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November 6, 2024 | 06:32 am
TEMPO.CO, Bandung - Indonesia's Geological Agency has raised the activity status of Mount Iya in East Nusa Tenggara (NTT), from 'Waspada' or Alert (level II) to 'Siaga' or Standby (level III) since Tuesday evening, November 5, 2024. Mount Iya is located in Ende in the southern part of Flores Island, the same island as Mount Lewotobi Laki-laki which explosively erupted last Monday and killed 10 people.
Head of the Geological Agency, Muhammad Wafid, shared information about the increased status of Mount Iya. The community and visitors or tourists are advised not to approach the area and not to do any activities, either on land or at sea, within a 3-kilometer radius from the active crater of Mount Iya.
"Also, avoid approaching the gas seepage holes around the crater to avoid the potential danger of toxic gases," said Wafid.
Wafid explained that the eruption character of Mount Iya is generally concentrated in the main crater in the form of magmatic eruptions. The eruption produces volcanic ash, ejected incandescent rocks, and lava flows accompanied by collapses at the summit. However, for now, Wafid added that there are cracks that have the potential to cause landslides.
He mentioned that the cracks are developing around the active crater of Mount Iya, indicating weak zones inside the volcano. "These cracks are likely to cause large landslides towards the sea if there is a upcoming eruption of Mount Iya," he said.
The Geological Agency noted that during the visual observations from October 1 to November 4, 2024, the monitoring of white and gray smoke originated from the main crater of Mount Iya with thin and high intensity ranging from 10-300 meters from the mountain peak. Visual observation using drones on November 5, 2024, observed thin gray crater smoke with a height of about 50 meters from the peak of Mount Iya.
Meanwhile, seismic activity observations during the period from October 1 to November 4 were dominated by harmonic tremors, non-harmonic tremors, continuous tremors, and deep volcanic tremors. A significant increase in seismic activity in the form of deep volcanic tremors has been monitored since last August.
This significant increase in seismic activity indicates an increase in pressure inside Mount Iya due to the increased magmatic activity, or the migration of magma from deep depths to shallow depths. "This triggers the appearance of shallow earthquakes that can cause eruptions," said Wafid.
The Geological Agency recorded tremors starting from October 16, marking the movement or increase in magma pressure towards the surface. "One should be wary if significant tectonic earthquakes are recorded around Mount Iya because they have the potential to affect the volcanic activity of Mount Iya," said Wafid.
Mount Iya has a height of 637 meters above sea level. Mount Iya is a stratovolcano with eruption history recorded since 1671, and the last eruption occurred in 1969. The interval between eruptions is estimated between 1 year and 60 years. The Geological Agency has placed the observatory post for Mount Iya in Tewejangga, Paupanda Village, Ende Regency, East Nusa Tenggara.
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