radio spikes

LOFAR imaging spectroscopy reveals spike-like repeating radio burst pairs in the solar corona by Suli Ma et al.

June 17, 2026

The solar atmosphere is a turbulent and magnetized environment, with the release of magnetic energy readily manifesting as emission across the electromagnetic spectrum. Solar radio emission dominates the radio sky, with the brightest solar radio bursts generated via the plasma emission process. The emission has a complex frequency-time structure with many features that are yet to be understood. Observations Using the LOw Frequency ARray (LOFAR) radio telescope (van Haarlem et […]

Magnetic Field Geometry and Anisotropic Scattering Effects to Explain Puzzling LOFAR Solar Radio Burst Observations by D. L. Clarkson et al.

February 4, 2025

Solar radio bursts are an indirect signature of accelerated electron beams from the solar atmosphere. These fast electrons generate Langmuir waves as they propagate through a decreasing plasma density and ultimately lead to the bright broadband radio emissions with a characteristic fast frequency drift in dynamic spectra. Density turbulence in the plasma can modulate this process, producing fine structures such as sub-second, narrowband striae and spikes. These fine structures may […]

Periods and frequency drifts of groups of narrowband decimetric spikes by M. Karlický, J. Dudík and J. Rybák

October 2, 2024

The narrowband decimetric spikes belong to the most interesting solar radio bursts, because they are connected to the primary flare process.  Their brightness temperature is up to 1015 K. In the radio spectrum, they occur in clouds of many narrowband bursts with a relative bandwidth of about 1-3 % and duration less than 100 ms (Benz, 1986). Many models of these spikes were proposed, such as those based on the […]

Automated Detection and Statistical Study of Solar Radio Spikes by P.R. Lv et al

April 26, 2023

Solar radio spikes’ most typical observational features are their short duration and narrow bandwidth. They appear on the solar radio dynamic spectrogram as a large number of narrow-band type-III bursts, spikes, dots, sub-second clumps, groups, chains, and other narrow-band structures from decimeter to decameter wavelengths (Feng et al.(2018), Tan et al.(2019)). We have improved the YOLOv5s network model for these characteristics by adding inclined bounding frames and attention and feature […]

Solar Radio Spikes and Type IIIb Striae Manifestations Triggered by a Coronal Mass Ejection by Clarkson et al

April 11, 2023

Radio bursts are frequently emitted in the outer solar corona due to the acceleration of energetic electrons in solar flares and coronal mass ejections (CME). The shortest observed bursts are radio spikes, which have narrow spectral widths and are emitted over decades in frequency. Despite being studied for many years, imaging observations are sparse and restricted to localisation of the emission at decimetre frequencies (e.g. Benz, 2002). Recently, LOw Frequency […]