1. Slovak Repeat Stations – 2006.5 Epoch Fridrich Valach, Peter Dolinský, Magdaléna Váczyová Hurbanovo Geomagnetic Observatory GPI SAS, Slovak Republic The Slovak repeat station network consists of six stations. It was reoccupied in the middle of 2006. The magnetic measurements were carried out using DI-flux theodolite (Zeiss Theo 015B theodolite with Elsec 810 magnetometer) and EDA proton precession magnetometer (PPM). The data were reduced to the 2006.5 epoch using magnetograms of the Hurbanovo Magnetic Observatory. We assumed the transient variations of the magnetic field to be identical on the territory of Slovakia and to be equal to the variation at Hurbanovo. An arbitrary element of the geomagnetic field at a station for the 2006.5 is E st,2006.5 = E st,t – (E HRB,t – E HRB,2006.5 ), where E st,t and E HRB,t are the values of the element at the time of measurement for the station and Hurba-novo Observatory, respectively, whereas E HRB,2006.5 is Hurbanovo’s element for the 2006.5 epoch. The geographical positions and altitudes of the stations are the following: Hurabnovo 47.88˚N, 18.20˚E, 112 m; Očkov 48.65˚N, 17.755˚E, 160 m; Rajec 49.09˚N, 18.65˚E, 487 m; Rimavská Sobota 48.375˚N, 20.02˚E, 239 m; Spišské Podhradie 49.00˚N, 20.73˚E, 520 m; Úbrež 48.79˚N, 22.125˚E, 140 m.StationDeclinationInclination Total Field Hurbanovo 3˚ 11.86΄ 64˚ 13.8΄ 48 307.8 nT Očkov 3˚ 07.18΄ 64˚ 53.5΄ 48 496.0 nT Rajec 3˚ 22.27΄ 65˚ 18.1΄ 48 646.8 nT Rim. Sobota 3˚ 46.59΄ 64˚ 49.6΄ 48 586.7 nT Spiš. Podhr. 3˚ 55.29΄ 65˚ 22.1΄ 48 789.0 nT Úbrež 4˚ 13.35΄ 65˚ 12.8΄ 48 815.0 nT Geomagnetic field elements D, I and F measured at the Slovak repeat stations, reduced to the 2006.5 epoch: Magnetic declination at the repeat stations since the 19 th century Horizontal component at the repeat stations since the 19th century Magnetic inclination at the repeat stations since the 19th century Total magnetic field at the repeat stations since the 19th century Linear model of the distribution of magnetic declination for epoch 2006.5 [in °], red lines, and its secular variation between epochs 2004.5 and 2006.5 [in ´/year], black lines, over the territory of Slovakia. Linear model of the distribution of horizontal component for epoch 2006.5 [in nT], black lines, and its secular variation between epochs 2004.5 and 2006.5 [in nT/year], violet lines, over the territory of Slovakia. Linear model of the distribution of magnetic inclination for epoch 2006.5 [in °], black lines, and its secular variation between epochs 2004.5 and 2006.5 [in ˝/year], blue lines, over the territory of Slovakia. Linear model of the distribution of total magnetic field for epoch 2006.5 [in nT], black lines, and its secular variation between epochs 2004.5 and 2006.5 [in nT/year], green lines, over the territory of Slovakia. References: L. R. Newitt, C. E. Barton, J. Bitterly: Guide for Magnetic Repeat Station Surveys. IAGA, Working Group V-8, 1996. F. Valach, M. Váczyová, P. Dolinský: New Slovak geomagnetic repeat station network. Earth, Planets and Space, 58/6, 751-755, 2006. Acknowledgments. This work was supported by grants VEGA 2/7008/27 and APVV-51-008505. Contact to the authors: fridrich@geomag.sk