Browsing Observatori de l'Ebre by Language "eng"
Now showing items 1-20 of 39
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A method for real-time identification and tracking of traveling ionospheric disturbances using ionosonde data: first results
(Journal of Space Weather Space Climate, 2020, 10, 2, 2020-01-20)Traveling Ionospheric Disturbances (TIDs) are wave-like propagating irregularities that alter the electron density environment and play an important role spreading radio signals propagating through ... -
A new approach to the hourly mean computation problem when dealing with missing data
(Earth Planet Sp (2009) 61: 945, 2009-10-19)Geomagnetic observatory records are unavoidably affected by primary data interruptions which, in turn, may have possible effects on the accuracy of the definitive data derived from them. One of the ... -
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 ... -
An example of operation for a partly manned Antarctic geomagnetic observatory and the development of a radio link for data transmission
(Annals of Geophysics, 2009. Vol. 52, 1 (Febrer), 2009-02)The experience acquired from more than ten years of operation of an Antarctic geomagnetic observatory is described along with the development of data transmission facilities. The observatory was deployed ... -
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 ... -
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 ... -
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 ... -
Behaviour of the quiet day geomagnetic variation at Livingston Island and variability of the Sq focus position in the South American-Antarctic Peninsula region
(2009-08-24)The characteristics of the regular daily variation at the relatively new geomagnetic observatory of Livingston Island have been studied. They include the seasonal and solar cycle variabilities. Studies ... -
Conductivities consistent with Birkeland currents in the AMPERE-driven TIE-GCM
(Marsal,S.(2015),Conductivities consistent with Birkeland currents in the AMPERE-driven TIE-GCM, J. Geophys. Res. Space Physics, 120, 8045–8065, doi:10.1002/ 2015JA021385., 2015-09-26)The Active Magnetosphere and Planetary Electrodynamics Response Experiment (AMPERE) satellite mission has offered for the first time global snapshots of the geomagnetic field-aligned currents with ... -
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 ... -
Detection of Solar Flares from the Analysis of Signal-to-Noise Ratio Recorded by Digisonde at Mid-Latitudes
(Remote Sensing, 2022, 14, 1898, 2022-04-14)This work proposes a new indirect method to detect the impact of solar flares on ionospheric sounding measurements, i.e., on the signal-to-noise ratio of ionospheric reflected radio signals. The method ... -
Expected Geomagnetically Induced Currents in the Spanish Islands Power Transmission Grids
(Space Weather, 2023-05-19)The aim of this study is to evaluate the geomagnetically induced current (GIC) hazard in the power networks of the Canary and Balearic archipelagos. This is done in order to strictly complete the detailed ... -
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 ... -
Geomagnetism at Ebro: Present and Future
(International Workshop “Challenges for Geomagnetism, Aeronomy and Seismology in the XXI Century". Roquetes (Baix Ebre), 29 Septiembre-1 Octubre 2004], 2004-10-01)Activities of research and services are performed at the magnetic section of Ebro Observatory. Most of the scientific projects are related to Solar_terrestrial Physics. Latest projects focused on Antarctic ... -
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 ... -
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 ... -
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 ... -
Midlatitude F region peak height changes in response to interplanetary magnetic field conditions and modeling results
(Blanch, E., and D. Altadill (2012), Midlatitude F region peak height changes in response to interplanetary magnetic field conditions and modeling results, J. Geophys. Res., 117, A12311, doi:10.1029/2012JA018009., 2012-12-13)The response of the electron density peak height of the F2 region, hmF2, to geomagnetic storms has been investigated and a characteristic behavior of the peak height disturbance in relation to local-time, ... -
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 ... -
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 ...