Results 91 to 100 of about 6,894 (231)

Plasma Frequency Waves in Earth's Electron Foreshock

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract At Earth's quasi‐perpendicular bow shock, electrons are reflected and accelerated to high velocities, forming beams. These beams excite Langmuir and beam‐mode waves in the electron foreshock region. The waves can then be converted to radio waves via linear or nonlinear processes.
Daniel B. Graham, Yuri V. Khotyaintsev, Mats André, Andris Vaivads, Iver H. Cairns   +4 more
wiley   +1 more source

Combining Borehole Seismic Data and Deep‐Learning Methods to Monitor Seismic Sequences in the Istanbul‐Marmara Region, NW Türkiye

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 10, October 2026.
Abstract The North Anatolian Fault Zone beneath the Sea of Marmara in NW Türkiye displays a 50% probability of an M≥7 $\mathrm{M}\ge 7$ earthquake within the next decades. The proximity of the fault to the Istanbul megalopolis highlights the need for high‐resolution microseismicity monitoring to identify seismicity transients including pre‐mainshock ...
Oliver Fabisch, Marco Bohnhoff, Patricia Martínez‐Garzón   +2 more
wiley   +1 more source

Marine Geophysical Investigation of a Fault Ruptured During the 2012 Mw 8.6 Wharton Basin Earthquake

Tectonics, Volume 45, Issue 10, October 2026.
Abstract The 2012 Mw 8.6 and 8.2 Wharton Basin earthquakes, within an intraplate deformation zone in the Indian Ocean, are the largest instrumentally recorded strike‐slip earthquakes on Earth that challenged the prevailing view that great earthquakes occur only at well‐defined plate boundaries.
Saksham Rohilla, Hélène Carton, Satish C. Singh, Muriel Laurencin, Nugroho Hananto, Mihai Roharik, Yanfang Qin, Sudipta Sarkar, Mark Noble, Mari Hamahashi, Paul Tapponnier   +10 more
wiley   +1 more source

Oxygen foreshock of Mars

Planetary and Space Science, 2015
AbstractMars Express (MEX) has operated for more than 10 years in the environment of Mars, providing solar wind ion observations from the Analyzer of Space Plasmas and Energetic Atoms experiment's Ion Mass Analyser (IMA). On 21 September 2008, MEX/IMA detected foreshock-like discrete distributions of oxygen ions at around 1keV in the solar wind ...
Yamauchi, M., Lundin, R., Frahm, R.A., Sauvaud, J.-A., Holmström, M., Barabash, S.   +5 more
openaire   +1 more source

Magnetic Reconnection Driven by the Impact of a Magnetosheath High‐Speed Jet

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract High‐speed jets (HSJs) are transient structures in the magnetosheath characterized by enhanced dynamic pressure. While recent studies report that HSJs trigger magnetic reconnection at the magnetopause, whether they can directly drive reconnection within the magnetosheath remains an open question.
Jiuqi Ma, Xinliang Gao, Quanming Lu, Shimou Wang, Jin Guo, Zhongwei Yang, Binbin Tang, Junyi Ren, Rongsheng Wang   +8 more
wiley   +1 more source

Substorm Effects on Chorus Emissions Modulated by ULF Waves

Geophysical Research Letters, Volume 53, Issue 17, 16 September 2026.
Abstract Although cross‐scale wave‐particle interactions play a critical role in energy transfer in the magnetosphere, the influence of geomagnetic activity on the physical mechanisms involved remains unclear. In this study, we investigate this question by analyzing Van Allen Probes‐A observations of an event occurring on 25 July 2016.
Xing‐Yu Li, Qiu‐Gang Zong, Shan Wang, Xu‐Zhi Zhou, Chao Yue, Robert Rankin, Li Li, Yong‐Fu Wang, Yi‐Xin Sun, Hua‐Yun Shen, Bin He, Yong Wu   +11 more
wiley   +1 more source

维西—乔后断裂带及其周边地区震群和前震序列活动特征

Dizhen xuebao
使用云南地震台网2009—2021年的地震目录和波形数据，采用双差定位方法、基于P波初动极性和S/P振幅比的HASH方法和最大似然法等，获取了维西—乔后断裂带及附近地区ML≥4.0震群和前震序列精确的震源位置、震源机制解、视应力和b值等地震活动参数，对比分析了维西—乔后断裂带及其周边震群及前震序列的活动特征。结果显示：除前震序列频次呈现出反大森定律外，前震序列与普通震群在空间分布、震源机制一致性、视应力和b值等单一参数方面并无明显的差异；但前震序列同时具备震中优势分布方向与区域主要构造展布方向一致 ...
Guangming Wang, Xin Ouyang, Zifeng Liu, Guanling Peng, Jinzhong Jiang   +4 more
doaj   +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

The 2025 Kamchatka Earthquake and Tsunami: Cascading Impacts and Risks to Japan

Earthquake Engineering &Structural Dynamics, Volume 55, Issue 11, Page 2837-2854, September 2026.
ABSTRACT On July 29th, 2025, a large earthquake (Mw 8.8) occurred near the Kamchatka Peninsula. This event caused a tsunami that reached Japan's Pacific coast, even though the source was far away. In this study, we analyze the characteristics of earthquakes and tsunamis and discuss how they relate to the recurrence possibility and risk in Japan.
Ampan Laosunthara, An‐Chi Cheng, Yo Fukushima, Yoshinori Shigihara, Natt Leelawat, Anawat Suppasri, Fumihiko Imamura   +6 more
wiley   +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