Ionospheric response to the space weather event of 18 November 2003 -- An investigation

TL;DR

This study investigates how solar flares and associated CMEs on 18 November 2003 affected the Earth's ionosphere, analyzing observational data to establish correlations with geomagnetic storm activity and solar wind variations.

Contribution

It provides a detailed analysis of ionospheric responses to specific solar flare events and their connection to geomagnetic disturbances, using multi-location observational data.

Findings

Ionospheric disturbances correlated with solar flare events.

Delay observed between solar events and geomagnetic storm response.

Associations confirmed through multiple observational datasets.

Abstract

The present study explores the ionospheric effects of the well cited solar flare events (M3.2, M3.9/2N) of 18 November 2003 associated with CMEs. The H{\alpha} observations of these flares (taken with 15 cm Solar Tower Telescope at ARIES, Nainital) have been analysed to see an association of these flare events with the geomagnetic storm occurred on 20 November 2003. The ionospheric data from Puerto Rico (18.5{\deg}N, 67.2{\deg}W), Dyess (32.4{\deg}N, 99.7{\deg}W) and Millstone Hill (42.6{\deg}N, 71.5{\deg}W) together with the disturbance storm time indices (Dst index) variability exhibited a corresponding associations having a delay in the solar wind parameters, triggered by these flare events.