SOLAR WATCH: Sunspot 2017 Erupts With Strong X1.0 Solar Flare – Produces Massive Coronal Mass Ejection; Plasma Directed To The North And Away From Earth!

March 29, 2014 – SUN – Sunspot AR2017 has just unleashed an X1-class solar flare. NASA’s Solar Dynamics Observatory captured the extreme ultraviolet flash on March 29:

Imagery by SDO.

Sunspot 2017 located in the northwest quadrant produced the impulsive X1.0 solar flare peaking at 17:48 UTC.

The flare was responsible for a brief radio blackout which effected the HF radio spectrum on the sunlit side of Earth during the middle of the CQ Worldwide WPX radio contest. Signals did recover quickly. 

X1.0 solar flare peaking at 17:48 UTC.
Region 2017 just produced an impulsive X1.0 solar flare at 17:48 UTC.
Image by EVE.

A CME associated with the X1 event is now visible in the latest STEREO Behind COR2 imagery. When watching this video courtesy of SDO, it would appear that most of the plasma was directed to the north and away from Earth. 

Attached is an updated coronagraph image courtesy of STEREO Behind showing a coronal mass ejection
(CME) leaving the sun following the X1 flare event earlier around region 2017.

ALERT: Type II Radio Emission
Begin Time: 2014 Mar 29 1753 UTC
Estimated Velocity: 4508 km/s
Comment: Associated with X1/2b event from Region 2017. Also associated with Castelli U radio Burst with 110,000 sfu burst on 245 MHz. Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

SUMMARY: 10cm Radio Burst
Begin Time: 2014 Mar 29 1745 UTC
Maximum Time: 2014 Mar 29 1746 UTC
End Time: 2014 Mar 29 1748 UTC
Duration: 3 minutes
Peak Flux: 360 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

Below is an earlier look at the visible solar disk on Saturday morning. Solar activity was moderate prior to the X-Class solar flare, during the past 24 hours with a pair of M2 solar flares detected around region 2017. Each event produced a coronal mass ejection (CME) with what appears to be non Earth directed trajectories.

The active region has been fairly stable ever since. A filament eruption was observed near region 2014 this morning beginning at 06:20 UTC. A coronal mass ejection (CME) became visible in STEREO Ahead COR2 imagery and appears to be headed to the west.

WATCH:  Twin M2 Class Solar Flares – March 28, 2014.


All other visible Earth facing regions remain fairly stable with only minor C-Class activity detected. New region 2023 was numbered overnight after forming in between regions 2010 and 2014 near the west limb. There will remain a chance for an isolated M-Class event.

SOURCES: Space Weather | Solar Ham | Solar Watcher.

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