Col·leccions en aquesta comunitat
Enviaments recents
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The Lehtinen–Pirjola method modified for efficient modelling of geomagnetically induced currents in multiple voltage levels of a power network
(Annales Geophysichae, 40(2), 205–215, 2022, 2022-04-20)The need for accurate assessment of the geomagnetic hazard to power systems is driving a requirement to model geomagnetically induced currents (GIC) in multiple voltage levels of a power network. The ... -
Geomagnetically induced currents in a power grid of northeastern Spain
(Space Weather, 10, S06002, 2012-06-07)Using the geomagnetic records of Ebro geomagnetic observatory and taking the plane wave assumption for the external current source and a homogeneous Earth conductivity, a prediction of the effects of ... -
Quantifying the Performance of Geomagnetically Induced Current Models
(Space Weather, 17, 941–949, 2019-07-24)We describe a metric that has been repeatedly applied to assess the performance of models aimed at predicting geomagnetically induced currents from Space Weather events. The used parameterization, ... -
A New Standalone Tool for DC-Equivalent Network Generation and GIC Calculation in Power Grids With Multiple Voltage Levels
(Space Weather, 20, e2021SW002984, 2022-01-15)Space Weather phenomena pose a major socio-economic threat due, in part, to the vulnerability of power network transformers to geomagnetically induced currents (GIC). In 1985, Lehtinen and Pirjola ... -
Validating GIC Modeling in the Spanish Power Grid by Differential Magnetometry
(Space Weather, 19, e2021SW002905, 2021-11-12)A series of experiences and recommendations are presented concerning the derivation of geomagnetically induced currents (GIC) by use of the differential magnetometry method (DMM) under power lines. ... -
Including the Temporal Dimension in the SECS Technique
(Space Weather, 18, e2020SW002491, 2020-06-08)The equivalent source method of Spherical Elementary Current Systems (SECS) has contributed valuable results for spatial magnetic interpolation purposes where no observations are available, as well ... -
Data‐Driven Transfer Functions From Differential Magnetometer Measurements to Enhance GIC Model Validation Capability: A Case Study in the Spanish Power Grid
(Space Weather, 23, e2024SW004180, 2025-02-16)Geomagnetically induced currents (GICs) are unwanted currents flowing in long grounded conductors because of space weather phenomena. Example GICs are those flowing in power transmission lines via ... -
Pilot Ionosonde Network for Identification of Traveling Ionospheric Disturbances
(Radio Science, 53, 365–378., 2018-03-30)Traveling ionospheric disturbances (TIDs) are the ionospheric signatures of atmospheric gravity waves. Their identification and tracking is important because the TIDs affect all services that rely on ... -
Improved characterization and modeling of equatorial plasma depletions
(J. Space Weather Space Clim. 2018, 8, A38, 2018-08-22)This manuscript presents a method to identify the occurrence of Equatorial Plasma Bubbles (EPBs) with data gathered from receivers of Global Navigation Satellite System (GNSS). This method adapts a ... -
An overview of methodologies for real-time detection, characterisation and tracking of traveling ionospheric disturbances developed in the TechTIDE project
(J. Space Weather Space Clim. 2020, 10, 42, 2020-09-22)The main objective of the TechTIDE project (warning and mitigation technologies for travelling ionospheric disturbances effects) is the development of an identification and tracking system for travelling ... -
The International Reference Ionosphere Model: A Review and Description of an Ionospheric Benchmark
(Reviews of Geophysics, 60, e2022RG000792., 2022-12)This paper is a review of the International Reference Ionosphere (IRI) project and model. IRI is recognized as the official standard for the Earth's ionosphere by the International Standardization ... -
Multi-instrument detection in Europe of ionospheric disturbances caused by the 15 January 2022 eruption of the Hunga volcano
(J. Space Weather Space Clim. 2022, 12, 35, 2022-10-21)The 15 January 2022 eruption of the Hunga volcano provides a unique opportunity to study the reaction of the ionosphere to large explosive events. In particular, this event allows us to study the global ... -
The Evolution over Time and North–South Asymmetry of Sunspots and Solar Plages for the Period 1910 to 1937 Using Data from Ebro Catalogues
(Solar Phys (2020) 295:99, 2020-07-23)In this work, we analysed both the evolution over time and the north–south (N-S) asymmetry of certain solar features with regards to their morphological type and area. We examined and compared simultaneously ... -
Application of the Markov Chain Model to Sunspots and Solar Plages for the Period 1910 to 1937 Using Data fromEbro Catalogues
(Solar Physics (2021) 296:92, 2021-06-11)In this article, we analyzed the morphological evolution of the sunspot and solar calcium plage groups recorded at the Ebro Observatory in the period 1910–1937 to make predictions about several properties ... -
Temporal variation and asymmetry of sunspot and solar plage types from 1930 to 1936
(Advances in Space Research, 63, 11, 2019-02-23)Using the recently converted to digital format heliophysics catalogues of the Ebro Observatory published in the 1930s, we analyse simultaneously the temporal variation and asymmetry of two different ... -
The Solar Rotation in the 1930s from the Sunspot and Flocculi Catalogs of the Ebro Observatory
(Solar Phys (2016) 291:2269–2279, 2016-09-06)The tables of sunspot and flocculi heliographic positions included in the catalogs published by the Ebro Observatory in the 1930s have recently been recovered and converted into digital format by using ... -
Modelling by Spherical Cap Harmonic Analysis: A Literature Review
(Surveys in Geophysics, Volume 41, pages 201–247, (2020), 2019-11-06)There is the need for robust alternatives to the widely used spherical harmonic analysis when measurements are restricted to a region, or when high spatial frequency fields with much less parameters ... -
Improving the modeling of geomagnetically induced currents in Spain
(2017-04-19)Vulnerability assessments of the risk posed by geomagnetically induced currents (GICs) to power transmission grids benefit from accurate knowledge of the geomagnetic field variations at each node of ... -
Automatic detection of sudden commencements using neural networks
(Earth, Planets and Space, volum 65, pàg. 791-797, 2013-08-23)The aim of this work is to develop an automatic system to detect sudden commencements (SCs). SCs are produced by a sudden increase of solar wind dynamic pressure and are detected simultaneously everywhere ... -
Multipoint observation of the response of the magnetosphere and ionosphere related to the sudden impulse event on 19 November 2007
(Journal of Space Weather Space Climate, 5, A13, 2015-05-18)The aim of this study is to provide a complete scope of a magnetic sudden impulse (SI) event along its way through interplanetary space and the magnetosphere until its arrival to the ground. In our case, ...