NDLI: The Evolution of Sunspot Magnetic Fields Associated with a Solar Flare

Content Provider	Springer Nature Link
Author	Murray, Sophie A. Bloomfield, D. Shaun Gallagher, Peter T.
Copyright Year	2011
Abstract	Solar flares occur due to the sudden release of energy stored in active-region magnetic fields. To date, the precursors to flaring are still not fully understood, although there is evidence that flaring is related to changes in the topology or complexity of an active-region’s magnetic field. Here, the evolution of the magnetic field in active region NOAA 10953 was examined using Hinode/SOT-SP data over a period of 12 hours leading up to and after a GOES B1.0 flare. A number of magnetic-field properties and low-order aspects of magnetic-field topology were extracted from two flux regions that exhibited increased Ca ii H emission during the flare. Pre-flare increases in vertical field strength, vertical current density, and inclination angle of ≈ 8° toward the vertical were observed in flux elements surrounding the primary sunspot. The vertical field strength and current density subsequently decreased in the post-flare state, with the inclination becoming more horizontal by ≈ 7°. This behavior of the field vector may provide a physical basis for future flare-forecasting efforts.
Starting Page	45
Ending Page	57
Page Count	13
File Format	PDF
ISSN	00380938
Journal	Solar Physics
Volume Number	277
Issue Number	1
e-ISSN	1573093X
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-07-12
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Active regions, magnetic fields Flares, relation to magnetic field Magnetic fields, photosphere Sunspots, magnetic fields Extraterrestrial Physics, Space Sciences Meteorology/Climatology Astrophysics and Astroparticles
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Are Solar Active Regions with Major Flares More Fractal, Multifractal, or Turbulent Than Others?

Flaring Rates and the Evolution of Sunspot Group McIntosh Classifications

Estimating Flare-Related Photospheric Lorentz Force Vector Changes Within Active Regions

Performance of Major Flare Watches from the Max Millennium Program (2001 – 2010)

Statistical Feature Recognition for Multidimensional Solar Imagery

Large-Scale Magnetic Field of the Sun and Evolution of Sunspot Activity

A Statistical Study on Photospheric Magnetic Nonpotentiality of Active Regions and Its Relationship with Flares During Solar Cycles 22 – 23

Cross-Calibrating Sunspot Magnetic Field Strength Measurements from the McMath–Pierce Solar Telescope and the Dunn Solar Telescope

Two-Dimensional Spectroscopy of Photospheric Shear Flows in a Small δ Spot

The Evolution of Sunspot Magnetic Fields Associated with a Solar Flare

Similar Documents

Are Solar Active Regions with Major Flares More Fractal, Multifractal, or Turbulent Than Others?

Flaring Rates and the Evolution of Sunspot Group McIntosh Classifications

Estimating Flare-Related Photospheric Lorentz Force Vector Changes Within Active Regions

Performance of Major Flare Watches from the Max Millennium Program (2001 – 2010)

Statistical Feature Recognition for Multidimensional Solar Imagery

Large-Scale Magnetic Field of the Sun and Evolution of Sunspot Activity

A Statistical Study on Photospheric Magnetic Nonpotentiality of Active Regions and Its Relationship with Flares During Solar Cycles 22 – 23

Cross-Calibrating Sunspot Magnetic Field Strength Measurements from the McMath–Pierce Solar Telescope and the Dunn Solar Telescope

Two-Dimensional Spectroscopy of Photospheric Shear Flows in a Small δ Spot

The Evolution of Sunspot Magnetic Fields Associated with a Solar Flare