An investigation of E and F-region changes over Arecibo induced by a geomagnetic storm
Abstract
In this study, we examine the effects of a strong geomagnetic disturbance on the ionosphere and mesospheric region. During this storm, the Dst index fell below -120 nT on Aug 5, 2011. The electron density (Ne) concentrations obtained using Incoherent Scatter Data at Arecibo revealed interesting features during the main phase of the storm with decreasing densities in the F-region along with an increase in Ne at E-region altitudes. The Ne in the F-region displayed strong fluctuations in Ne while strong descending layers in the valley region were observed along the main and recovery phase of this event. We will also present Na resonance lidar data that showed structures that appeared to be like Kelvin-Helmholz type instabilities occurring between 101-108 km during the recovery phase of the storm.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFMSA31C3444R
- Keywords:
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- 0305 Aerosols and particles;
- ATMOSPHERIC COMPOSITION AND STRUCTUREDE: 0340 Middle atmosphere: composition and chemistry;
- ATMOSPHERIC COMPOSITION AND STRUCTUREDE: 3303 Balanced dynamical models;
- ATMOSPHERIC PROCESSESDE: 3332 Mesospheric dynamics;
- ATMOSPHERIC PROCESSES