The current eruptive period at Colima has been ongoing since 1997 with the main type of explosion which occurs here Vulcanian in origin. Vulcanian eruptions are generally described as short lived bursts which produce an ash/steam column which can range in height between hundreds of metres or generally to ~10 km. Effusive activity also occurs at Colima with lava flows occuring commonly throughout its history. Generally the eruptions are small in scale however larger eruptions (up to VEI 4) have occurred in the past which have destroyed the summit area
Colima is currently monitored by the Colima Volcano Observatory. For a panorma of the observatory visit this link. The website of the Observatory is available here, where you can find webcams, photos and more detailed information of the volcano. Due to it's location and easy access Colima has become one of the most studied volcanoes and this is in part due to the excellent management and work done at and by the University of Colima.