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Coronal Holes

Coronal Holes in the News

Sun with coronal holes Coronal holes are large regions in the corona that are less dense and cooler than surrounding areas. The open structure of their magnetic field allows a constant flow of high-density plasma to stream out of the holes. There is an increase in the intensity of the solar wind effects on Earth when a coronal hole faces us.

The x-ray image above shows the Sun as viewed by the Yohkoh satellite. A large coronal hole, extending from the northern into the southern solar hemisphere is near the Sun's center. The brightest region shows hot loops that remain after a solar flare.

Back to Solar Activity

newspaper imageCoronal Holes in the News:

June 14, 2011: New insights on how solar minimums affect Earth -- NASA
January 11, 2011: Holes in the sun's corona -- NASA
August 28, 2010: Hole in the sun -- APOD
October 4, 2009: Streams of the Sun -- Astrobiology Magazine
September 23, 2009: The Sun could be heading into period of extended calm -- Physics World
December 15, 2008: SABER reveals the upper atmosphere's "breathing" pattern, in rhythm with the Sun -- NASA
September 27, 2007: Hole in the Sun -- APOD
February 19, 2007: Surprises from the Sun's south pole -- European Space Agency
February 7, 2007: South pole flyby -- Science@NASA
April 4, 2006: Coronal holes, jets, and the origin of 3He-rich solar energetic particle events -- ACE News
April 22, 2005: Solar wind originates in coronal funnels -- Max Planck Society
March 18, 2003: Coronal holes on the Sun -- NASA GSFC APOD
January 30, 2003: Environmental satellite readied to detect solar storms -- NASA GSFC
October 31, 2002: Spooky auroras light up autumn nights --
February 7, 2002: Coronal hole -- NASA GSFC APOD
October 16, 2001: Solar wind discoveries at solar maximum -- Spaceflight Now
March 3, 2000: The Sun's show hots up -- BBC News
March 2, 2000: Polar substorm -- NASA MSFC
February 24, 2000: Leaky Sun threatens disruption -- BBC


TRACE sun mosaic Supernova 1006 (ASCA) 30
Doradus ACE
spacecraft TRACE solar flare IMAGE magnetosphere
Click on images above to learn more about them

A service of the Heliophysics Science Division at NASA's GSFC

Questions and comments to:
Curator: Dr Eric R. Christian, NASA
Responsible NASA Official: Dr Eric R. Christian

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This file was last modified: July 27, 2011