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Low latitude ionosphere response to the 7 October 2015 event triggered by a solar wind stream interaction region

María Graciela Molina - UNT - CONICET; Sergio Dasso - UBA - CONICET, Argentina; Gustavo Mansilla - UNT-CONICET, Argentina; Jorge Namour - UNT, Argentina; Miguel A. Cabrera - UNT, Argentina; Enrico Zuccheretti - INGV, Italy 

Session: QV - Thermosphere-Ionosphere Interactions and Effects


Abstract

In this work, we present a study of the disturbances occurring on the ionosphere over a low latitude station in the southern hemisphere due to perturbations observed in the space environment of Earth on 07 October 2015. The study focuses on a multi-instrument approach with the objective of analyzing the complete chain of events from the sun to the upper atmosphere.

In particular, we study two ionospheric storms observed at the low latitude station of Tucumán, Argentina (26° 51' S, 65° 12' W). We observed a negative ionospheric storm followed by a positive ionospheric storm. The impact of the solar wind on the Earth’s environment is analyzed using geomagnetic data and proxies, combined with data acquired in the "Tucumán Low Latitude Observatory for Upper Atmosphere. Tucumán exhibits two major ionospheric features with great interest for space weather monitoring within the region: it is located under the south crest of the EIA and near SAMA.

We also investigate the solar and interplanetary drivers that triggered an intense geomagnetic storm (Kp=7). We find that the main responsible for this strong perturbation in the geospace was a Co-rotating Interaction Region (CIR) even when typically, ICMEs are the most geo-effective transient interplanetary events.



Approaching deadlines:

Registration opens:

16 July 2020

Abstract submission opens:

16 July 2020

European Space Weather Medals:

6 September 2020

Registration deadline:

25 September 2020

Registration deadline: [extended]

10 October 2020

Abstract submission deadline:

4 September 2020