First Report of Solar Radio Burst Events Detected by the SunRISE Ground Radio Lab

Authors: Liana Y. Zhou(Ann Arbor Skyline High School, MI; University of Michigan), S. Rajavelu-Mohan(Washtenaw Technical Middle College, Michigan), Z. Liu(University of Michigan), E. Schneider(Marquette Senior High School, Michigan), L. Cui(Ann Arbor Skyline High School, Michigan), M.I Costacamps-Rivera(Centro Residencial de Oportunidades Educativas de Mayagüez, Puerto Rico), Shirsh Lata Soni(University of Michigan), M. Akhavan-Tafti(University of Michigan), Susan T. Lepri(University of Michigan)

NASA’s Sun Radio Interferometer Space Experiment (SunRISE) is an array of six toaster-size CubeSats that will work together to study solar activity. SunRISE Ground Radio Lab (GRL), an outreach component of the SunRISE mission, aims to engage high school students through hands-on radio observation campaigns to study the mechanisms behind coronal mass ejections and solar flares and how they manifest in solar radio bursts. SunRISE GRL has distributed dual dipole antenna kits to eighteen high schools throughout the United States to collect and analyze solar radio burst data, ranging in frequency between 16 and 24 MHz. Here, we present an analysis of the first fourteen solar radio burst events observed using the antenna kit at Skyline High School in Ann Arbor, MI, from January through June of 2024. For each of the events, we first examine the intensity spectrum in the range of 16 to 24 MHz with denoising treatment to identify the start, end, and time interval of these solar radio burst events, and classify them into the radio burst types. Additionally, we analyze the intensity of the solar radio burst in multiple frequency channels, such as 16, 18, 20, and 22 MHz etc. We compare our events with the publicly-available solar radio burst dataset by the e-Callisto network. We also investigate the solar source of these radio burst events by examining the corona images captured by NASA’s SDO AIA 171Å instrument and GOES X-rays. Finally, we study the geomagnetic responses of the Earth to these radio bursts events by examining two storm indices –AE and Dst. We find that nine out of our fourteen events have a duration of about a few minutes, with the peak intensity in 20 MHz channel ranging from 6000 to 8600 dB which correspond to different classes of solar flares. All fourteen of the events are associated with solar eruptions occurring a few minutes before the events are observed. Ten out of these fourteen events have geomagnetic responses of over 20nT according to the negatively disturbed Dst index. Future direction will involve comparing the SunRISE GRL data to the SunRISE mission data. We will also continue to collect solar radio burst data using GRL antennas and connect them to their solar origins as well as their geomagnetic responses to establish the relationship between the Sun and the Earth in order to gather insight into the further understanding of space weather processes.