Results 41 to 50 of about 149 (125)

Unveiling Ionospheric Response to the May 2024 Superstorm With Low‐Earth‐Orbit Satellite Observations

Space Weather, Volume 23, Issue 4, April 2025.
Abstract The space weather event on 10–11 May 2024 was a high‐impact geomagnetic storm, resulting in a SYM‐H index decrease to −518 nT, the lowest level registered in several decades. We investigated the response of the Earth's ionosphere during the main phase of this storm using a comprehensive data set of ionospheric observations (in situ plasma ...
Irina Zakharenkova, Iurii Cherniak, John J. Braun, Jan‐Peter Weiss, Qian Wu, Teresa VanHove, Douglas Hunt, Maggie Sleziak‐Sallee   +7 more
wiley   +1 more source

New Insights on the Crustal Deformation in the Eastern Betics From Densified GNSS Data

Tectonics, Volume 44, Issue 2, February 2025.
Abstract The Eastern Betic cordillera, southeastern Spain, is characterized by slow tectonic deformation rates and moderate seismicity. Great uncertainties persist regarding the precise kinematics of the main fault system within the region, the Eastern Betic Shear Zone (EBSZ). We present a new GNSS (Global Navigation Satellite System) velocity field in
J. Portela, A. Staller, M. Béjar‐Pizarro, J. J. Martínez‐Díaz, J. A. Álvarez‐Gómez, G. Khazaradze   +5 more
wiley   +1 more source

Ionospheric Response to the 24–27 February 2023 Solar Flare and Geomagnetic Storms Over the European Region Using a Machine Learning–Based Tomographic Technique

Space Weather, Volume 23, Issue 1, January 2025.
Abstract Two solar flares accompanied by coronal mass ejections (CMEs) occurred on 24–25 February (DOY 055–056), 2023, resulting in a large magnetic storm on DOY 058. We reconstructed the ionospheric electron density (IED) in Europe to analyze the spatial distribution of ionosphere and its temporal evolution during this period. Computerized ionospheric
Ting Li, Dunyong Zheng, Changyong He, Fei Ye, Pengfei Yuan, Yibin Yao, Mengguang Liao, Jian Xie   +7 more
wiley   +1 more source

Ionospheric TEC Forecast Using Bi‐LSTM With the Adam Optimizer During X‐Class Solar Flares Occurred in the Year 2024 and Validation With IRI‐2020

Advances in Astronomy, Volume 2025, Issue 1, 2025.
Satellite communication and navigation systems have become more essential to everyday life, but at the same time, understanding the effect of solar activity on these systems is vital. Total electron content (TEC) is a key factor affecting satellite signals.
Sarat C. Dass, T. Muthu, R. Mukesh, B. Raghavi, S. Muthamil, S. Nivetha, S. Kiruthiga, Yu Liu   +7 more
wiley   +1 more source

The High Latitude Ionospheric Response to the Major May 2024 Geomagnetic Storm: A Synoptic View

Geophysical Research Letters, Volume 51, Issue 19, 16 October 2024.
Abstract The high latitude ionospheric evolution of the May 10‐11, 2024, geomagnetic storm is investigated in terms of Total Electron Content and contextualized with Incoherent Scatter Radar and ionosonde observations. Substantial plasma lifting is observed within the initial Storm Enhanced Density plume with ionospheric peak heights increasing by 150 ...
David R. Themens, Sean Elvidge, Anthony McCaffrey, P. T. Jayachandran, Anthea Coster, Roger H. Varney, Ivan Galkin, Lindsay V. Goodwin, Chris Watson, Sophie Maguire, Andrew J. Kavanagh, Shun‐Rong Zhang, Larisa Goncharenko, Asti Bhatt, Gareth Dorrian, Keith Groves, Alan G. Wood, Ben Reid   +17 more
wiley   +1 more source

GNSS Real-Time ZTD/PWV Retrieval Based on PPP with Broadcast Ephemerides

Atmosphere
GNSS precise point positioning (PPP) plays an important role in retrieving atmospheric water vapor values and performing numerical weather prediction. However, traditional PPP relies on real-time orbits and clocks, which require continuous internet or ...
Zongqiu Xu, Shuhao Liu, Yantian Xu, Longjiang Tang, Nannan Yang, Gen Zhang   +5 more
doaj   +1 more source

Transient Aseismic Vertical Deformation Across the Steeply‐Dipping Pisia‐Skinos Normal Fault (Gulf of Corinth, Greece)

Tectonics, Volume 43, Issue 8, August 2024.
Abstract Geodetically‐derived deformation rates are sometimes used to infer seismic hazard, implicitly assuming that short‐term (annual‐decadal) deformation is representative of longer‐term deformation. This is despite geological observations indicating that deformation/slip rates are variable over a range of timescales.
Zoë K. Mildon, Manuel Diercks, Gerald P. Roberts, Joanna P. Faure Walker, Athanassios Ganas, Ioannis Papanikolaou, Vassilis Sakas, Jenni Robertson, Claudia Sgambato, Sam Mitchell   +9 more
wiley   +1 more source

An Innovative Low-Power, Low-Cost, Multi-Constellation Geodetic-Grade Global Navigation Satellite System Reference Station for the Densification of Permanent Networks: The GREAT Project. [PDF]

Sensors (Basel), 2023
Curone D, Savarese G, Antonini M, Baucry R, Amani E, Boulandet A, Cataldo M, Chambon P, Chersich M, Hussein AB, Menuel B, Tsaturyan A.   +11 more
europepmc   +1 more source

A Novel Ionospheric Disturbance Index to Evaluate the Global Effect on BeiDou Navigation Satellite System Signal Caused by the Moderate Geomagnetic Storm on May 12, 2021. [PDF]

Sensors (Basel), 2023
He L, Guo C, Yue Q, Zhang S, Qin Z, Zhang J.   +5 more
europepmc   +1 more source

cGPS Record of Active Extension in Moroccan Meseta and Shortening in Atlasic Chains under the Eurasia-Nubia Convergence. [PDF]

Sensors (Basel), 2023
Chalouan A, Gil AJ, Chabli A, Bargach K, Liemlahi H, El Kadiri K, Tendero-Salmerón V, Galindo-Zaldívar J.   +7 more
europepmc   +1 more source