Evidence of a new electromagnetic resonance discovered at Teoloyucan geomagnetic station, México?

Abstract

Evidence of a new geomagnetic resonant structure observed at Teoloyucan station, Mexico (TRS, Teoloyucan Resonant Structure) in the period 1999-2001, is presented in the paper. Two resonant lines were observed at the frequency bands fR2=10.2-11.1 mHz and fR2=13.6-14.5 mHz, sometimes accompanied by low and high level harmonics. The polarization of the resonant structure is purely linear: it appears in the H-component (horizontal component) only, and no resonant line is observed either in Z- or D-components (vertical and declination components). The intensity of the resonance structure displays certain time dependence, both resonant lines almost disappear during the period 10-18 UT (04-12 LT). No similar resonant structure was observed at the nearest to Teoloyucan (TEO) referent stations, such as Los Alamos (LAL, USA), and Jicamarca (JIC, Peru). It was shown that there is a correlation between the resonances and geomagnetic activity, and that there are changes in their structure at the time of majoare discussed.

Keywords

• Ionosphere waveguide
• electromagnetic resonance
• Alfvén velocity