ARTEMIS IV Radio Observations of the 14 July 2000 Large Solar Event

TL;DR

This study analyzes a major solar event on July 14, 2000, using ARTEMIS-IV radio observations combined with space and ground data to investigate associated solar phenomena and energetic electron release.

Contribution

It provides a detailed analysis of radio emissions and their relation to solar flare and CME activity during the event, including high-resolution observations of pulsations and fiber bursts.

Findings

Energetic electrons were released 15-20 minutes after flare onset.

Radio emissions included broad-band continua, type IV bursts, and pulsating structures.

CME origin time coincides with electron release, but exact association remains uncertain.

Abstract

In this report we present a complex metric burst, associated with the 14 July 2000 major solar event, recorded by the ARTEMIS-IV radio spectrograph at Thermopylae. Additional space-borne and Earth-bound observational data are used, in order to identify and analyze the diverse, yet associated, processes during this event. The emission at metric wavelengths consisted of broad-band continua including a moving and a stationary type IV, impulsive bursts and pulsating structures. The principal release of energetic electrons in the corona was 15 20 min after the start of the flare, in a period when the flare emission spread rapidly eastwards and a hard X-ray peak occurred. Backward extrapolation of the CME also puts its origin in the same time interval, however, the uncertainty of the extrapolation does not allow us to associate the CME with any particular radio or X-ray signature. Finally, we present high time and spectral resolution observations of pulsations and fiber bursts, together with a preliminary statistical analysis.