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Search for solar energetic particle signals in the Mexico City neutron monitor database

Published online by Cambridge University Press:  05 July 2012

B. Vargas-Cárdenas  and
J. F. Valdés-Galicia
B. Vargas-Cárdenas
Affiliation:
Instituto de Geofísica, UNAM, México D.F., C.P. 04510. email: bernardo@geofisica.unam.mx
J. F. Valdés-Galicia
Affiliation:
Instituto de Geofísica, UNAM, México D.F., C.P. 04510. email: valdes@geofisica.unam.mx
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Abstract

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We performed a search for ground level solar cosmic ray enhancements on the full five minute database of the Mexico City neutron monitor using wavelet filters and two different statistical tests. We present a detailed analysis of the time series of November 2, 1992, where we found a previously unreported increment matching the onset time of the impulsive phase of the Ground Level Enhancement No. 54, thus providing evidence of an effective detection of high energy solar cosmic rays. This technique may help to find still undiscovered GLE signals in the Worldwide Neutron Monitor Database, to refine GLE spectra and, probably, to find a relationship between the latter and the solar cycle.

Keywords

Ground level enhancementssolar energetic particles
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S286: Comparative Magnetic Minima: Characterizing quiet times in the Sun and Stars , October 2011 , pp. 195 - 199
Copyright
Copyright © International Astronomical Union 2012

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