30 November 2025 to 5 December 2025
Building 40
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
Hope Theatre (Building 40)

Hope Theatre

Building 40

University of Wollongong Northfields Avenue Wollongong NSW 2522
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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