3 research outputs found
Coronal shocks associated with CMEs and flares and their space weather consequences
We study the geoeffectiveness of 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 spectrograph, in the 100-650 MHz
range; the GOES SXR flares and SOHO/LASCO CMEs, were obtained from the Solar
Geophysical Data (SGD) and the LASCO catalogue respectively. These are compared
with changes of solar wind parameters and geomagnetic indices in order to
establish a relationship between solar energetic events and their effects on
geomagnetic activity.Comment: Universal Heliophysical Processes, Proceedings of the International
Astronomical Union, IAU Symposium, Volume 257, p. 61-6
Relation between coronal type II bursts, associated flares and CMEs
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 spectrograph (100-650 MHz range); the GOES SXR flares
and SOHO/LASCO CMEs, were obtained from the Solar Geophysical Data (SGD) and
the LASCO lists respectively. The radio burst-flare-CME characteristics were
compared and two groups of events with similar behavior were isolated. In the
first the type II shock exciter appears to be a flare blast wave propagating in
the wake of a CME. In the second the type II burst appears CME initiated though
it is not always clear if it is driven by the bow or the flanks of the CME or
if it is a reconnection shock.Comment: Universal Heliophysical Processes, Proceedings of the International
Astronomical Union, IAU Symposium, Volume 257, p. 299-30
Relation between coronal type II bursts, associated flares and CMEs
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 ARTEMISIV radio spectrograph (100-650 MHz range);
the GOES SXR flares and SOHO/LASCO CMEs, were obtained from the Solar
Geophysical Data, (SGD) and the LASCO lists respectively. The radio
burst-flare-CME characteristics were compared and two groups of events
with similar behavior were isolated. In the first, the type II shock
exciter appears to he a flare blast, wave propagating in the wake of a
CME. In the second the type II burst appears CME initiated though it is
not always clear if it is driven by the bow or the flanks of the CME or
if it is a reconnection shock