Activity of Paricutin Volcano from July 1 to December 31, 1949

The activity of Parícutin Volcano, State of Michoacan, Mexico, during the second half of 1949 is represented diagrammatically in Figures 1, 2, and 3. An explanatory discussion of these diagrams of eruptive characteristics and a description of the lettered noise types shown on them appeared in an earlier report on this Volcano [Wilcox, 1947], to which the reader is referred. Photographs of two common types of eruptive activity are shown as Figures 4 and 5, and a map outlining the monthly advance of lava during the period covered is given as Figure 6. Altitudes of different points on Paricutin cone are listed in Table 1, and weather data are summarized in Table 3.