A Catalog of Metric Type II Radio Bursts Detected by RSTN During Solar Cycle 24

In this study, we compile a catalog of metric type II radio bursts using the Radio Solar Telescope Network (RSTN) to study the occurrence, associations, and properties of the emission and their parent solar activity phenomena. According to the intensity and clarity of the radio emission features, we have divided the m-type II radio bursts into two qualitative categories, namely certain and uncertain. We analyzed RSTN data in Solar Cycle 24 (2009 - 2019), which is freely available from four worldwide stations: Learmonth, Sanvito, Sagamore Hills, and Palehua. Through careful visual inspection, we have collected all metric type II bursts detected in the range of 25 - 180 MHz. The relationships between these bursts and solar eruptive events, such as solar flares and coronal mass ejections (CMEs), are studied, and the results are presented and discussed. The outcomes could be used to reveal the occurrence of solar and space-weather activities based on the ground-based radio perspective. The newly assembled catalog of metric type II and associated solar events will be made freely available to the solar scientific community.