Articles | Volume 35, issue 5
https://doi.org/10.5194/angeo-35-1165-2017
https://doi.org/10.5194/angeo-35-1165-2017
Regular paper
 | 
27 Oct 2017
Regular paper |  | 27 Oct 2017

Evidence of prompt penetration electric fields during HILDCAA events

Regia Pereira Silva, Jose Humberto Andrade Sobral, Daiki Koga, and Jonas Rodrigues Souza

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In this work the response of the Brazilian equatorial ionosphere is studied during three HILDCAA events that occurred in the year of 2006 using the digisonde data. Geomagnetic indices and interplanetary parameters were used to calculate a cross-correlation coefficient between the Ey and the hmF2. The results showed that the pumping action of particle precipitation into the auroral zone has moderately modified the equatorial hmF2, being more sensitive during PRE time.