JAKARTA - Mount Semeru, which is on the border of Lumajang and Malang Regencies, East Java, has erupted three times with an eruption of up to 1 kilometer on Tuesday morning.
The first eruption occurred at 05.45 WIB with the height of the observed eruption column about 600 meters above the peak with the observed ash column gray in color with a thick intensity towards the southwest. The eruption was recorded on the seismograph with a maximum amplitude of 22 mm and a duration of 138 seconds.
"The second eruption occurred at 07.06 WIB with the height of the observed eruption column about 1 kilometer above the peak or 4,676 meters above sea level (msl)," said Mount Semeru Observation Post Officer Mukdas Sofian as reported by ANTARA, Tuesday, May 19.
According to him, the observed ash column was white to gray with a thick intensity towards the southeast and south. The eruption was recorded on the seismograph with a maximum amplitude of 22 mm and a duration of 140 seconds.
The highest mountain on Java Island erupted again at 07.54 WIB and the height of the eruption column was observed about 1 kilometer above the peak (4,676 m asl).
"The observed ash column is white to gray with a thick intensity towards the southeast and south. The eruption was recorded on the seismograph with a maximum amplitude of 22 mm and a duration of 145 seconds," he said.
He explained that currently the volcanic activity of Mount Semeru is at Level III Status (Alert) with the recommendation that the public not carry out any activities in the southeast sector along Besuk Kobokan, as far as 13 kilometers from the peak (eruption center).
Outside this distance, the public does not carry out activities at a distance of 500 meters from the river bank (river border) along Besuk Kobokan because they have the potential to be hit by the expansion of the hot cloud and lava flow up to a distance of 17 kilometers from the peak.
"The public is prohibited from carrying out activities within a radius of 5 kilometers from the crater/peak of Mount Semeru because they are prone to the danger of stone throwing (pijar)," he said.
The public is reminded to be aware of the potential for hot clouds, lava discharge, and lahar along the river/valley streams upstream of the summit of Mount Semeru.
"Especially along Besuk Kobokan, Besuk Bang, Besuk Kembar, and Besuk Sat and the potential for lava on small rivers which are tributaries of Besuk Kobokan," he said.
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