Observed a north to slightly northeast facing sloped measured at 40-43 degrees at 8300' in Summit Park to have what appeared to be a ski or snowboard triggered avalanche that occurred likely this morning or late yesterday. I did not observe the skier involved, but in looking at the track leading onto the slope it appears that that they skied cross slope at the convex point of a very wind loaded ridge and triggered a ~80 foot wide by 10 inch deep wind slab. A quick compression test (CT11) demonstrated a reactive weak layer along the ridge line and lots of cornices and wind drifts. About 200 feet lower on the slope, and out of the wind an ECT showed very different results, there on a 40 degree slope we obtained an ECTN.