Contributions to Geophysics and Geodesy Volume 31, No. 1, 2001
	In this issue the presentations at the IXth IAGA Workshop   held on June 12-18, 2000 at the Hurbanovo Geomagnetic Observatory and Smolenice Castle, Slovakia are published.
	Preface    (abstract)
	History of  Observatories
		Prigancová A., Vörös Z.: On 100-year history of the Hurbanovo Geomagnetic Observatory     (abstract)
		Schulz G.: From Deutsche Seewarte Hamburg to GeoForschungsZentrum Potsdam – Wingst Geomagnetic Observatory during six decades    (abstract)
		Mandea M.: French magnetic observation and theory at the time of De Magnete     (abstract)
		Vujnović V., Marić K.: An overview of measurement activities in geomagnetism in Croatia    (abstract)
	Component Magnetometers
		Schott J. J., Boulard V., Píres A., Cantin J. M., Bitterly J.: Magnetic component measurements with the DIDD     (abstract)
		Schott J. J., Leroy P.: Orientation of the DIDD magnetometer    (abstract)
		Marianiuk J., Reda J.: Recording magnetic pulsations with quartz -variometer-based and induction magnetometers    (abstract)
		Auster H.-U., Magnes W.: Comparison of magnetic field measurement techniques on Earth, Mars, Mercury and comet P/Wirtanen    (abstract)
		Magnes W., Auster H.-U.: Comparison of two digital flux-gate magnetometers developed for space application    (abstract)
		Marussenkov A.: Comparison of geophysical magnetometers    (abstract)
		Csontos A., Hegymegi L., Heilig B., Körmendi A.: The test results of the delta "I" delta "D" (DIDD) measurement system at the Tihany Geomagnetic Observatory of ELGI    (abstract)
	Absolute Instruments / Calibration Facilities
		Hrvoic I.: Standardization of total field magnetometers    (abstract)
		Slocum R. E., Smith E. J.: Advances in optically pumped helium magnetometers for space and Earth science    (abstract)
		Curto J. J., Sanclement E.: Levelling error corrections to D-measurements in DI-flux magnetometers    (abstract)
		Sapunov V., Denisov A., Denisova O., Saveliev D.: Proton and Overhauser magnetometers metrology    (abstract)
		Tomlinson L. A.: Using an old brass theodolite for a declination and inclination magnetometer - how good is it?    (abstract)
		Pajunpää K., Bitterly J., Linthe H.-J., Korepanov V.: Absolute measurements: comparative study of instrumentation    (abstract)
	Observatory Practice
		Papitashvili V. O.: Geomagnetic coordinates and geomagnetic time    (abstract)
		Linthe H.-J.: How  geomagnetic observatories present collected data    (abstract)
		Hejda P., Horáček J.: On the industrial noise of the geomagnetic field in Prague     (abstract)
		Clark T. D. G., Kerridge D. J.: Geomagnetic data for the power transmission and offshore drilling  industries    (abstract)
		Riddick J. C., Carrigan J. G.: A comparison of observatory fluxgate magnetometers and proton  magnetometers deployed in D/I coil systems     (abstract)
		Guya N. H.: Planning a new magnetic observatory in Iran (extended abstract)     (abstract)
		Bitterly J., Bitterly M., Mandea M.: Study of baseline values over long-time period at Chambon la Foret observatory    (abstract)
		Zaitzev A. N., Odintsov V. I., Petrov V. G., Amiantov A. S.: Geomagnetic data collection and real-time field monitoring at IZMIRAN    (abstract)
		Pulz E., Linthe H.-J.: Protection distances between magnetometers    (abstract)
		Váczyová M.: Comparison of the digital variometer systems at the Hurbanovo Geomagnetic Observatory    (abstract)
		Carrigan J. G.: A portable geomagnetic observatory to improve the distribution of global field measurements    (abstract)
		Hernández-Quintero E., Campos-Enríquez O., Cifuentes Nava G.: A comparison between satellite data and data from geomagnetic stations over Mexico    (abstract)
