The CGEM Lorentz Force Data from HMI Vector Magnetograms

Abstract

We describe a new data product from the CGEM (Coronal Global Evolutionary Model) collaboration that estimates the Lorentz force in active regions (ARs) based on HMI vector magnetogram patches. Following Fisher et al. (2012), we compute three components of the integrated Lorentz force over the outer solar atmosphere every 12 minutes throughout an AR's disk passage. These estimates, differenced during solar eruptive events, can provide valuable diagnostics on dynamic processes. We describe the pipeline modules, provide data retrieval examples, and document some systematic uncertainties that users should be aware of. Finally we document the formal uncertainty propagation procedures.

Documentation of the CGEM Lorentz force data product. Updated again in Jun 2022 to include the filling factor

References in corpus (3)

• The Helioseismic and Magnetic Imager (HMI) Vector Magnetic Field Pipeline: SHARPs -- Space-weather HMI Active Region Patches
• The Helioseismic and Magnetic Imager (HMI) Vector Magnetic Field Pipeline: Overview and Performance
• On the Coordinate System of Space-Weather HMI Active Region Patches (SHARPs): A Technical Note

Cited by in corpus (3)

• Predicting Solar Flares Using a Long Short-Term Memory Network
• The Coronal Global Evolutionary Model: Using HMI Vector Magnetogram and Doppler Data to Model the Buildup of Free Magnetic Energy in the Solar Corona
• Machine learning reveals systematic accumulation of electric current in lead-up to solar flares