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It is well known that geomagnetic field varies in time, as well as in space. Besides, the world magnetic models which are the main sources of information concerning the values of geomagnetic field elements in a particular place, we present more precise and accurate model of these elements covering the territory of Bulgaria. Our study uses information from the last absolute geomagnetic survey involving measurements in 473 points, secular data from Panagyurishte (PAG) and several other Intermagnet observatories near...

The results of instrumental observations of geomagnetic variations caused by eruption of Taal Volcano on January 12, 2020 are given. Its geographical coordinates is 14.002? N, 120.993? E. Taal volcano is located within the Macolod Corridor in the large convergence zone between the Eurasian and Philippine tectonic plates which is characterized by active volcanism, crustal thinning, extensive faulting and block rotations. The data in the form of one-minute interval means which are available on web-site of the INTERM...