Ondas de radio kilométricas de tipo II generadas por ECMs: relación con estructuras interplanetarias y grado de geoefectividad
Abstract
We analyzed dynamic spectra from the WAVES/TNR (Thermal Noise Receiver) detector onboard the Wind mission, between 01/01/2000 and 12/31/2012 to search for Type II kilometric events (kmTII). A data base was built in which we correlate the low-frequency radio emissions with interplanetary structures detected in situ potencially associated with these radio emissions. A total of 105 events was found, 32 of which are not catalogued in the type II Wind/WAVES list of events. Moreover, 46 events were associated with in situ detections of interplanetary coronal mass ejections (ICMEs), 36 of which presented magnetic cloud (MC) characteristics. For 74 events, the Disturbance Storm Time (Dst) value was obtained to study the geoeffectiveness of these events with an associated ICME or MC. For this set of interplanetary structures associated to kmTII, we found that those behind the most intense geomagnetic storms happened close to the solar activity maximum. We also find that some of the greatest storms can be attributed to ICMEs with MC characteristics. The shock-only events and the ICMEs without MC characteristics were associated with less powerful storms.
- Publication:
-
Boletin de la Asociacion Argentina de Astronomia La Plata Argentina
- Pub Date:
- July 2021
- Bibcode:
- 2021BAAA...62...31M
- Keywords:
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- Sun: coronal mass ejections (CMEs);
- solar–terrestrial relations;
- shock waves