Increasing demand within the geomagnetism community for high quality real-time or near-real-time observatory data means there is a requirement for data producers to have a robust and scalable data processing infrastructure capable of delivering geomagnetic data products over the Internet in a variety of formats. We describe a new software system, developed at BGS, which will allow access to our...

We present numerical dynamo models which qualitatively reproduce some structural characteristics of the present-day geomagnetic field. Timedependent convection in an electrically conducting, rotating spherical shell at Ekman numbers 1 3 x l0 -4 generates dipole-dominated magnetic fields, which exhibit distinct bundles of strong radial flux at high latitudes, low flux over the poles, and paired ...

Using the domino dynamo model, we show how specific axisymmetric and equatorial symmetric forms of the heat flux variations at the core-mantle boundary change the frequency of the geomagnetic field reversals. In fact, we are able to demonstrate the effect known from the modern 3D planetary dynamo models using an ensemble of interacting spins, which obey equations of the Langevin type with a ran...

Seafloor observatories have been the important way to observe the ocean, but applying the magnetometers to it still remain technical problems. This paper presents a smart cheaper magnetometer which was designed as the sensor node for a small seafloor network for geomagnetic observation. System design was described in modules at first. The calibration method of the whole system so as to alleviat...

A comprehensive study of geomagnetic field variations has been carried out at the dip equatorial latitudes of West Africa. The data obtained during the 1993 French participation in the International Equatorial Electrojet Year experiment in Africa was used for the analysis. Only the quiet condition was examined. Variation in the three geomagnetic field elements (H, D, and Z) showed more variabil...

We use recently acquired archival data to extend the IDV-index of long-term 6 geomagnetic activity. The new IDV series (IDV09) includes the years 1835-2009, vs. 7 1872-2004 for IDV05, with improved early data coverage, substantiating our earlier 8 work. Comparison of the IDV09-based HMF strength with other recent reconstructions of 9 solar wind B yields a strong consensus between series based o...

Oscillatory modes with the period of approximately 7–8 years were detected in monthly time series of sunspot numbers, geomagnetic activity aa index, NAO index and near-surface air temperature from several mid-latitude European locations. Instantaneous phases of the modes underwent synchronization analysis and their statistically significant phase coherence, beginning from 1950’s, has been obser...