E tv s lor nd geophysical institute founded in 1907
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Eötvös Loránd Geophysical Institute founded in 1907. baron Loránd Eötvös (1848-1919). Hydrocarbon exploration „ The most common torsion balance employed in the early hunt for oil in Texas was designed by Baron von Eoetvoes in Hungary „ (first success 1924). Eötvös – effect (1907).

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Eötvös Loránd Geophysical Institute founded in 1907

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E tv s lor nd geophysical institute founded in 1907

Eötvös Loránd Geophysical Institutefounded in 1907

baron Loránd Eötvös (1848-1919)

Hydrocarbon exploration

„The most common torsion balance employed in the early hunt for oil in Texas was designed by Baron von Eoetvoes in Hungary„ (first success 1924)

Eötvös – effect (1907)

torsionbalance

Eötvös – unit

(gravitational gradient)

Equivalence of inertial and gravitational mass up to 1:200 000 000 precision (1909)


Organisational stucture of elgi

Organisational stucture of ELGI

ELGI:

~ 80 researchers

Earth Physics Departement:

7 researcher

1 technician


Space research at elgi

Space research at ELGI

  • 1. Observations (Tihany Geophys. Obs.)

    • Geomagnetic observations (INTERMAGNET)

    • Observation of ULF waves (pulsations)

    • Coordination of MM100 magnetometer array

    • Observation of TRIMPIs (ELTE SRG)

    • Observation of VLF whistlers (ELTE SRG)

  • 2. ULF research

    • Solar-wind driven upstream waves and upstream wave related pulsations (UWs)

    • Field line resonances (FLRs)

  • 3. Nonlinear phenomena in the solar wind and in the magnetosphere

    • Turbulence

    • Chaos

    • Hot Flow Anolamies, etc.


Upstream source of dayside pc3s

Upstream source of dayside Pc3s

BIMF

vsw

Upstream waves

k

θBx

vsw> vA

super-Alfvenic flow

reflected ions


Upstream waves

Upstream waves

  • UW related geomagnetic pulsations

    • drivers of FLRs

    • their relation to upstream SW/IMF parameters

      • frequency ~ |Bimf|

      • occurrence ~ direction of Bimf, Np, vsw

    • first automated UW detection algorithm

      • ground-based

      • observations at LEO (CHAMP)

    • first empirical model of UW related ground Pc3 activity

Global distribution of compressional Pc3 power at LEO (Heilig et al. 2007, AnnGeo)

Empirical model of UW related Pc3 activity (Heilig et al. 2010, AnnGeo)


Field line resonances

Field line resonances

  • Semi-automated FLR detection (based on Berube et al. JGR 2003)

  • Plasma mass density estimations (Schulz JGR 1996)

    • Simple magnetic and plasma model

  • Seasonal and solar cycle variation of plasma mass density

  • Combining ULF-VLF methods


Mm100 quasimeridional magnetometer array

MM100 – quasimeridional magnetometer array

Initiated in 2001:

Coordinated observation of ULF waves

> 1 Hz magnetic data


Mm100 stations

MM100 stations


Activities in plasmon

Activities in PLASMON

  • ELGI

    • Participates dominantly in WP2

      • Installation of 2 new ULF stations

      • Coordination of MM100 observations

      • Develop tools for FLR identification

      • Develop inversion methods

      • Cross calibration of ULF and VLF methods

    • WP1: ELGI will host an AWDANet node az Tihany Geophysical Observatory

    • WP3, WP4: by supplying plasma mass densities

    • WP5: dissemination of the results


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