It is thought that the SDO and SOHO observations are connected, making this a global magnetic disturbance affecting the whole of the Earth-facing side of the sun.
The eruption happened at around 0855 UT (3:55 am EST), when the SDO detected a C3-class solar flare originating from a cluster of sunspots (called sunspot 1092). This isn't a large flare, but right at the same time, a filament located about 100,000 kilometers from the flare also erupted.
A "filament" is a long magnetic structure rising high above the surface of the sun filled with cool plasma. Because it is cooler than the sun's chromosphere, when in the direct line of sight between the Earth and sun, it appears as a dark ribbon snaking across the sun's disk. If a filament is spotted on the limb of the sun (i.e. on the side), it appears as a bright prominence arcing high into the sun's atmosphere.
Judging by the timing, the flare and the filament erupted at the same time, suggesting they are connected via long-range magnetic field lines. The resulting shockwave emanating away from the flare site may have had a role to play in accelerating the filament when it hit the filament's eruption zone.
Watch the video of the eruption as seen by the SDO: