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volcancito that gives explosions with regular noises and throws up curds 
37 
The term "volcancito” is used to designate a small subsidiary cone, 
formed by small flows and spatter material from a small vent. This differs 
from a hornito, which is an excrescence of vesicular slag from a crack. 
of lava to a height of 200 meters, and to a distance of 300 meters from the 
vent. They fall in the form of a soft cake. Ing. Molina and Antonio 
Gutierrez, having just retired a short distance from the vent, escaped an 
explosion of large stones. The eruption of the main cone affects this lava 
vent, which also emits gases and yellowish vapors when it ejects an increased 
number of rocks. These rocks are thrown to some distance and almost reach a 
size of 500 kilograms. as the vent reopened, the S.1U flank of the cone 
again slid out, pushing and spreading about 80 meters farther than the slice 
that slid out in November of 1944. 
19 - The south side of the cone is the thinner part end is weaker, first be- 
2 / 
cause of the three slides that have taken place on this flank and second 
17 
In April 1943, November 1944, and the present one. They are due to out- 
breaks of lava carrying a segment of the cone with it. 
because the fissure of Pebruary 20, 1943, was from NS to ST, conforming to 
the vents of Zapicho, the crater, the hornitos and the Ahuan vent. The lava 
stream at its origin surges ahead at a rate of 40 meters per minute, according 
to calculations of Ing. Molina, flowing as a wide river, following all the 
east base of the cone. 
