Results 81 to 90 of about 2,082 (203)

Formation of Foreshock Transients and Associated Secondary Shocks [PDF]

, 2020
Upstream of shocks, the foreshock is filled with hot ions. When these ions are concentrated and thermalized around a discontinuity, a diamagnetic cavity bounded by compressional boundaries, referred to as a foreshock transient, forms.
Osmane, Adnane, Angelopoulos, Vassilis, An, Xin, Liu, Terry Z., Bortnik, Jacob   +4 more
core   +1 more source

Statistical study of magnetic holes in the upstream region of Mercury’s bow shock

Earth and Planetary Physics
Magnetic holes are magnetic depression structures that exist widely in many plasma environments. The magnetic holes with durations of >1 s in the solar wind at Mercury’s orbit have drawn much attention, but the properties of the magnetic holes with ...
GuoQiang Wang, SuDong Xiao, MingYu Wu, YuanQiang Chen, TieLong Zhang   +4 more
doaj   +1 more source

The 2025 Mw 8.8 Kamchatka Megathrust: A Rapid Recurrence With Complex Heterogeneous Rupture

Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.
Abstract On 29 July 2025, a Mw 8.8 earthquake struck Kamchatka, ∼50 km from the 1952 Mw 9.0 megathrust hypocenter, exhibiting a comparable aftershock zone. We resolve the kinematic rupture process and slip distribution by combining teleseismic waveforms with high‐quality tsunami data.
Junpeng Li, Zhe Jia
wiley   +1 more source

Stress Field and Megathrust Strength in the Western Hellenic Subduction System: Insights From the 2024 Mw 5.9 Strofades Earthquake Sequence, Greece

Geophysical Research Letters, Volume 53, Issue 9, 16 May 2026.
Abstract A M5.9 earthquake occurred on 29 March 2024, offshore near the Strofades Islands, in the western Hellenic Subduction System. Here we present high‐precision earthquake locations and focal mechanisms that suggest the rupture of a NNE‐SSW striking, left‐lateral strike‐slip fault.
G. M. Bocchini, D. Essing, I. Nikolopoulou, A. Dielforder, M. P. Roth, A. Serpetsidaki, E. Sokos, C. P. Evangelidis, R. M. Harrington   +8 more
wiley   +1 more source

The ULF wave foreshock boundary: Cluster observations [PDF]

, 2015
The interaction of backstreaming ions with the incoming solar wind in the upstream region of the bow shock gives rise to a number of plasma instabilities from which ultralow frequency (ULF) waves can grow.
Meziane, Karim, Mazelle, Christian, Bertucci, Cesar, Karim Meziane, Christian Mazelle, Daniel Gómez, Andrés, Nahuel, Nahuel Andrés, Cesar Bertucci, Gomez, Daniel Osvaldo   +9 more
core   +1 more source

Transient Foreshock Structures Upstream of Mars: Implications of the Small Martian Bow Shock

, 2023
We characterize the nature of magnetic structures in the foreshock region of Mars associated with discontinuities in the solar wind. The structures form at the upstream edge of moving foreshocks caused by slow rotations in the interplanetary magnetic ...
Brain, D A, D. A. Brain, Curry, S M, S. Xu, Schwartz, S. J., Omidi, N, L. Andersson, R. Ramstad, S. J. Schwartz, S. M. Curry, Mitchell, D L, Kajdic, P., Frahm, R. A., N. Omidi, Madanian, H, Gruesbeck, J. R., Andersson, L, Ramstad, R., R. A. Frahm, F. G. Eparvier, Kajdic, P, Sibeck, D G, Frahm, R A, D. G. Sibeck, Xu, S., Ramstad, R, P. Kajdic, Omidi, N., H. Madanian, Gruesbeck, J R, Xu, S, J. R. Gruesbeck, Brain, D. A., Mitchell, D. L., Eparvier, F. G., Eparvier, F G, Sibeck, D. G., Andersson, L., D. L. Mitchell, Madanian, H., Curry, S. M., Schwartz, S J   +41 more
core   +1 more source

2025 U.S. Geological Survey National Seismic Hazard Model for Puerto Rico and the U.S. Virgin Islands: Overview of Model and Hazard Results

Earthquake Spectra, Volume 42, Issue 2, May 2026.
The U.S. Geological Survey recently updated the National Seismic Hazard Model (NSHM) for Puerto Rico and the U.S. Virgin Islands (PRVI). The first version of the PRVI NSHM was released in 2003, and therefore this 2025 update includes over 20 years of new geologic, geophysical, and engineering data, methods, and models.
Allison M. Shumway, Kevin R. Milner, Peter M. Powers, Morgan P. Moschetti, Jason M. Altekruse, Julie A. Herrick, Andrea L. Llenos, Kyle B. Withers, Edward H. Field, Brad T. Aagaard, Richard W. Briggs, Alexandra E. Hatem, Kirstie L. Haynie, Andrew J. Michael, Jessica A. Thompson Jobe, Kishor S. Jaiswal, Brandon S. Clayton, Nicolas Luco, Mark D. Petersen, Sanaz Rezaeian, Thomas L. Pratt, Yuehua Zeng   +21 more
wiley   +1 more source

On the Importance of Spatial and Velocity Resolution in the Hybrid-Vlasov Modeling of Collisionless Shocks

Frontiers in Physics, 2018
In hybrid-Vlasov plasma modeling, the ion velocity distribution function is propagated using the Vlasov equation while electrons are considered a charge-neutralizing fluid. It is an alternative to particle-in-cell methods, one advantage being the absence
Yann Pfau-Kempf, Markus Battarbee, Urs Ganse, Sanni Hoilijoki, Sanni Hoilijoki, Lucile Turc, Sebastian von Alfthan, Rami Vainio, Minna Palmroth, Minna Palmroth   +9 more
doaj   +1 more source

“Caterpillar” ULF Waves in the Dusk Side Sub‐Auroral Region: Conjugate Observations With SuperDARN, Arase and Ground Magnetometers

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract On 23 November 2022, during exceptionally quiet geomagnetic conditions, a distinct ultra‐low frequency (ULF) wave in the Pc5 band (∼2.4 mHz) was observed in the duskside sub‐auroral region by two Canadian SuperDARN (Super Dual Auroral Radar Network) radars.
N. Nishitani, K. Hosokawa, T. Hori, M. Teramoto, P. V. Ponomarenko, A. Shinbori, Y. Obana, A. S. Yukimatu, G. Hussey, Y. Miyoshi, A. Matsuoka, A. Kumamoto, F. Tsuchiya, S. Matsuda, Y. Kasahara, S. Nakamura, I. Shinohara, Y. Zhang, L. Paxton   +18 more
wiley   +1 more source

The electron foreshock at high-Mach-number nonrelativistic oblique shocks

, 2022
In the Universe matter outside of stars and compact objects is mostly composed of collisionless plasma. The interaction of a supersonic plasma flow with an obstacle results in collisionless shocks that are often associated with intense nonthermal ...
Morris, Paul J., Martin Pohl, Weidl, Martin, Morris, Paul, Artem Bohdan, Pohl, Martin (Prof. Dr.), Weidl, Martin S., Paul J. Morris, Bohdan, Artem, Pohl, Martin, Martin S. Weidl   +10 more
core   +1 more source