Results 61 to 70 of about 3,042 (156)

Nowcasting Solar Energetic Particle Events for Mars Missions

Space Weather, Volume 23, Issue 4, April 2025.
Abstract In addition to the omnipresent Galactic Cosmic Rays, sudden Solar Energetic Particle (SEP) events present considerable health hazards for manned space missions. These events not only contribute to an increased long‐term cancer risk, but can, in extreme cases, cause acute radiation syndromes.
Jan Leo Löwe, Salman Khaksarighiri, Robert F. Wimmer‐Schweingruber, Donald M. Hassler, Bent Ehresmann, Jingnan Guo, Günther Reitz, Thomas Berger, Daniel Matthiä, Cary Zeitlin, Sven Löffler   +10 more
wiley   +1 more source

Impact crater lake evolution and concomitant hydrothermal mineralization recorded by the Wörnitzostheim drill core at the Ries impact structure, Germany

Meteoritics &Planetary Science, Volume 60, Issue 4, Page 795-822, April 2025.
Abstract Impact‐generated hydrothermal systems and postimpact crater lake systems are well‐documented geological phenomena; however, evidence of hydrothermal venting into impact crater lake systems has rarely been reported. We investigated the well‐preserved contact between hydrothermally altered impact melt‐bearing breccia (outer/surficial suevite ...
Matthew J. O. Svensson, Gordon R. Osinski, Fred J. Longstaffe, Timothy A. Goudge, Haley M. Sapers   +4 more
wiley   +1 more source

Energetic Compact Strokes as the Major Source of Downward Terrestrial Gamma‐Ray Flashes in Winter Thunderstorms

Geophysical Research Letters, Volume 52, Issue 6, 28 March 2025.
Abstract Terrestrial gamma‐ray flashes (TGFs) are short bursts of intense gamma radiation associated with lightning discharges. Although thousands of TGFs have been observed from space, TGFs detected at ground level, known as downward TGFs, are still very limited, and their relationship with lightning discharge processes remains elusive. Here we report
Ting Wu, David M. Smith, Yuuki Wada, Kazuhiro Nakazawa, Manari Oguchi, Masashi Kamogawa, Tomoyuki Suzuki, Qingliu Yang, Daohong Wang   +8 more
wiley   +1 more source

Cosmic Rays and the Askaryan Effect Reveal Subsurface Structure and Buried Ice on the Moon

Geophysical Research Letters, Volume 52, Issue 6, 28 March 2025.
Abstract We present the first full‐wavelength numerical simulations of the electric field generated by cosmic ray impacts into the Moon. Billions of cosmic rays fall onto the Moon every year. Ultra‐high energy cosmic ray impacts produce secondary particle cascades within the regolith and subsequent coherent, wide‐bandwidth, linearly‐polarized radio ...
E. S. Costello, R. R. Ghent, A. Romero‐Wolf, P. W. Gorham, P. G. Lucey, C. J. Tai Udovicic, P. Linton, A. Ludwig, K. McBride, C. Miki, E. Oberla, J. Rolla, A. Jung   +12 more
wiley   +1 more source

Generation of Quasi‐Periodic Dayside Medium Scale Traveling Ionospheric Disturbances (MSTIDs) by Intermittent Lobe Reconnection

Geophysical Research Letters, Volume 52, Issue 6, 28 March 2025.
Abstract The medium‐scale traveling ionospheric disturbances (MSTIDs) can be excited by many sources. Among those magnetic reconnection has been proposed as a potential driver for dayside MSTIDs, but direct evidence has been limited. Using ground‐based radar data from the Super Dual Auroral Radar Network on 14 December 2012, we observed quasi‐periodic ...
Yating Xiong, Huixin Liu, Run Shi, Zanyang Xing, Sheng Lu, Qiang Zhang, Zhiwei Wang, Desheng Han   +7 more
wiley   +1 more source

New Insights on the High Reconnection Rate and the Diminishment of Ion Outflow

Geophysical Research Letters, Volume 52, Issue 6, 28 March 2025.
Abstract The recently discovered electron‐only reconnection has abnormal features like lack of ion outflows and high reconnection rates. Using particle‐in‐cell simulations, we investigate their physical mechanisms. The reconnection rate, when normalized by ion parameters (Ri ${R}_{i}$), may appear anomalously high, whereas that normalized by electron ...
Cheng‐Yu Fan, Shan Wang, Xu‐Zhi Zhou, San Lu, Quanming Lu, Prayash Sharma Pyakurel, Qiugang Zong, Zhi‐Yang Liu   +7 more
wiley   +1 more source

Observations of Kinetic‐Scale Magnetic Hole With Significant Energy Conversion in a Magnetotail Reconnection Diffusion Region

Geophysical Research Letters, Volume 52, Issue 5, 16 March 2025.
Abstract Kinetic‐scale magnetic holes (KSMHs) are ubiquitous quasi‐steady magnetic structures and vital energy conversion channels in various space plasmas, for example, terrestrial foreshock and magnetopause reconnection region. However, the energy conversion mechanism within KSMHs remains unclear.
Xiujuan Ou, Zhihong Zhong, Meng Zhou, Wenqing Ma, Liangjin Song, Ye Pang, Rongxin Tang, Xiaohua Deng   +7 more
wiley   +1 more source

Hall Scale in the Earth's Magnetosphere and Magnetospheric Substorm

Geophysical Research Letters, Volume 52, Issue 5, 16 March 2025.
Abstract We investigate the contribution of the Hall term on the generalized Ohm's law in magnetospheric plasmas. In particular, we focus on its role in processes that lead to the formation of substorm perturbations deep inside the magnetosphere. Using data from the THEMIS mission, we calculate the average Hall length LHall $\left({L}_{\text{Hall ...
E. E. Antonova, I. Kirpichev, M. Stepanova   +2 more
wiley   +1 more source

Magnetorotational instability in dense electron-positron-ion plasmas. [PDF]

Sci Rep, 2023
Usman S, Mushtaq A.
europepmc   +1 more source

Direct frequency comb spectroscopy of HCN to evaluate line lists. [PDF]

Faraday Discuss, 2023
Bailey DM, Crump EM, Hodges JT, Fleisher AJ.   +3 more
europepmc   +1 more source