Monster sunspot 1476 sent a parting blast our way, as the sun’s rotation was carrying it from view. The beautiful movie below shows a coronal mass ejection, or CME, hurtling into space from the sun on May 17, 2012. Its effects might deliver a glancing blow to Earth tomorrow (May 19).
NOAA forecasters at first said Earth was not in the path of the CME’s effects, but later said a shock wave from the blast could sweep closer to Earth’s magnetic field on May 19. The NOAA Today’s Space Weather page says:
Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to unsettled levels with isolated active periods on day 1 (19 May) due to a possible shock arrival from the 17 May CME. Quiet to unsettled conditions are expected on day 2 (20 May). Mostly quiet conditions are expected on day 3 (21 May).
No major effects are expected, but the incoming CME could affect telecommunications and satellites in orbit. Plus it could create auroras, or northern lights! Be on the lookout if you live at a high latitude.
This same sunspot region sent another CME toward Earth and gave us a glancing blow around May 14, 2012.
Plus photographers around the world got some amazing images of the sunspot region, which was many times larger than Earth. You can read more about the sunspot region’s activity in recent days – and see some great photos – at this post.
It was an M5-class solar flare that created the May 17 CME, by the way.
Bottom line: Sunspot 1476 is about to disappear around the limb of the sun as the sun’s rotation carries it from view. But an M5-class flare on May 17, 2012 sent out one last CME, which might deliver a glancing blow to Earth on May 19.
Deborah Byrd created the EarthSky radio series in 1991 and EarthSky.org in 1994. Today, she serves as Editor-in-Chief of this website. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named 3505 Byrd in her honor. A science communicator and educator since 1976, Byrd believes in science as a force for good in the world and a vital tool for the 21st century. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says.