The closest seismic station to the volcano was on Sitka, 24 km E; both the and remained at Unassigned due to the lack of dedicated, local instrumentation.
During a field visit on 22 April scientists observed no changes to the crack near Puracé and Curiquinga volcanoes, and no visible gas emissions.
The sulfur dioxide emissions were slightly high at 1,300 tons per day on 19 April but then dropped to 500 tons per day on 22 April.
One traveled 2 km SW down the Bebeng.
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The data showed that a broad area of uplift, about 17 km in diameter, was located about 2.