Global Volcanism Program | Image GVP-03764
A geologist observes a thick ash plume rising above the crater of Parícutin on March 22, 1944, from Mesa de Cocjarao, 1 km SW. The lowered south rim is due to scouring of the south crater vent by the eruption column. During March 1944 the eruptive activity ranged from a weak explosive column accompanied by deep rumbling to large, but almost soundless cauliflower columns such as the one shown here.
Photo by William Foshag, 1944 (Smithsonian Institution, published in Foshag and Gonzáles-Reyna, 1956).