The activity of Parícutin during its third year

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Abstract
On its second anniversary, February 20, 1945, the cone of Parícutin was approximately 1500 feet high, and lava flows, erupted mainly from vents at its southwest base, covered approximately 4‐½ square miles.During February and March, 1945, eruption of lava diminished while the explosive activity of the summit‐crater Increased in intensity. The Ahuan vent, at the southwest base of the main cone, continued to discharge lava throughout this period. A long stream moved slowly around the south and east base of the cone and continued northward beyond the parasitic cone of Zapicho for almost two miles, spreading across much of the great San Juan flow of 1944 and the older flow from Zapicho. In many places, the new lava was injected sill‐like under these older flows, raising and arching them locally as much as 60 feet. Another long flow issued from a vent that opened on February 4 about one quarter mile west‐northwest of the Ahuan vent. By the second week of March, this flow had spread northward past Canijuata as a narrow stream two miles long and had buried most of the village of Parícutin not previously inundated by lava (see Fig. 1).

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