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A haunting grin appeared on the sun as bright active regions and dark coronal holes combined to create a jack-o’-lantern face just in time for Halloween. The image was captured by NASA’s Solar Dynamics Observatory on Oct. 28 at the 193-angstrom wavelength. (Image credit: NASA\/SDO)<\/p>\n
The sun is getting into the Halloween spirit once again. NASA’s Solar Dynamics Observatory (SDO) captured a hauntingly festive view of our star on Oct. 28, looking like a cosmic jack-o’-lantern grinning down at Earth.<\/p>\n
In the image, captured by SDO’s Atmospheric Imaging Assembly (AIA), dark coronal holes and bright active regions combine to form what appears to be glowing eyes, a nose and a mischievous smile carved across the solar surface.<\/p>\n
<\/p>\n That “mouth” however, is more than just a decoration. It’s actually a vast coronal hole, an area on the sun<\/a>‘s surface where the magnetic field opens up, allowing charged particles (solar wind<\/a>) to stream freely into space. This particular hole is currently spewing a high-speed solar wind stream toward Earth<\/a>, which could spark minor (G1) to moderate (G2) geomagnetic storm conditions<\/a> from Oct. 28 through Oct. 29, according to space weather forecasters.<\/p>\n You may like<\/p>\n If geomagnetic storm conditions intensify, auroras<\/a> can spread beyond their usual polar locations, into mid-latitudes. 22 years ago this week, the infamous Halloween storms of 2003<\/a> saw a barrage of powerful solar eruptions trigger spectacular auroras and disrupt satellites and power systems worldwide.<\/p>\n SDO<\/a> has been watching the sun since 2010, providing continuous, high-resolution views that help scientists understand how the sun’s magnetic energy drives space weather<\/a>, which in turn affects our lives here on Earth.<\/p>\n This isn’t the first time the observatory has spotted a spooky face on the sun. Back in 2014, it captured this eerie jack-o’-lantern-like grin.<\/p>\n \n