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中国科学院国家空间科学中心揭示近10年来最大地磁暴产生机制
地磁暴 太阳风
2015/8/26
2015年3月17日和6月22日发生了本太阳活动周最大的两次地磁暴，度量地磁暴的Dst指数分别为−223 nT和−195 nT，这也是近10年来最大的两次地磁暴。全世界高纬地区迎来了两场绚丽的极光秀，极光爆发的地区甚至包括相对低纬的澳大利亚的Perth、美国的San Jose等。中国科学院国家空间科学中心空间天气学国家重点实验室研究员刘颍等人结合日冕成像观测和太阳风就地测量...
2015年3月17日和6月22日发生了本太阳活动周最大的两次地磁暴，度量地磁暴的Dst指数分别为 −223 nT 和 −195 nT，这也是近10年来最大的两次地磁暴。全世界高纬地区迎来了两场绚丽的极光秀，极光爆发的地区甚至包括相对低纬的澳大利亚的Perth、美国的San Jose等。中国科学院国家空间科学中心空间天气学国家重点实验室刘颍研究员等人结合日冕成像观测和太阳风就...
Magnetic Declination Chart 2006 of Europe–produced by the MagNetE Group
Main geomagnetic field Global and regional models Magnetic anomalies Instruments and techniques Data processing
2015/8/26
During its 4th Workshop in Helsinki in 2009 the Group for European Repeat Station Surveys, MagNetE, decided to produce a European Declination Chart 2006 which is based on the numerous magnetic repeat ...
How to control a temporary DIDD based observatory in the field?
Instruments and techniques Main geomagnetic field Geomagnetic field variations and reversals Magnetic anomalies Magnetic storms Main geomagnetic field
2015/8/26
One of the main challenges on the course of the repeat station surveys is to determine the spatial differences of the geomagnetic elements between the repeat stations and the reference observatory. Th...
Comparison of the reference mark azimuth determination methods
Geodetic (ellipsoidal) azimuth Astronomic azimuth Repeat station Reference mark GNSS CROPOS
2015/8/26
The knowledge of the azimuth of the reference mark is of crucial importance in the determination of the declination which is defined as the ellipsoidal (geodetic) azimuth of the geomagnetic meridian. ...
Secular variation on the territory of the Czech Republic and reduction of the magnetic survey to the epoch 2010.5
Magnetis survey Secular variation Repeat stations
2015/8/26
A recent stage of the magnetic surveying activities in the Czech Republic was started in the fifties by setting up a basic network of the first order. It consists of 199 points. Complete measurements ...
Repeat station data compared to a global geomagnetic field model
Geomagnetic repeat station data crustal bias
2015/8/26
Geomagnetic repeat station surveys with local variometers for improved data reductions have been carried out in Germany for about ten years. For nearly the same time interval the satellites Ørste...
Italian Magnetic Network and magnetic reference fields at 2010.0
Earth's magnetic field Geomagnetic map Magnetic surveys Magnetic repeat stations Secular variation
2015/8/26
The Istituto Nazionale di Geofisica e Vulcanologia (INGV) has systematically undertaken the task of making measurements of the Earth's magnetic field in Italy. By tradition and because of the elongate...
Influence of solar activity on magnetic network measurements
Magnetic repeat stations Solar activity Magnetic models
2015/8/26
The influence of solar activity on magnetic measurements taken during the Italian repeat station surveys performed in 1999/2000 and 2009/2010 has been investigated. A method to estimate the difference...
The last Hungarian repeat station survey was completed between October 2010 and February 2011. Declination, inclination and the total field were observed using one-axial DMI fluxgate magnetometer moun...
On the crustal bias of repeat stations in Romania
Geomagnetic field Secular variation Repeat station network Romania
2015/8/26
A magnetic induction model has been applied to recordings obtained in 2010 during the field campaigns for geomagnetic measurements at the 26 repeat stations of the Romanian secular variation network. ...
Croatian geomagnetic field maps for 2008.5 epoch
Geomagnetic networks Geomagnetic surveys Geomagnetic field Geomagnetic anomaly
2015/8/26
The status of the Croatian Geomagnetic Repeat Stations Network (CGRSN) and Croatian Geomagnetic Network for Field Mapping (CGNFM), completed in 2010, was described. Standard and new survey practices a...
The British Geological Survey is responsible for conducting the UK geomagnetic repeat station programme. Measurements made at the UK repeat station sites are used in conjunction with the three UK magn...
Ukrainian geomagnetic repeat station network and results of the field work reduced to the epoch 2005.5
Earth's magnetic field Repeat station Secular variation Magnetic declination
2015/8/26
The results of geomagnetic field components of the renewed Ukrainian repeat stations (RS) network are presented. The methods of absolute geomagnetic and astro-geodetic measurements are described. The ...
Effects of solar and geomagnetic activities on the sub-ionospheric very low frequency transmitter signals received by the DEMETER micro-satellite
Solar and geomagnetic activities Pre-seismic electromagnetic emissions
2015/8/24
In the framework of seismic precursor electromagnetic investigations, we analyzed the very low frequency (VLF) amplitude signals recorded by the Instrument Champ Electrique (ICE) experiment on board t...