30 November 2025 to 5 December 2025
Building 40, Room 153
Australia/Sydney timezone
AIP Summer Meeting 2025 - University of Wollongong

A Machine Learning Framework for Building a Refined GOES Flare Catalog

2 Dec 2025, 17:30
15m
Building 67 (Room 104)

Building 67

Room 104

Contributed Oral Solar Terrestrial and Space Physics Solar Terrestrial and Space Physics

Speaker

Nastaran Farhang (University of Sydney)

Description

We present a new catalog for solar flares derived from Geostationary Operational Environmental Satellite (GOES) data using a deep learning–based detection method. Unlike the conventional rule-based methods, our approach identifies flare rises directly from the time series with a model that integrates multi-scale convolutional layers, a bidirectional long short-term memory (BiLSTM), and Transformer encoders. Trained on 7,700 manually labeled events and applied to GOES/XRS observations from 2018 to mid-2025, the method detects 201,463 flares, far exceeding the 14,612 listed in the GOES archive. The greatest relative increase appears for C-class events, many of which are often overlooked. Background subtraction of peak fluxes produces more symmetric waiting-time statistics, reducing bias from obscuration, while Bayesian-block analysis highlights strong temporal variability in flare rates. A complementary procedure links detected events to active regions using Solar Dynamics Observatory imaging. Together, these advances provide a more complete and less biased picture of flare occurrence, with potential applications for flare forecasting and solar-activity modeling.

Author

Nastaran Farhang (University of Sydney)

Co-authors

Prof. Michael Wheatland (University of Sydney) Prof. Andrew Melatos (University of Melbourne)

Presentation materials

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