Continuous observations of geomagnetic field run by Institute of Geophysics PAS Jan Reda

1. PLASMON - Kick-off-meeting, Budapest, February 14..15, 2011 Continuous observations of geomagnetic field run by Institute of Geophysics PASJan Reda Institute of Geophysics Polish Academy of Sciences (IGFPAS)

2. Place of work: • - Parent organization: Institute of Geophysics Polish Academy of Sciences (acronym: IGFPAS) • - Head of Research Group for Geomagnetic Observationsin Central Geophysical Observatory at Belsk, ~50km south-west of Warsaw • Work interests: • - Methodology of geomagnetic observations: absolute measurements, recording of variation of geomagnetic field, data acquisition for geomagnetic observations, data processing in geomagnetic observatories • - Practical aspects of magnetotelluric soundings - Geomagnetic activity, e.g. indices of geomagnetic activity - works in Definitive Data subcommittee of INTERMAGNET program, collection ofdefinitive data and preparation of final compilation of yearly DVD containing data from all INTERMAGNET observatories (chairman of this subcommittee)

3. Institute of Geophysics PAS – main departments • Seismology • Physics of atmosphere • Hydrology and Hydrodynamics • Magnetism - modelling of electromagnetic induction processes within the Earth - paleomagnetic investigations - geomagnetic observations • Polar Research

4. Belsk (BEL) 1965 - as magnetic observatory 1992 – INTERMAGNET 2005 – MM100 network Hel (HLP) (1932) 1957 - as magnetic observatory 1999 – INTERMAGNET Hornsund (HRN) 1978 - as magnetic observatory 1993 – IMAGE network 2002 – INTERMAGNET Suwalki (SUW) Recording of changes of magnetic field without absolute control 2007 – MM100 Hornsund Hel Suwalki Belsk

5. Observation in frame of MM100 • Research magnetic pulsations based on the network of magnetometers located approximately on the magnetic meridian. • One per few months 1sec data are transmitted to Tihany (MM100 centre) • Belsk - since 2005 Suwałki - since 2007 • Close cooperation with Eotvos Lorand Geophysical Institute SUWAŁKI BELSK

6. Observation in frame of IMAGE network(International Monitor for Auroral Geomagnetic Effects) HORNSUND • The prime objectives of IMAGE are to study auroral electrojets and moving two-dimensional current systems. • Hornsund since 1993 • On average one per month 1sec data are transmitted to Helsinki (IMAGE centre)

7. Observations of Schumann resonance phenomena • Continuous recording of two horizontal elements of magnetic field and vertical element of electric field in the ELF frequency range • Sampling rate 100Hz • Continuous recording in Belsk and Hornsund since 2005 and 2004 respectively. • Close cooperation with Geodetic and Geophysical Research InstituteHungarian Academy of Sciences in Sopron HORNSUND (since 2004) BELSK (since 2005) NAGYCENK(since 1993)

8. Schumann resonance observations (Belsk, Hornsund) Hornsund Belsk Induction magnetometer

9. Field works • Magnetotelluric or geomagnetic deep soundings (usually each year) • Other field works as study of artificial magnetic disturbances caused by electric railway

10. Belsk (BEL) 1965 - as magnetic observatory 1992 – INTERMAGNET 2005 – MM100 network Hel (HLP) (1932) 1957 - as magnetic observatory 1999 – INTERMAGNET Hornsund (HRN) 1978 - as magnetic observatory 1993 – IMAGE network 2002 – INTERMAGNET Suwalki (SUW) Recording of changes of magnetic field without absolute control 2007 – MM100 Hornsund Hel Planned 3 new EMMA ULF stations in frame of PLASMON Suwalki Belsk

11. Hornsund - Absolute House – pavilion where are carried out magnetic absolute measurements

12. Belsk Observatory – main building

13. Köszönom Thank you