abstract This study presents comprehensive observations of intense high‐speed jets (HSJs) and their global impacts on the inner magnetosphere and ionosphere, using multi‐satellite and ground‐based observations. Cluster‐4, located near the bow shock, observed signatures associated with foreshock transients generated by a solar wind directional ...
Hyangpyo Kim, Rumi Nakamura, Niklas Grimmich, Adriana Settino, Kyoung‐Joo Hwang, Jaeheung Park, Zoltán Vörös, Cyril Simon Wedlund, Kathryn A. McWilliams   +8 more
wiley   +1 more source

Statistical Analysis of Multiple Bow Shock Crossings at Mars

Geophysical Research Letters, Volume 52, Issue 19, 16 October 2025.
Abstract We conduct a statistical analysis of multiple bow shock (BS) crossings at Mars. Data from the magnetometer (MAG) and Solar Wind Ion Analyzer (SWIA) onboard the Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft from its first 2 years in orbit is used to identify flapping events.
Niklas J. T. Edberg, David J. Andrews, Long Cheng, Konstantin Kim, Katerina Stergiopoulou, Mark Lester, Cyril Simon Wedlund, Jasper S. Halekas, Shannon M. Curry   +8 more
wiley   +1 more source

Automated Bow Shock Identification and Multi‐Spacecraft Timing Using Magnetospheric Multiscale (MMS) Observations

Journal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.
Abstract Utilizing 8 years of dayside Magnetospheric Multiscale (MMS) mission plasma region identifications, we present an automatically identified and manually verified data set of 2,594 bow shock crossings in MMS burst‐mode. For each bow shock crossing, we identify the bow shock ramp in each MMS probe using two automated methods and apply multi ...
Vicki Toy‐Edens, Savvas Raptis, Drew L. Turner, Wenli Mo, Sean A. Q. Young   +4 more
wiley   +1 more source

Local Time Dependence of High‐Latitude Pc5 Wave Activity Driven by Interplanetary Shocks and Foreshock Transients, Using a New ULF Index

Journal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.
Abstract We present a study of ground‐based Pc5 ultra‐low frequency (ULF) wave response to over 400 interplanetary (IP) shocks and 18 foreshock transients. We investigated the local time dependence of magnetospheric Pc5 wave power generated by IP shocks and foreshock transients and whether this dependence is related to the impact angle of IP shocks and
Veera Lipsanen, Lucile Turc, Sanni Hoilijoki, Denny M. Oliveira, Souhail Dahani, Shi Tao, Milla Kalliokoski, Mirja Ojuva, Emilia K. J. Kilpua   +8 more
wiley   +1 more source

Occurrence of Non‐Stationarity at Earth's Quasi‐Perpendicular Bow Shock

Geophysical Research Letters, Volume 52, Issue 17, 16 September 2025.
Abstract Collisionless shocks can exhibit non‐stationary behavior even under steady upstream conditions, forming a complex transition region. Ion phase‐space holes, linked to shock self‐reformation and surface ripples, are a signature of this non‐stationarity.
Ajay Lotekar, Yuri V. Khotyaintsev, Daniel B. Graham, Andrew Dimmock, Andreas Johlander, Ahmad Lalti   +5 more
wiley   +1 more source

Three‐Dimensional Global Hybrid Simulations of Plasma Transport and Energy Conversion During Solar Wind‐Magnetosphere Interactions

Geophysical Research Letters, Volume 52, Issue 17, 16 September 2025.
Abstract Plasma transport and energy conversion during solar wind‐magnetosphere interactions under northward, southward, and radial interplanetary magnetic fields (IMFs) are examined using three‐dimensional global hybrid simulations. Energy conversion and entry of plasma and energy are weaker when the IMF is northward.
San Lu, Jin Guo, Quanming Lu, Yukang Shu, Junyi Ren, Rongsheng Wang, Rajkumar Hajra   +6 more
wiley   +1 more source

Stability of the Earth's Dayside Magnetosheath: Effects of Upstream Solar Wind Structures and Downstream Jets

Journal of Geophysical Research: Space Physics, Volume 130, Issue 9, September 2025.
Abstract The constant stream of plasma from the Sun, the solar wind, forms a bow shock as it interacts with Earth's magnetic field. The plasma properties change drastically as it crosses the shock and enter the downstream magnetosheath. This extended region hosts various kinetic ion plasma instabilities, such as mirror modes, ion cyclotron waves, and ...
Florian Koller, Cyril Simon Wedlund, Manuela Temmer, Ida Svenningsson, Luis Preisser, Adrian Pöppelwerth, Pauline A. Simon, Zoltán Vörös, Christopher H. K. Chen, Owen W. Roberts, Ferdinand Plaschke   +10 more
wiley   +1 more source