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The International Real-time Magnetic Observatory Network (INTERMAGNET) is a world-wide consortium of institutes operating ground-based magnetometers recording the absolute level of the Earth's time-varying magnetic field, [2] [3] [4] to an agreed set of standards. INTERMAGNET has its roots in discussions held at the Workshop on Magnetic ...
The International Real-time Magnetic Observatory Network, with over 100 interlinked geomagnetic observatories around the world, has been recording the Earth's magnetic field since 1991. The military determines local geomagnetic field characteristics, in order to detect anomalies in the natural background that might be caused by a significant ...
Download as PDF; Printable version; ... This page is a list of network theory topics. Network theorems ... Scale-free network; Small-world network;
The official planetary K p-index is derived by calculating a weighted average of K-indices from a network of 13 geomagnetic observatories at mid-latitude locations.Since these observatories do not report their data in real-time, various operations centers around the globe estimate the index based on data available from their local network of observatories.
The basic principle for the generation of GIC: variations of the ionospheric currents (I(t)) generate an electric field (E(t)) driving GIC. Shown are also real GIC recordings from the Finnish natural gas pipeline. A time-varying magnetic field external to the Earth induces telluric currents—electric currents in the conducting ground. These ...
Like the North Magnetic Pole, the North Geomagnetic Pole attracts the north pole of a bar magnet and so is in a physical sense actually a magnetic south pole. It is the center of the 'open' magnetic field lines which connect to the interplanetary magnetic field and provide a direct route for the solar wind to reach the ionosphere.
The First Order World Gravity Network was established by use of absolute gravimeters as primary reference stations. [ 14 ] [ note 2 ] For most of the project's existence aircraft were operated by VXN-8 based at Naval Air Station Patuxent River, Maryland with civilian experts from the Naval Oceanographic Office were assigned to the missions for ...
Because it occurred approximately 42,000 years ago, the period has been termed the Adams Event or Adams Transitional Geomagnetic Event, a tribute to science fiction writer Douglas Adams, who wrote in The Hitchhiker's Guide to the Galaxy that "42" was the answer to life, the universe and everything.