Thursday, August 23, 2018

Coronal Mass Ejection May Hit Earth This Weekend


A slow-moving coronal mass ejection (CME) that recently erupted on the sun may reach Earth on August 24-25. Data from NASA and ESA sun-observing spacecraft indicate that this CME could leave the sun on August 21.

CMEs are huge explosions of magnetic field and plasma from the sun's corona. When CMEs impact the Earth’s magnetosphere, they are responsible for geomagnetic storms and enhanced aurora. 

CMEs travel outward from the Sun at speeds ranging from slower than 250 kilometers per second (km/s) to as fast as near 3,000 km/s. The fastest CMEs erupt from large sunspot active regions, powered by the strongest magnetic field concentrations on the sun. These fast CMEs can reach Earth in as little as 14 to 17 hours. 

If the CME predicted to arrive at Earth this weekend does indeed hit our planet, it could spark auroras around the Arctic Circle. 

National Oceanic and Atmospheric Administration (NOAA) reveals that besides the recent CME, solar activity is expected to stay generally at very low levels at least until September 15. However, active levels may occur on September 3-4, September 7 as well as September 11-15. 

NOAA added that solar wind speed reached a peak of 569 km/s on August 21 and that there is currently one numbered sunspot region on the sun’s disk, designated AR2719.

2 comments:

  1. On the off chance that you can simply educate us somewhat more about the click edubirdie review that individuals are raving about at the present moment, it would be amazing for me. Please, help me out with this.

    ReplyDelete