Results 51 to 60 of about 303 (132)

Global Effect of Long‐Lasting 07–12 October 2024 Geomagnetic Storms During the Transition From a Strong (G3) to a Severe (G4) on the Geomagnetic Field and Ionospheric Parameters Distribution

Space Weather, Volume 24, Issue 7, July 2026.
Abstract This study investigates the co‐evolution of geomagnetic field disturbances with ionospheric parameters and their characteristic latitudinal signatures by conducting a location and time‐dependent analysis of the 07–12 October 2024 events, to fill crucial gaps in understanding the coupled response of the magnetosphere‐ionosphere system. This has
Yekoye Asmare Tariku
wiley   +1 more source

Statistical Properties of Dayside Single‐Crest Structure of the Equatorial Ionization Anomaly Derived From Global Ionospheric Maps

Space Weather, Volume 24, Issue 7, July 2026.
Abstract The classical Equatorial Ionization Anomaly (EIA) is characterized by two separated plasma accumulation regions off the geomagnetic equator and a plasma depletion region in between. Deviations from the typical double‐crest structure, including the single crest and multiple crests, have been observed.
Ping Zhou, Xing Meng, Jiawen Chen, Jiuhou Lei   +3 more
wiley   +1 more source

Confirming the impact origin of the São Miguel do Tapuio structure, northeastern Brazil

Meteoritics &Planetary Science, Volume 61, Issue 7, Page 1263-1287, July 2026.
Abstract The São Miguel do Tapuio structure (SMT) is a remarkable, nearcircular feature of about 21 km diameter, centered at 5°37.6′ S, 41°23.3′ W in Piauí state, northeastern Brazil. The structure is located within the sedimentary strata of the Paleozoic–Mesozoic Parnaíba Basin and predominantly comprises sandstones of the Devonian Pimenteiras and ...
Alvaro Penteado Crósta, Neivaldo Araújo de Castro, Marcos Alberto Rodrigues Vasconcelos, Airton Natanael Coelho Dias, Ludovic Ferrière, Wolf Uwe Reimold, Ana Maria Góes, Jackson Alves Martins, Liliana Sayuri Osako, Raimundo Mariano Gomes Castelo Branco   +9 more
wiley   +1 more source

Evolution of NWC Transmitter Wave Power Distribution From the Topside Ionosphere Into the Inner Magnetosphere

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract Ground‐based very low frequency transmitters emit signals that primarily propagate within the Earth–ionosphere waveguide, and some of their energy can propagate into the magnetosphere. Ionospheric observations from the DEMETER satellite reveal a distinct concentric rings pattern of the wave power distribution of the North West Cape transmitter
Zhiyang Xia, Lunjin Chen, Richard B. Horne, Yoshizumi Miyoshi, Yoshiya Kasahara, Shoya Matsuda, Atsuki Shinbori, Tomoaki Hori, Iku Shinohara   +8 more
wiley   +1 more source

Multidisciplinary Investigation of Healy Submarine Volcano (Kermadec Arc, New Zealand) Using AUV and Submersible Data: Structural Control on Magmatic and Hydrothermal Processes

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract We present a comprehensive multidisciplinary investigation of the Healy submarine volcano in the southern Kermadec arc, northeast of New Zealand. We show the first results of sidescan‐sonar data collected at a submarine arc volcano by an Autonomous Underwater Vehicle (AUV).
A. Bagnasco, F. Caratori Tontini, C. E. J. de Ronde, S. L. Walker, L. Cocchi, A. Ghirotto, E. Armadillo   +6 more
wiley   +1 more source

Space Weather Effects From Moderate to Severe Geomagnetic Storms in October 2024 Over the Latin American Sector

Space Weather, Volume 24, Issue 6, June 2026.
Abstract This study presents a detailed case study of the ionospheric impacts of moderate (G2) and severe (G4) geomagnetic storms over the Latin American sector, with particular emphasis on the formation and suppression of equatorial plasma bubbles (EPBs).
C. S. Carmo, L. Dai, C. M. Wrasse, D. Barros, H. Takahashi, J. R. Costa, L. F. R. Vital, P. R. Jauer, C. De La Jara, A. J. Carrasco, C. A. O. B. Figueiredo, C. Wang, H. Li, Z. Liu   +13 more
wiley   +1 more source

GCRAS candidate field models for IGRF-14

Earth, Planets and Space
We present candidate models for the 14th generation of the International Geomagnetic Reference Field (IGRF-14), specifically the Definitive Geomagnetic Reference Field (DGRF) for epoch 2020.0 and the IGRF for epoch 2025.0.
Ilya Firsov, Dmitry Kudin, Anatoly Soloviev, Roman Krasnoperov, Mikhail Dobrovolsky   +4 more
doaj   +1 more source

A Major Update to the PyIRI Model

Space Weather, Volume 24, Issue 6, June 2026.
Abstract This paper presents a major update to the PyIRI model, a fully vectorized Python implementation of the International Reference Ionosphere (IRI). The update reformulates the IRI core coefficients using spherical harmonics in Quasi‐Dipole (QD) latitude and Magnetic Local Time coordinates, replacing the legacy geographic‐coordinate‐based basis ...
Nina Servan‐Schreiber, Victoriya V. Forsythe, Meghan R. Burleigh, Kate A. Zawdie, Douglas P. Drob, Angeline G. Burrell, Joshua Semeter   +6 more
wiley   +1 more source

The Spanish contribution to IGRF-14

Earth, Planets and Space
This study presents the methodology and results of the Spanish team contribution to the 14th generation of the International Geomagnetic Reference Field (IGRF-14), headed by Universidad Complutense de Madrid (UCM).
Mario Serrano, F. Javier Pavón-Carrasco, Saioa A. Campuzano, Santiago Marsal, J. Miquel Torta, J. Manuel Tordesillas, Julián Fiz   +6 more
doaj   +1 more source

Ionospheric Characterization Over Iran Using Multi‐Frequency IMB HF Transmitters and Global WSPRNET Reception During the 12 November 2025 Geomagnetic Storm

Space Weather, Volume 24, Issue 6, June 2026.
Abstract The Ionospheric Monitoring Beacon network in Iran provides continuous, multi‐frequency high‐frequency (HF) transmissions using WSPRNET modulation, enabling global reception and near–real‐time monitoring of ionospheric propagation conditions.
A. Mahmoudian, Saba Hafizi Lotfabadi, Mohammad Azimi   +2 more
wiley   +1 more source