Aurora Ahead? – Filament Eruption with an Earth-directed CME

There may be a geomagnetic storm in store for Earth. Lookout aurora watchers!

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A filament ~50 Earths in length (~400,000 miles) erupted from the Sun’s southern hemisphere in the southwest direction around 7:24 UT (4:24 am EDT).

The eruption produced a Coronal Mass Ejection or CME,  traveling ~915 km/s or ~2 million mph. Here is a look at the CME in the SOHO/LASCO C2 instrument with Earth for scale. The sun is shown with a composite image of SDO 304 and 193 angstrom wavelength cameras.

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The next two images show snapshots of the CME in composite images with SDO and SOHO/LASCO C2/C3. The first frame is at 8:48 UT and the second one is at ~13:30 UT both on 8/20/2013. The bright object on the right in C3 (blue image) is Mercury and Regulus on the left.

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NASA SWRC simulations indicate the CME leading edge will reach Earth on 8/22/2013 around 23:11 UT (7:11 pm EDT) +-7 hours. It could produce a minor geomagnetic storm along with aurora visible at higher latitudes.

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credit: NASA/ESA/SOHO/SDO and helioviewer

1 Comment

  1. Logan says:

    Can you find some information about an object in SOHO LASCO C3 on August 20 2013, 19:30 to the bottom left of the sun. Venus has light coming from the sides as expected and another object to the left of the sun but smaller and moving slow, but this object has the same light emitted but only for 2 frames and it is gone. If distance is relative to that of Venus and other object, wouldn’t that mean that this object is in our solar system?

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