The pilot of the glider reported that, while returning to the airport, the glider descended faster than expected, so he diverted to an alfalfa field for landing. The glider encountered a gust of wind and the left wing "suddenly" hit the ground. The glider then ground looped to the left.

The glider sustained substantial damage to the fuselage, empennage and right aileron.

The pilot reported that there were no preaccident mechanical failures or malfunctions with the glider that would have precluded normal operation.

The pilot reported that the wind was from 140° at 10 to 20 knots and gusting. The pilot landed the glider to the south.