Results 91 to 100 of about 5,647 (190)

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

Magnetic field amplification and electron acceleration to near-energy equipartition with ions by a mildly relativistic quasi-parallel plasma protoshock

, 2010
The prompt emissions of gamma-ray bursts are seeded by radiating ultrarelativistic electrons. Internal shocks propagating through a jet launched by a stellar implosion, are expected to amplify the magnetic field & accelerate electrons.
A. Bret, Alexandrova, Amano, Amato, Bessho, Brainerd, Bret, Bret, Cary, Coburn, Cowan, Dawson, Dieckmann, Dieckmann, Dieckmann, Dupree, Fleishman, Forslund, Fox, Frederiksen, G. C. Murphy, Granot, Hammer, Hededal, Hjorth, Hoshino, Jaroschek, Kazimura, Kirk, Kirk, Kulkarni, L. O’ C. Drury, Lee, Lembège, Lembège, Lemoine, Leroy, Lyutikov, M. E. Dieckmann, Martins, Medvedev, Meszaros, Mora, Murphy, Murphy, Nishikawa, Nishikawa, Piran, Quest, Rees, Roth, Ryde, Schlickeiser, Schlickeiser, Scholer, Shikii, Silva, Sironi, Sorasio, Spitkovsky, Steele, Umeda, Waxman   +62 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

Preliminary Analysis of the Aftershock Sequence of the February 6, 2023, Turkey Earthquake [PDF]

مجلة جامعة النجاح للأبحاث العلوم الطبيعية
The February 6, 2023, Turkey earthquake with a moment magnitude (Mw=7.8) will be recognized as one of the most powerful earthquakes to strike a large metropolitan area in recent memory.
Radwan El-Kelani, Anas Atatri
doaj   +1 more source

Comments on "Cavitons and spontaneous hot flow anomalies in a hybrid-Vlasov global magnetospheric simulation" by Blanco-Cano et al. (2018)

, 2019
Blanco-Cano et al. (2018) intended to find a type of transient event in the solar wind before the terrestrial bow shock using a special type of simulation. However, the simulation results cannot reproduce the main features of the event.
Facskó, Gábor
core   +1 more source

Large scale motions of Neptune's bow shock: Evidence for control of the shock position by the rotation phase of Neptune's magnetic field [PDF]

The Voyager 2 spacecraft observed high levels of Langmuir waves before the inbound crossing of Neptune's bow shock, thereby signifying magnetic connection of the bow shock.
Cairns, Iver H., Gurnett, Donald A., Kurth, William S., Moses, Stewart L., Smith, Charles W.   +4 more
core   +1 more source

Long Term Evolution of Magnetic Turbulence in Relativistic Collisionless Shocks: Electron-Positron Plasmas

, 2007
We study the long term evolution of magnetic fields generated by a collisionless relativistic $e^+e^-$ shock which is initially unmagnetized. Our 2D particle-in-cell numerical simulations show that downstream of such a Weibel-mediated shock, particle ...
Anatoly Spitkovsky, Bell A. R., Jonathan Arons, Philip Chang   +3 more
core   +1 more source

2022年6月10日四川马尔康MS6.0震群序列时空演化特征

Dizhen xuebao
2022年6月10日马尔康MS6.0震群序列发生在松岗断裂与龙日坝断裂交会处，呈震群型活动特征。本文以四川地震台网目录为基础，对马尔康地震序列的参数特征开展研究，取该序列三次MS5.0地震之后各一个小时，作为 Ⅰ ， Ⅱ ， Ⅲ 共计三个阶段，进行对比分析。由于较大地震后短时间内目录遗漏的余震较多，为增大研究所需的地震样本量，首先采用模板匹配法进行微小地震识别，以补充完备目录，并利用识别的地震目录及台网目录分别计算马尔康MS6.0地震序列的b值、p值等参数。计算结果显示，相比于第 Ⅱ 和 Ⅲ 阶段，第 ...
Yue Gong, Feng Long, Min Zhao, Peng Yang, Yuxi Wang, Mingjian Liang, Huizhen Qiao, Yuhang Wang   +7 more
doaj   +1 more source

Deceleration of the solar wind in the Earth foreshock region: ISEE 2 and IMP 8 observations [PDF]

The deceleration of the solar wind in the region of the interplanetary space filled by ions backstreaming from the Earth bow shock was studied using a two spacecraft technique.
Bonifazi, C., Lazarus, A. J., Moreno, G., Sullivan, J. D.   +3 more
core   +1 more source

Observations and Simulations of a Double‐Core Hot Flow Anomaly

Geophysical Research Letters
Hot Flow anomalies (HFAs), one of the most well‐analyzed transient phenomena in the Earth's foreshock, are known as kinetic structures driven by tangential discontinuities (TDs).
Xi Lu, Antonius Otto, Hui Zhang, Terry Liu, Xingran Chen   +4 more
doaj   +1 more source