MINISTRY OF ENERGY AND MINERAL RESOURCES
REPUBLIC OF INDONESIA
PRESS CONFERENCE
NUMBER: 60.Pers04/SJI/2022
Date: February 4, 2022
Mount Anak Krakatau Erupts, Danger Radius 2 Km from Active Crater
The Geological Agency of the Ministry of Energy and Mineral Resources (ESDM) appealed to the public not to approach Mount Anak Krakatu within a radius of 2 kilometers (km) from the active crater, due to an eruption today, Friday (4/2). Head of the Geological Agency, Eko Budi Lelono, said that 9 eruptions of Mount Anak Krakatau had been observed with the height of the ash column ranging from 800-1000 meters above the peak and the color of the column was thick gray-black.
"In connection with the activity level of Mount Anak Krakatau being at Level II (Alert), we recommend that people are not allowed to approach Mount Krakatau within a 2 km radius of the Active Crater," said Eko at the Bandung Geological Agency Office, Friday (4/2).
In this eruption phase, a transition from gusts of white smoke to gusts and eruptions of gray to black ash was observed. Visual monitoring indicated that the eruption was magmatic type, in line with recorded volcanic earthquakes.
"Visally, the height of smoke gusts during the period January 16 - February 4 2022 from the direction of the Pasauran and Kalianda PGA Posts and from CCTV generally cannot be observed because the mountain is generally covered in fog. When the weather is clear, the crater smoke gusts during the evaluation period are thin white to thick. continuously with an altitude of 25 - 1000 meters from the top of Mount Anak Krakatau, dominantly inclined to be blown by the wind to the north, northeast, east and south. On February 3, 2022, an increase in the intensity of smoke gusts to ash was observed and at night the rays of fire were observed in the sky. above the crater," said Eko.
Meanwhile, the seismicity of Mount Anak Krakatau during January 16 - February 4 2022 was marked by the recording of 9 Eruption earthquakes, 135 Blowing earthquakes, 4 Harmonic Tremors, 499 Low Frequency earthquakes, 2 Hybrid/Many Phase earthquakes, 32 Volcanic earthquakes. shallow, 4 deep volcanic earthquakes, 2 local tectonic earthquakes, 8 distant tectonic earthquakes and 19 continuous tremors with an amplitude of 0.5-26 mm (dominantly 5 mm).
In the February 2022 eruption period, an increase in magmatic intrusion is likely to occur since December 20, 2021, which is indicated by the significant number of Deep Volcanic and Shallow Volcanic earthquakes recorded. In January 2022, high volcanic earthquakes were still observed and more and more shallow earthquakes were recorded. At the end of January 2021, it was indicated that magma was at a very shallow depth and ash emissions had been observed since February 3, 2022 at around 10:00 WIB. On February 4, 2022, 9 earthquakes were recorded, namely at 09:43, 10:25, 10:28, 12:46, 13:00, 13:31, 13:41, 14:46 and 17:07 WIB.
Furthermore, Eko also explained that the energy of volcanic activity as reflected in the RSAM (real-time seismic amplitude measurement) value shows a fluctuation pattern with a relatively increasing trend in the period January - February 2022. This increase is associated with an increase in gusts, low frequencies, and tremors. which relatively increases in energy both in number and magnitude of the earthquake amplitude caused by the release of energy that occurs when the fluid flows to the surface.
"Monitoring of tiltmeter deformation indicates a pattern of leverage during this period caused by changes in surface pressure associated with magma fluid movement to the surface. Visual and instrumental monitoring data indicate that Mount Anak Krakatau still has the potential to erupt," added Eko.
Recommendations for Disaster-Prone Areas
The map of disaster-prone areas shows almost the entire body of Mount Anak Krakatau with a diameter of +- 2 Km and the area around it is a disaster-prone area.
"Based on visual and instrumental data, the potential dangers from the current activity of Mount Anak Krakatau are the ejection of lava material, lava flows and heavy ash rain around the crater within a radius of 2 km from the active crater. Meanwhile, thinner ash rain can be exposed in more distant areas depending on the direction and speed of the wind," said Eko.
Historically, the potential for landslide hazard of Mount Anak Krakatau has been a permanent hazard that needs to be monitored and anticipated primarily by the competent authorities in early warning of volcanic follow-up hazards such as tsunamis.
"Volcanic avalanches cannot predict the time of occurrence and volume, and do not depend on the condition of the volcano being erupted or not. Volcanic avalanches can occur with or without an increase in volcanic activity," concluded Eko.
The public must comply with the recommendations issued by the Geological Agency through the Center for Volcanology and Geological Hazard Mitigation, and not be provoked by untrue and irresponsible news regarding the activities of Mount Anak Krakatau, and follow directions from the authorized agency, namely the Geological Agency, which will continue to carry out coordination with BNPB and K/L, Local Government, and other relevant agencies. Information on volcanic activity in Indonesia, earthquakes, and the latest ground movements can be obtained through the Magma Indonesia application/website (www.vsi.esdm.go.id or magma.esdm.go.id), and PVMBG social media (Facebook, Twitter). , and Instagram pvmbg_). (DKD)
Bureau of Communication, Public Information Services, and Cooperation
Source: https://www.esdm.go.id/id/media-center/arsip-berita/
0 Comments