Type II solar radio bursts - CESRA: Community of European Solar Radio Astronomers

A solar jet-induced perturbation propagating through coronal loops and in-loop electron beam transport as indicated by type II and type N radio bursts by Xiangliang Kong

May 12, 2026

Solar type II radio bursts are slow-drifting emissions in radio dynamic spectra, traditionally interpreted as signatures of shock waves driven by fast coronal mass ejections (CMEs). They provide the primary diagnostics for energetic electron acceleration and transport in solar eruptions. However, a puzzling class of metric type II bursts occurs without any detectable CME and is linked only to relatively weak solar flares and small-scale jets. The fundamental question is: […]

Dataset for Recognition and Detection Based on Solar Radio Spectrogram Data by Yan et al

April 14, 2026

Solar radio bursts and their fine spectral structures contain key physical information related to plasma instabilities, high-energy particle acceleration, and other important processes. They therefore serve as an important observational means for studying solar activity and space weather. With the increasing volume of solar radio spectrogram observation data, deep learning-based recognition and detection of solar radio bursts have become a key research direction. However, most studies on meter-wave solar radio […]

Classification of Type II and Type III Solar Radio Bursts Using Transfer Learning by H. le Roux et al.

March 3, 2026

Solar radio bursts (SRBs) are some of the most interesting signatures of solar activity. Their correlation with large solar eruptions and well-documented disruption to technological infrastructure especially highlights their relevance (Temmer 2021; Li et al. 2024; Liang et al. 2024). As the volume of radio data grows, it becomes increasingly important to ensure that there are reliable automated methods for the classification of SRBs, especially if these methods can contribute […]

A Wide-Band High-Frequency Type-II Solar Radio Burst by Vasanth et al.

December 23, 2025

Type-II radio bursts are usually observed below 400 MHz with slowly-drifting narrow fundamental and/or harmonic bands. Events with starting frequencies higher than 400 MHz are rarely reported (e.g., Pohjolainen et al. 2008). Such high-frequency Type-IIs may stem from the CME interaction with surrounding dense structures in the corona, such as streamers, ray-like or loop structure, or from sources in the lower corona. Figure. 1. Dynamic spectrum of the high-frequency wide-band […]

On the limitations of using metric radio bursts as diagnostic tools for interplanetary coronal mass ejections by J. Kandekar et al.

September 30, 2025

Our Sun is constantly active, and much of its activity, like Solar Flares and Coronal Mass Ejections, is driven by its Magnetic Fields. However, one cannot directly estimate this magnetic field; one needs to employ various observational and radio techniques to estimate these magnetic fields (White 2004; Gopalswamy 2006). While radio-based techniques have been used to explore coronal magnetic fields in localised regions (e.g., using band-splitting in type II bursts; […]