NASA Logo, National Aeronautics and Space Administration
header

NASA's SDO Sees Two Coronal Holes

NASA's SDO Sees Two Coronal Holes

03.17.15 – NASA's Solar Dynamics Observatory, or SDO, captured this solar image on March 16, 2015, which clearly shows two dark patches, known as coronal holes. The larger coronal hole of the two, near the southern pole, covers an estimated 6- to 8-percent of the total solar surface. While that may not sound significant, it is one of the largest polar holes scientists have observed in decades. The smaller coronal hole, towards the opposite pole, is long and narrow. It covers about 3.8 billion square miles on the sun - only about 0.16-percent of the solar surface.

Coronal holes are lower density and temperature regions of the sun's outer atmosphere, known as the corona. Coronal holes can be a source of fast solar wind of solar particles that envelop the Earth.

>> Read More

More LWS News

03.11.15Sun Emits Significant Solar Flare
03.10.15SDO Captures Images Of Mid-Level Solar Flares
02.11.15New Videos Highlight NASA SDO's Fifth Anniversary
02.10.15NASA's SDO Sees Giant Filament on the Sun
01.22.15SOHO and Hinode Offer New Insight Into Solar Eruptions
01.13.15First Notable Solar Flare of 2015
12.22.14Holiday Lights on the Sun: Imagery of Significant Flare
12.19.14Two Mid-Level Flares in 2 Days
12.17.14SDO Records Mid-level Flare on Dec. 16, 2014
12.04.14Sun Emits a Mid-Level Flare on Dec. 4, 2014

>> Go to Newsroom



The LWS Program provides missions to improve our understanding of how and why the Sun varies, how the Earth and Solar System respond, and how the variability and response affects humanity in Space and on Earth.

LWS Mission Status

NET = No Earlier Than

Related Sites

Documentation

LWS Directives Requirements List
+ Download | PDF | 3 Pages | 20KB

Connect with LWS
Missions


SDO — Operating
Check out SDO on Facebook Follow SDO on Twitter Check out SDO on YouTube Check out SDO on Flickr Check out SDO's Blog
Van Allen Probes — Operating
Check out Van Allen Probes on Facebook Follow Van Allen Probes on Twitter Check out Van Allen Probes on YouTube    
NASA logo
Goddard Space Flight Center