		Torta J. M., Gaya-Piquí L. R., Riddick J. C., Turbitt C. W.: A partly manned geomagnetic observatory in Antarctica provides a reliable data set    (abstract)
	Secular Variations / IGRF / Magnetic Maps / Magnetic Survey
		Mandea M.: How well is the main-field secular variation known?    (abstract)
		Gianibelli J. C., Cabassi I. R.: Secular variation modeling at Trelew Magnetic Observatory (Chubut,  Argentina)     (abstract)
		Division V (IAGA), Working Group 8: International Geomagnetic Reference Field – 2000    (abstract)
		Mihajlovich S., Cholakov I.: Secular variations of the geomagnetic field during the 19–21 solar cycles (extended abstract)    (abstract)
		Catalán M., Davila J. M.: On technical aspects concerning the geomagnetic surveying at Balearic sea and Valencia trough: ZEEE project    (abstract)
		Korte M.: External influences in regional magnetic surveys    (abstract)
		Berger J., Blamouser N., Duma G., Leichter B.: The geomagnetic survey of Austria 1995-1998    (abstract)
		Maksymchuk V.: A study of the geomagnetic secular variation in Europe    (abstract)
	Magnetic Indices and Geomagnetic Data Processing
		Menvielle M.: Recent and future evolution in geomagnetic indices derivation and dissemination    (abstract)
		McLean S. J., Papitashvili V. O.: Data archive and exchange through the World Data Center system    (abstract)
		Menvielle M., Paris J.: The al longitude sector geomagnetic indices    (abstract)
		Heilig B., Csontos A., Kovács P.: The geomagnetic effect of the solar eclipse of August 11, 1999    (abstract)
		Střeštík J.: The effect of the August 11, 1999 total solar eclipse on the geomagnetic field     (abstract)
		Střeštík J.: The effect of the August 11, 1999 total solar eclipse on geomagnetic pulsations    (abstract)
		Valach F., Jankovičová D.: Electromagnetic transfer functions, tectonic activity and neural networks    (abstract)
		Jankovičová D., Dolinský P., Valach F., Vörös Z.: Neural network based nonlinear determination of the  AE index     (abstract)
		Vörös Z., Váczyová M., Gianibelli J. C., Cabassi I. R.: Geomagnetic diagnosis of the Earth's  fluid core turbulence on the basis of large deviations    (abstract)
		Sumaruk Yu. P.: On external sources of secular variations of the Earth's magnetic field (extended abstract)    (abstract)
		Sumaruk P. V.: Secular variations of the Earth's magnetic field and their long-term modulation (extended abstract)    (abstract)
		Palka A., Reda J.: A method for elimination of disturbances caused by leakage currents in a telluric line    (abstract)
		Turbitt C. W.: Data collection, recording and transmission methods employed by the BGS geomagnetic loggers    (abstract)
		Kovács P., Vörös Z.: Geomagnetic diagnosis of the magnetosphere and its dynamical interaction with the solar wind    (abstract)
		Vörös Z., Kovács P.: Multiscale approaches in magnetospheric physics and their impact on geomagnetic data processing    (abstract)
		Kuznetsova V., Klymkovych T.: Application of high-accuracy magnetometry to study recent geodynamic processes and earthquake precursors    (abstract)
	INTERMAGNET
		Coles R. L.: INTERMAGNET - Its current status and its role in the geomagnetic community    (abstract)
		Rasmussen O.: INTERMAGNET OpsCom activities. Geomagnetic standards for instruments and observatories; geomagnetic formats    (abstract)
		Váczyová M., Palka A., Reda J.: Magnetic data collection system for INTERMAGNET at Hurbanovo    (abstract)
	Evaluation of Comparison Measurements and World-Wide Network of Observatories
		Váczyová  M., Vörös Z.: Results of Diflux and proton magnetometer comparison at the IXth IAGA Workshop    (abstract)
		Rasson J. L.: The status of the world-wide network of magnetic observatories, their location and instrumentation    (abstract)