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| Titel |
Possible seismogenic origin of changes in the ULF EM resonant structure observed at Teoloyucan geomagnetic station, Mexico, 1999-2001 |
| VerfasserIn |
A. Kotsarenko, O. Molchanov, R. Pérez Enríquez, J. A. López Cruz-Abeyro, S. Koshevaya, V. Grimalsky, I. Kremenetsky |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 5, no. 5 ; Nr. 5, no. 5 (2005-09-22), S.711-715 |
| Datensatznummer |
250002797
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| Publikation (Nr.) |
 copernicus.org/nhess-5-711-2005.pdf |
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| Zusammenfassung |
| The evolution of the ULF resonant structure observed at Teoloyucan
geomagnetic station has been provisionally studied in a possible relation
with seismic activity in Mexico in the period 1999-2001. Two resonant lines
were observed in the H-component (linear polarization) in the frequency
bands fR2=10.2–11.1 mHz and fR2=13.6–14.5 mHz, sometimes accompanied by other harmonics. The
source of the observed resonances is possibly related with the geomagnetic
location of the station (geomagnetic latitude λ=29.1°) and its
proximity to the equatorial electrojet (λ~30°). An enhancement of the
carrier frequency of both resonances in the period 1 month–2 weeks was
found before the strongest EQs. Also, a depression of the resonant structure
just a few days before and a few days after some EQs seems to be correlated
with seismic activity. |
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