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High-resolution observations with ARTEMIS/JLS and the NRH: IV. Imaging spectroscopy of spike-like structures near the front of type-II bursts
S. Armatas, C. Bouratzis, A. Hillaris +5
Narrowband bursts (spikes) appear on dynamic spectra from microwave to decametric frequencies. They are believed to be manifestations of small-scale energy release through magnetic…
High resolution observations with Artemis--JLS, (II) Type IV associated intermediate drift bursts
C. Bouratzis, A. Hillaris, C. E. Alissandrakis +5
Aims. We examined the characteristics of isolated intermediate drift bursts (IMDs) and their morphologies on dynamic spectra, in particular the positioning of emission and absorpti…
Detection of spike-like structures near the front of type-II bursts
S. Armatas, C. Bouratzis, A. Hillaris +6
Aims. We examine high time resolution dynamic spectra for fine structures in type II solar radio bursts Methods. We used data obtained with the (SAO) receiver of the Artemis-JLS (A…
High resolution observations with Artemis-IV and the NRH. I. Type IV associated narrow-band bursts
C. Bouratzis, A. Hillaris, C. E. Alissandrakis +5
Narrow band bursts appear on dynamic spectra from microwave to decametric frequencies as fine structures with very small duration and bandwidth. They are thought to mark small scal…
A tiny event producing an interplanetary type III burst
C. E. Alissandrakis, A. Nindos, S. Patsourakos +2
We investigate the conditions under which small scale energy release events in the low corona gave rise to strong interplanetary (IP) type III bursts. We analyze observations of th…
Properties of solar energetic particle events inferred from their associated radio emission
A. Kouloumvakos, A. Nindos, E. Valtonen +6
We study selected properties of Solar Energetic Particle (SEP) events as inferred from their associated radio emissions. We used a catalogue of 115 SEP events that consists of entr…
Fine Structure of Metric Type-IV Radio Bursts Observed with the ARTEMIS-IV Radio Spectrograph: Association with Flares and Coronal Mass Ejections
C. Bouratzis, A. Hillaris, C. E. Alissandrakis +5
Fine structures embedded in type-IV burst continua may be used as diagnostics of the magnetic field restructuring and the corresponding energy release associated with the low coron…
CME Expansion as the Driver of Metric Type II Shock Emission as Revealed by Self-Consistent Analysis of High Cadence EUV Images and Radio Spectrograms
A. Kouloumvakos, S. Patsourakos, A. Hillaris +6
On 13 June 2010, an eruptive event occurred near the solar limb. It included a small filament eruption and the onset of a relatively narrow coronal mass ejection (CME) surrounded b…
The 17 January 2005 Complex Solar Radio Event Associated with Interacting Fast Coronal Mass Ejections
A. Hillaris, O. Malandraki, K. -L Klein +6
On 17 January 2005 two fast coronal mass ejections were recorded in close succession during two distinct episodes of a 3B/X3.8 flare. Both were accompanied by metre-to-kilometre ty…
Type II and IV radio bursts in the active period October-November 2003
V. Petoussis, P. Tsitsipis, A. Kontogeorgos +7
In this report we present the Type II and IV radio bursts observed and analyzed by the radio spectrograph ARTEMIS IV1, in the 650-20MHz frequency range, during the active period Oc…
Radio Bursts in the Active Period January 2005
K. Bouratzis, P. Preka-Papadema, A. Hillaris +5
We present complex radio bursts recorded by the radiospectrograph ARTEMIS-IV in the active period of January 2005. The wide spectral coverage of this recorder, in the 650-20 MHz ra…
Type II Shocks Characteristics: Comparison with associated CMEs and Flares
G. Pothitakis, E. Mitsakou, P. Preka-Papadema +8
A number of metric (100-650 MHz) typeII bursts was recorded by the ARTEMIS-IV radiospectrograph in the 1998-2000 period; the sample includes both CME driven shocks and shocks origi…
Ten Years of the Solar Radiospectrograph ARTEMIS-IV
C. Caroubalos, C. E. Alissandrakis, A. Hillaris +10
The Solar Radiospectrograph of the University of Athens (ARTEMIS-IV) is in operation at the Thermopylae Satellite Communication Station since 1996. The observations extend from the…
ARTEMIS IV Radio Observations of the 14 July 2000 Large Solar Event
C. Caroubalos, C. E. Alissandrakis, A. Hillaris +13
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…
Solar flares with and without SOHO/LASCO coronal mass ejections and type II shocks
A. Hillaris, V. Petousis, E. Mitsakou +10
We analyse of a set of radio rich (accompanied by type IV or II bursts) solar flares and their association with SOHO/LASCO Coronal Mass Ejections in the period 1998 2000. The inten…
Type III events, flares and CMEs, in the extremely active period October-November 2003
E. Mitsakou, M. Thanasa, P. Preka-Papadema +8
The type III observations trace the propagation of energetic electron populations through the Solar Corona which, more often than not, precede or are associated with energy release…
Relation between coronal type II bursts, associated flares and CMEs
George Pothitakis, Panagiota Preka-Papadema, Xenophon Moussas +5
We study a sample of complex events; each includes a coronal type II burst, accompanied by a GOES SXR flare and LASCO CME. The radio bursts were recorded by the ARTEMIS-IV radio sp…
Metric Radio Bursts and Fine Structures Observed on January 20, 2005
C. Bouratzis, P. Preka-Papadima, X. Moussas +4
A major radio event, associated with an X7.1/2B flare in AR720 and a fast CME was observed on January 20, 2005 with the radio-spectrograph ARTEMIS-IV; it was particularly intense a…
CME on CME Interaction on January 17, 2005
C. Bouratzis, P. Preka-Papadima, X. Moussas +5
On January 17, 2005 a complex radio event associated with an X3.8 SXR flare and two fast Halo CMEs (CME1 & CME2 henceforward) in close succession was observed. We present combined…
Radio Observations of the January 20, 2005 X-Class Event
C. Bouratzis, P. Preka-Papadema, A. Hillaris +3
We present a multi-frequency and multi-instrument study of the 20 January 2005 event. We focus mainly on the complex radio signatures and their association with the active phenomen…