October 28, 2018
On this day in 2003 (October 28), the Sun unleashed one of the largest and most geoeffective solar storms of the modern age (and consequently, one of the most studied).
June 12, 2014
NOAA active region AR12087 began making its activity apparent in SDO well before it became visible on the Earth facing solar disk. Solar flares from the region became visible in the first week of June. On June 10, the region […]
June 6, 2014
The slow CME produced by the giant filament eruption from June 4 could give Earth a glancing blow. The impact should be very weak but there could be a minor geomagnetic enhancement on June 7. High latitude aurora watchers may […]
September 30, 2013
A huge filament erupted from the sun producing a beautiful coronal mass ejection (CME) and solar energetic particle event. Around 21 UT, 9/29/2013 a filament erupted from the northwest quadrant of the sun. It started from the surface with a […]
August 22, 2013
This time a CME is headed directly for us! Around 5:24 UT (1:24 EDT), the SOHO/LASCO C2 instrument caught a first glimpse at a CME leaving the sun directly for Earth. The CME is traveling at a fairly slow ~610 […]
August 20, 2013
There may be a geomagnetic storm in store for Earth. Lookout aurora watchers! 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 […]
August 17, 2013
A long duration M3.3 flare with a beautiful eruption and CME! Active region AR11818 produced a flare peaking in X-ray at 18:24 UT (2:24 pm EDT). The eruption produced extended X-ray emission with another flare, ~M1.5 after the initial eruption […]
April 12, 2013
M6.5 solar flare, Earth-bound CME and a particle storm! AR11719 produced the largest flare of the year, an M6.5, peaking in GOES X-ray at 7:16 UT on April 11. First, we have a snapshot of the flare from the SDO/AIA […]
March 16, 2013
Look at for Aurora tonight and tomorrow at high latitudes! Yesterday’s coronal mass ejection (CME) is expected to sweep past Earth in the last half of today (March 16, 2013) sometime around 18UT (+- 7-8 hours). Forecasts are from minor […]
January 24, 2013
Two solar filaments lifted off the sun in beautiful eruptions on January 23, 2013. Both eruptions produced coronal mass ejections or CMEs observed with the SOHO LASCO C2 coronagraph at 3:12 UT and 14:12 UT respectively. The first […]
November 9, 2012
A CME is coming our way! A slow (only ~570 km/s Type-C), faint CME was detected by LASCO and STEREO around 15:24 UT 11/09/2012 and it is heading in the direction of Earth. Computer models indicate that the leading edge […]
April 22, 2012
On April 22, 2012, filament material uncurled as an erupting prominence around sunspot group AR11463. There was a C1.8 solar flare and the resulting eruption produced a SCORE-C CME detected by SOHO/LASCO C2 at 15:30 UT.
April 17, 2012
An eruption of plasma from just behind the solar limb observed by SDO with the 304 Angstrom camera.This shows material at temperatures around 60,000-80,000 Kelvin. This produced a CME that went out the left side (East) of the Sun starting around 2 UT. At ~1000 km/s the CME has a SCORE O (for ordinary). NASA produced a computer model predicting the CME will impact STEREO Behind on 4/17 at 7:40 UT (but not Earth).
March 14, 2012
Sungrazing comet seen for the first time with the SOHO/SWAN instrument. It is aptly named Comet SWAN. Ukrainian Amateur astronomer, citizen scientist, and SOHO Comet Hunter Vladimir Bezugly reported a bright blob on images taken by the SWAN instrument on […]
March 14, 2012
Sunspot group or active region AR11429 has almost rotated out of view but it still had enough energy to release an M7.9 X-ray solar flare, a fast coronal mass ejection (CME) and a solar energetic particle event (SEP). A […]
March 11, 2012
CMEs are on their way to us! Estimated impact is March 11, 2012 around 2-3 PM EDT. High latitude aurora watchers keep lookout the night of March 11, 2012. On March 10, 2012, the sun produced 1 C-class […]
March 7, 2012
Sunspot group, AR11429 (Active Region), is at it again. When it first began its journey across the Earthward side of the Sun it released an M-class flare, an X-class flare and several more M flares, along with several CMEs. Early […]
December 15, 2011
UPDATE: Lovejoy survived despite most predictions to the contrary! Check out the videos below. A sungrazing comet called Lovejoy is near what will surely be its end. Sungrazers melted by the Sun is not really new. In fact, SOHO has become […]
November 3, 2011
Solar Activity Solar activity was at low to moderate levels, with occurrences of several C-class flares and three M class flares (see the list below). Quite a few slow to moderate CMEs were detected emanating from different regions of the […]
September 6, 2011
At 01:50 UT, sunspot group, AR11283, produced an M5 solar flare and CME (coronal mass ejection) from near the center of the solar disk. The CME appears to be moving at an angle away from a path straight towards […]
December 21, 2010
SOHO’s LASCO C2 and C3 coronagraphs caught the action as three, separate coronal mass ejections (CMEs) blasted out in succession from the Sun (Dec. 12, 2010). These were each distinct and unconnected events. The first CME event (directly on the […]
December 2, 2010
The Solar and Heliospheric Observatory or SOHO is by many accounts the granddaddy of modern solar astronomy. SOHO is not the first space based solar observatory but it has truly ushered in a golden age for solar physics. The mission […]
October 18, 2010
A giant filament on the sun produced a small eruption and flare.
October 11, 2010
Around 3:30 UT on October 6, 2010 a filament erupted in the northeast part of the solar disk (upper left area). Moving at around 375 km/s (850,000 miles per hour) the CME combined with the ambient solar wind then over […]
October 7, 2010
A filament erupted in the NE area of the sun. The eruption was observed by SDO and the associated Halo CME was seen by SOHO's C2 and C3 coronagraphs. SDO is currently in eclipse season so during this event the earth moved between SDO and the sun, moving across the sun for a few minutes.