Results 61 to 70 of about 51,199 (257)

Helioseismic response to X2.2 solar flare of February 15, 2011

, 2011
The X2.2-class solar flare of February 15, 2011, produced a powerful sunquake event, representing a helioseismic response to the flare impact in the solar photosphere, which was observed with the HMI instrument on the Solar Dynamics Observatory (SDO ...
Donea, Donea, Hudson, Kosovichev, Kosovichev, Kosovichev, Kosovichev, Kosovichev, Kosovichev, Kostiuk, Zharkova   +10 more
core   +1 more source

The Relationship Between the Magnetometer Data Derived GIC Index and Measured GIC in High Voltage Transformers in Australia

Space Weather, Volume 24, Issue 1, January 2026.
Abstract Geomagnetically induced currents (GICs) are telluric currents driven by space weather that can adversely impact high voltage transformers in electricity supply networks. It is often difficult to obtain transformer GIC data so ground based magnetometer data may be used to estimate the transformer GIC via complex modeling of both network and ...
C. L. Waters, R. A. Marshall
wiley   +1 more source

Response of the Thermosphere‐Ionosphere System to an X‐Class Solar Flare: 30 March 2022 Case Study

Space Weather
The response of the thermosphere ionosphere system to an X1.3 class solar flare is studied using observations of the total electron content (TEC) and the Global Ionosphere Thermosphere Model (GITM) simulations.
Volkan Sarp, Erdal Yiğit, Ali Kilcik
doaj   +1 more source

Space Weather and Low‐Altitude Drone Economy

Space Weather, Volume 24, Issue 1, January 2026.
Abstract Unmanned Aerial Vehicles (UAVs) are becoming integral to the emerging low‐altitude economy, operating primarily below 3,000 m for applications such as logistics, inspection, precision agriculture, and urban air mobility. The safe and reliable operation of UAVs depends critically on communication, navigation, and surveillance (CNS) systems ...
Dabin Xue, Qing‐He Zhang, Xueshang Feng, Chi Wang   +3 more
wiley   +1 more source

Energy Deposition into the Ionosphere during a Solar Flare with Extreme-ultraviolet Late Phase

The Astrophysical Journal Letters
Solar extreme-ultraviolet (EUV) irradiance is the dominant energy source for ionizing and heating the Earth’s upper atmosphere. It is common to assume that the spectra of different EUV lines have the same trend to fill the solar EUV irradiance gap for ...
Jing Liu, Liying Qian, Wenbin Wang, Kevin Pham, Xiangliang Kong, Yao Chen, Wenlong Liu, Libo Liu, Xuanqing Liu   +8 more
doaj   +1 more source

Variation of the electron flux spectrum along a solar flare loop as inferred from STIX hard X-ray observations [PDF]

, 2023
Anna Volpara, Paolo Massa, Säm Krucker, A. G. Emslie, Michele Piana, Anna Maria Massone   +5 more
openalex   +1 more source

The Thermal Properties of Solar Flares Over Three Solar Cycles Using GOES X-ray Observations

, 2012
Solar flare X-ray emission results from rapidly increasing temperatures and emission measures in flaring active region loops. To date, observations from the X-Ray Sensor (XRS) onboard the Geostationary Operational Environmental Satellite (GOES) have been
A. Kim Tolbert, Aschwanden, Aschwanden, Brian R. Dennis, C. Alex Young, Carmichael, Caspi, Christe, Daniel F. Ryan, Feldman, Fludra, Hannah, Landi, Peter T. Gallagher, Phillips, Phillips, Richard A. Schwartz, Ryan O. Milligan   +17 more
core   +1 more source

New cases of δ‐aminolevulinic acid dehydratase deficiency: Functional insights into gene variants using an innovative mouse liver model

Journal of Internal Medicine, Volume 299, Issue 1, Page 126-142, January 2026.
Abstract Background Dysfunction of δ‐aminolevulinic acid dehydratase (ALAD), the second enzyme involved in heme biosynthesis, leads to two pathologies: genetic and acquired. The genetic form is an ultrarare, severe childhood‐onset disease inherited in an autosomal recessive manner, whereas the acquired form usually affects adults due to enzyme ...
Elena Di Pierro, Isabel Solares, Daniel Jericó, Francisco J. Castelbón, Javier Tomás Solera, Antoni Riera‐Mestre, María Barreda‐Sánchez, Carlo Poci, Annamaria Nicolli, Francesco Urigo, Ana Sampedro, Rafael Enríquez de Salamanca, Matteo Marcacci, Matías A. Ávila, Pauline Harper, Marta G. Fanlo‐Maresma, Encarna Guillén‐Navarro, Giovanna Graziadei, Andrea Wenzel, Bodo B. Beck, Paolo Ventura, Montserrat Morales‐Conejo, Antonio Fontanellas   +22 more
wiley   +1 more source

Investigation of Relationship Between High-Energy X-ray Sources and Photospheric and Helioseismic Impacts of X1.8 Solar Flare of October 23, 2012

, 2017
The X-class solar flare of October 23, 2012, generated continuum photospheric emission and a strong helioseismic wave ("sunquake") that points to an intensive energy release in the dense part of the solar atmosphere.
Kosovichev, Alexander G, Myshyakov, Ivan I, Sadykov, Viacheslav M, Sharykin, Ivan N, Zimovets, Ivan V   +4 more
core   +1 more source

On the Optimal Prediction of Extreme Events in Heavy‐Tailed Time Series With Applications to Solar Flare Forecasting

Journal of Time Series Analysis, Volume 47, Issue 1, Page 25-42, January 2026.
ABSTRACT The prediction of extreme events in time series is a fundamental problem arising in many financial, scientific, engineering, and other applications. We begin by establishing a general Neyman–Pearson‐type characterization of optimal extreme event predictors in terms of density ratios.
Victor Verma, Stilian Stoev, Yang Chen
wiley   +1 more source