Mount Semeru, which rises 3,676 meters above sea level on the border of Lumajang and Malang regencies, East Java, has once again shown an increase in volcanic activity. Throughout Friday (3/7), the highest mountain on Java Island was recorded to have erupted seven times within a span of four hours.
According to an official report from the Mount Semeru Observation Post officer, Liswanto, the first eruption occurred at 06:06 WIB (Western Indonesian Time) with the ash column height reaching 700 meters above the peak. At that time, thick gray ash material was observed moving towards the southeast, with a maximum seismograph amplitude of 22 millimeters and a duration of 108 seconds.
The intensity of the eruptions continued to fluctuate throughout the morning. At 07:22 WIB, a second eruption occurred with a column height of 400 meters, which was followed by a stronger eruption at 07:29 WIB with the ash column reaching 1,100 meters.
Overall, the height of the eruptions during the four-hour period varied, ranging from 400 meters to a peak of 1,300 meters above the crater. To date, authorities continue to closely monitor the movement of Semeru's volcanic activity to anticipate the impact on residents living around the disaster-prone areas.
