A5016555963- Geomagnetism and Paleomagnetism Studies
- Geology and Paleoclimatology Research
- Geophysical and Geoelectrical Methods
- Archaeological and Geological Studies
- Earthquake Detection and Analysis
- Geophysics and Gravity Measurements
- Archaeological and Historical Studies
- Geological and Geochemical Analysis
- Solar and Space Plasma Dynamics
- earthquake and tectonic studies
- Seismology and Earthquake Studies
- Maritime and Coastal Archaeology
- Magnetic and Electromagnetic Effects
- Geological and Geophysical Studies
- Ionosphere and magnetosphere dynamics
- Image Processing and 3D Reconstruction
- Pleistocene-Era Hominins and Archaeology
- Archaeology and ancient environmental studies
- Astro and Planetary Science
- Medieval Architecture and Archaeology
- Ancient and Medieval Archaeology Studies
- Geological and Geophysical Studies Worldwide
- Scientific Research and Discoveries
- Statistical and numerical algorithms
- Complex Systems and Time Series Analysis
Instituto de Geociencias
2012-2024
Universidad Complutense de Madrid
2013-2024
Consejo Superior de Investigaciones Científicas
2018-2024
Istituto Nazionale di Geofisica e Vulcanologia
2013-2019
Charles River Laboratories (Netherlands)
2018
Abstract In December 2019, the International Association of Geomagnetism and Aeronomy (IAGA) Division V Working Group (V-MOD) adopted thirteenth generation Geomagnetic Reference Field (IGRF). This IGRF updates previous with a definitive main field model for epoch 2015.0, 2020.0, predictive linear secular variation 2020.0 to 2025.0. letter provides equations defining IGRF, spherical harmonic coefficients this model, maps magnetic declination, inclination total intensity their predicted rate...
The available European database of archeomagnetic field values and instrumental data has been used to produce a regional model for the geomagnetic in Europe last 3000 years (from 1000 B.C. 1900 A.D., connecting with epoch covered by IGRF models). This new model, SCHA.DIF.3K, constitutes an improvement respect previous SCHA.DI.00‐F, which relocated was only valid 2000 years. obtained least sums absolute deviation inversion paleomagnetic using spherical cap harmonics spatial representation...
Abstract The production of quasi‐definitive data at Ebre observatory has enabled us to detect a new geomagnetic jerk in early 2014. This been confirmed by analyzing several observatories the European‐African and Western Pacific‐Australian sectors classical fashion looking for characteristic V shape secular variation trend. A global model produced with latest available satellite supports these findings, giving perspective on both related acceleration pulse core‐mantle boundary. We conclude...
Abstract The study of the preparation phase large earthquakes is essential to understand physical processes involved, and potentially useful also develop a future reliable short-term warning system. Here we analyse electron density magnetic field data measured by Swarm three-satellite constellation for 4.7 years, look possible in-situ ionospheric precursors interactions between lithosphere above atmosphere ionosphere, in what called Lithosphere-Atmosphere-Ionosphere Coupling (LAIC). We...
The South Atlantic Anomaly is nowadays one of the most important features Earth's magnetic field. Its extent area at surface continuously growing since intensity instrumental measurements are available covering part Southern Hemisphere and centred in America. Several studies associate this anomaly as an indicator upcoming geomagnetic transition, such excursion or reversal. In paper we carry out a detailed study about issue using recent models that also include data from last ESA mission...
We analyse Swarm satellite magnetic field and electron density data one month before after 12 strong earthquakes that have occurred in the first 2.5 years of mission lifetime Mediterranean region (magnitude M6.1+) or rest world (M6.7+). The search for anomalies was limited to area centred at each earthquake epicentre bounded by a circle scales with magnitude according Dobrovolsky’s radius. define statistically terms specific thresholds respect same statistical quantity along whole residual...
Abstract In this work, we present 16 directional and 27 intensity high‐quality values from Iberia. Moreover, have updated the Iberian archeomagnetic catalogue published more than 10 years ago with a considerable increase in database. This has led to notable improvement of both temporal spatial data distribution. A full vector paleosecular variation curve 1000 BC 1900 AD been developed using within radius 900 km Madrid. hierarchical bootstrap method followed for computation curves. The most...
Abstract Following the observed pattern of a new geomagnetic jerk every 3–4 years, certain predictions suggested that event should occur around 2020 after one 2017.5. In this work, we explore scenario by analysing secular variation East field component in both ground and satellite data. At ground, use available data from 2015 to 2021 10 observatories worldwide distributed. This analysis shows occurrence mentioned mid-2017 at located Pacific region, but also reveals between mid-2019 early...
The continuous update of the archeomagnetic database spanning last 3,000 years has facilitated refinement geomagnetic field models, unveiling presence significant non-dipolar anomalies before instrumental measurements. Within Holocene epoch, two have become notably well-defined. South Atlantic Anomaly (SAA), characterized by low intensities in region almost during millennium, stands out as most present-day anomaly. In addition, Levantine Iron Age (LIAA) been defined a spike abnormally high...
We have developed a first low‐degree regional geomagnetic model for the European continent valid period 6000–1000 B.C. from selected compilation of sedimentary and archeomagnetic data (the SCHA.DIF.8K model). This provides information about both direction (declination inclination) intensity Earth's magnetic field. By connecting it with our previous model, SCHA.DIF.3K, 1000 to 1900 A.D., IGRF, we furnish continuous field last 8000 years in Europe. It has been using Revised Spherical Cap...
Abstract Since the publication of European archaeomagnetic field model SCHA.DIF.3k in 2009, number paleomagnetic data derived from archaeological materials such as baked clays and volcanic rocks coming Europe has increased by about 90% for directions around 180% intensities. Taking advantage this increase, here we provide an updated regional model, called SCHA.DIF.4k, continent adjacent areas now covering last four millennia. To three geomagnetic elements, declination, inclination,...
A R Y New full-vector archaeomagnetic data for North Africa recovered from the study of six kilns, five Tunisia and one Morocco, are presented.Archaeological historical considerations, along with three radiocarbon dates, indicate that age kilns ranges between 9th 15th centuries AD.Rock magnetic analyses showed principal carriers magnetite low Ti titanomagnetite, variable contributions thermally stable maghemite a high coercivity phase unblocking temperatures.The mineralogy studied material...
Abstract One of the main challenges paleomagnetic research is to obtain high‐resolution geomagnetic field intensity reconstructions. For last millennia, these reconstructions are mostly based on archeomagnetic data. However, quality data available in databases very variable, and high scatter observed records clearly suggests that some them might not be reliable. In this work we investigate how and, hence, our present knowledge past, affected by selected for modeling Earth's magnetic field....