Results 51 to 60 of about 2,258 (224)

Seasonal variabilities of low-latitude mesospheric winds [PDF]

Annales Geophysicae, 1998
Observations of mesospheric winds over a period of four years with the partial reflection radar at Tirunelveli (8.7°N, 77.8°E), India, are presented in this study. The emphasis is on describing seasonal variabilities in mean zonal and meridional winds
R. Rajaram, R. Rajaram, S. Gurubaran
doaj   +1 more source

Paleomagnetic Constraints on the Separation of the Olongbuluke Block From the North China Block During the Late Cambrian–Middle Ordovician and Its Tectonic Significance

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract The collisional evolution of the micro‐blocks in the northeastern Tibetan Plateau is relatively well constrained. However, the reason why a fragment of the North China Block, the Olongbuluke Block, became separated from North China by the Central Qilian Block (a fragment of the South China Block) remains unclear.
Teng Wang, Yanan Zhou, Ruiyang Chai, Xin Cheng, Hanning Wu   +4 more
wiley   +1 more source

Geomagnetic survey and geomagnetic model research in China [PDF]

Earth, Planets and Space, 2006
Abstract The geomagnetic survey at 135 stations in China were carried out in 2003. These stations are with better environmental condition and small magnetic field gradient (<5 nT/m). In the field survey, the geomagnetic declination D, the inclination I and the total intensity F were measured.
Gu, Zuowen, Zhan, Zhijia, Gao, Jintian, Han, Wei, An, Zhenchang, Yao, Tongqi, Chen, Bin   +6 more
openaire   +1 more source

Interplanetary Electric Fields for Extreme Magnetic Storms

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract Using a list of sudden‐commencement storms, the ring‐current index, and 1‐h near‐Earth solar‐wind measurements from solar cycles 20–25, we develop extreme‐value statistical models relating storm intensity D=max{−Dst} $D=\max \left\{-Dst\right\}$ to the storm main‐phase maximum duskward interplanetary electric field E $E$.
Jeffrey J. Love, E. Joshua Rigler, Ian G. Richardson, Kalevi Mursula   +3 more
wiley   +1 more source

Paleosecular Variation Constraints on Geomagnetic Field Morphology at ca. 1100 Ma

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract Paleosecular variation provides a statistical test of long‐term geomagnetic field morphology, but its behavior across Precambrian polarity regimes remains poorly constrained. We compile a virtual geomagnetic pole dispersion data set spanning 1130–1070 Ma and apply nonlinear Model G fitting to evaluate field structure across the interval ...
Hanqing Zhao, Shihong Zhang, Jikai Ding, Qiang Ren, Haiyan Li, Weiwei Bian, Tianshui Yang, Huaichun Wu   +7 more
wiley   +1 more source

MMS Observations of the Energetic Particles Within Kelvin‐Helmholtz Waves at the Boundary of the 10 May 2024 Coronal Mass Ejection (CME)

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract On 10 May 2024, Earth was hit by a CME that drove the largest geomagnetic storm in 20 years. Multi‐spacecraft observations previously showed that the ∼100 nT north‐south IMF bz ${b}_{z}$ variation was driven by Kelvin‐Helmholtz waves with wavelength ∼250 RE ${R}_{E}$ and reconnection jets in the ±z $\pm z$‐direction (Nykyri, 2024a, https://doi.
Katariina Nykyri, Neetasha Arya, Scott Boardsen, Guan Le, Harri Laakso, Lynn Wilson, Xuanye Ma, Katherine Holland, Brandon Burkholder, Leon Ofman, Kyoung‐Joo Hwang, Dinesh Radhakrishnan, Shiva Kavosi, Daniel Gershman, Christine Gabrielse, Barbara Giles, Stephen Fuselier, Jim Burch   +17 more
wiley   +1 more source

An Information Geometry‐Based Method to Study Atmospheric and Seismic Phenomena With VLF Signals

Earth and Space Science, Volume 13, Issue 7, July 2026.
Abstract We propose to employ the framework of information geometry to detect anomalies in Very Low Frequency (VLF) and Low Frequency (LF) signal propagation, measured globally across amplitude and phase channels. Using a sliding‐window approach, the probability distributions of signal data are compared over adjacent intervals, defining a statistical ...
Abhiram Anand Thiruthummal, Sergiy Shelyag, Viktor Fedun, Sergey Ruzheinikov, Eun‐jin Kim   +4 more
wiley   +1 more source

Strong Westward Current Pulse at Auroral Latitudes Extending to Dawn‐Side Low‐Latitudes Due To Enhanced Density Within Kelvin‐Helmholtz Wave Vortex in Solar Wind

Geophysical Research Letters
A series of coronal mass ejections (CMEs) from the Sun, interacted with one another and formed a complex interplanetary‐CME (ICME) that impinged Earth's magnetosphere on 10 May 2024 and caused the strongest geomagnetic storm of the past two decades.
B. Nilam, S. Tulasi Ram, D. M. Oliveira, B. Remya, K. Shiokawa, Deeksha Rai, D. Sibeck, A. P. Dimri   +7 more
doaj   +1 more source

Geomagnetic Polarity Timescale [PDF]

, 2001
Dating and time control are essential geoscience, because they allow us to rock sequences from different environments of deposition. Most importantly, accurate time control allows us to calculate rates of change, which is necessary for understanding underlying processes and mechanisms.
Langereis, Cor G., Krijgsman, Wout
openaire   +1 more source

Role of Volcano‐Tectonic Interactions During Early‐Phase Magma‐Assisted Continental Rifting

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 7, July 2026.
Abstract We study volcanic‐tectonic interactions during the early phase of rifting in the Natron Rift, a magmatic segment of the East African Rift System. We use the open‐source crustal deformation modeling code, PyLith, to model deflation during the 2007–2008 explosive eruptions and inflation during 2016–2023.
Ntambila Daud, D. Sarah Stamps, Brad T. Aagaard, Maurizio Battaglia, Elifuraha Saria, Kang‐Hyeun Ji   +5 more
wiley   +1 more source