On July 2, 2019, a full solar eclipse has occurred in the location of the Andes Lidar Observatory in Chile. We have recorded data utilizing the set of sensors operating at the facility, such as daytime/nighttime lidar measurements of mesosphere temperature, Na density, and winds, nightglow images of the OH(6,2), O2(0,1), O(1S), and O(1D) emissions, GPS receivers, and the new meteor radar deployed at ALO on June 2019. The data show clear effects of the solar eclipse in the mesosphere region such as deep changes in temperature and density, as well as generation of unusual gravity wave structures. In this presentation, we want to discuss the image data showing the gravity wave activity during the evening following the eclipse event and discuss the generation mechanisms of the unusual gravity wave structures in the light of data recorded by all other instruments.