Diapositivas presentadas en el XIII Encuentro Científico Internacional, (ECI 2010i), realizado del 2 al 6 de agosto de 2010 en la ciudad de Lima.

Ponencia presentada en el 2010 CEDAR Workshop, University of Colorado, Boulder, CO, 20-25 June 2010.

Presentación interna del Radio Observatorio de Jicamarca-IGP.

En el presente reporte se detalla los cambios realizados al instrumento óptico Interferometro Fabry-Perot de la estación óptica del Radio Observatorio de Jicamarca (11°57'31.38"S, 76°51'36.84"W) mediante los cuales se ha incrementado su sensibilidad al doble de órdenes interferométricos de la línea OI de la luminiscencia nocturna.

We used reanalyzed Jicamarca radar measurements to study the response of equatorial ionospheric electrodynamics and spread F during the main phase of the large September 2017 geomagnetic storm. Our observations near dusk on 7 September show very large upward drifts followed by a large short-lived downward drift perturbation that completely suppressed the lower F region plasma irregularities and severely decreased the backscattered power from the higher altitude spread F. We suggest that this large short-lived westward electric field perturbation is most likely of magnetospheric origin and is due to a sudden and very strong magnetic field reconfiguration. Later in the early night period, data indicate large, mostly upward, drift perturbations generally consistent with standard undershielding and overshielding electric field effects, but with amplitudes significantly larger than expected. ...

Poster presented at the 2021 CEDAR Virtual Workshop, June 20-25.