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Seven Indonesian volcanoes in Level III alert status | BorneoPost Online | Borneo , Malaysia, Sarawak Daily News

January 5, 2012

Seven Indonesian volcanoes in Level III alert status

Posted on January 5, 2012, Thursday

JAKARTA: The Centre of Vulcanology and Geological Hazard Mitigation (PVMBG) on Thursday declared that seven out of 127 volcanoes in Indonesia are in danger status of level III (alert), according to China’s Xinhua news agency.

The volcanoes are namely Mount Papandayan in West Java province, Mount Lokon and Mount Karangetan of North Sulawesi province, Mount Kawah Ijen in East Java province, Mount Anak Krakatau in the border of Banten and Lampung provinces, Mount Gamalama at North Maluku province and Mount Lewotolo in East Nusa Tenggara province, respectively.

Out of the seven volcanoes, authorities are focusing on Mount Kawah Ijen, Mount Gamalama and Mount Lewotolo as their eruption impact is the biggest compared to others, said Head of the National Agency of Disaster Mitigation BNPB) Syamsul Muarif.

He said that the BNPB and regional agencies of disaster mitigation are enhancing preparation and planning to anticipate the impact of the volcanoes activities.

Explaining further, he said that Mount Kawah Ijen contains huge danger if it erupts as it threatens as many as 9,000 people living surround the volcano.

“The biggest threat of Mount Kawah Ijen is not hot cloud, flamed material launch or volcanic ash, but is within its volcanic lake containing 30 million metre cubic of water with deadly acid level,” he said, expressing disappointment that people refuse to evacuate despite several warnings.

While, increasing activities of the Mount Gamalama will expose and force, 638 people to take refuge. Last year, there people were killed by cold lava flood of the volcano following heavy rain on the top of the volcano.Mount Lewotolo, with eruption type of explosive holds primary danger of volcanic bombs and hot cloud. However, Syamsul said that data shows that there has been no strong eruption that claims lives since 1660.

Although Mount Lokon in the city of Tomohon of North Sulawesi has erupted on Dec 27, last year, he said such incident still does not force people to take refuge.

“Mount Anak Krakatau that erupts almost every day with small intensity does not pose any danger to people as it locates in a strait connecting the islands of Java and Sumatra.

The volcano, he said is in a growth phase and there is a small possibility that it erupts like what happened in 1883, triggering strong tsunami and claimed thousands of lives. – Bernama

 

G. Improvement Status Ile Lewotolo of Alert (Level II) to alert (Level III)

Tuesday, 03 January 2012 07:40 administrator
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I. Introduction
Volcano is located on the Ile Lewotolo Lembata District, East Nusa Tenggara province, geographically located at position 08 ° 16’15 “latitude and 123 ° 30’18” E with an altitude of 1455 meters above sea level (asl). This volcano had rested 92 years.

The last eruption occurred in 1920 a small eruption. Previous eruptions have been recorded be some times that in 1660, 1819, 1849, 1852, 1821, 1864, 1889, and 1920.

Seismic monitoring carried out by installing a seismic station consisting of a vertical component seismometer L4-C, and VCO are operated by radio telemetry system and recorded using a recorder PS-2 in Pos PGA Lewotolo ILI. Seismometer is located approximately 1 km southwest of the crater at coordinates 08 ° 16 ‘57.00 “latitude, 123 ° 29 ‘39.09 “longitude, and altitude 716 m asl.

Based on the results of visual and seismic data analysis, the starting date of January 2, 2012, at 18:00 pm, the status of activities of G. Ile Lewotolo raised fromNormal Level I ) to alert Level II ). Delivered following visual observations and seismicity, as follows:

II. Visual

Visually monitoring the activity of G. Ile Lewotolo performed continuously from the Post Laranwutun PGA Village, during the month of December 2011 the crater was observed blowing white smoke thick with a height between 50-250 feet above the summit along with dim firelight began January 2, 2012 at 20:00 AM.

III. seismicity

Monitoring the activity of G. Ile Lewotolo performed continuously from the Post Laranwutun PGA Village, District ILI Ape by using seismographs Kinemetriks PS-2, are as follows;

  • Dated December 31, 2011; Recorded earthquake Blowing continuously with a maximum amplitude 5-25 mm. 
  • Dated January 1, 2012: Blowing earthquake recorded continuously with a maximum amplitude between 50-30 mm.
  • Dated January 2, 2012: Blowing earthquake recorded continuously more intensive form of tremor gusts began at 14:00 pm, with a maximum amplitude between 5-35 mm. At 18.00 AM to 23:00 PM, an earthquake tremor was recorded with a gust of 10-40 mm in maximum amplitude.

IV. Potential Hazards
The potential danger eruptions G. Ile Lewotolo include:

a. Avalanches is the peak area of weathered / changes that are part of the intrusion is estimated to have a volume of about 400,000 m 3 , leading to the Southeast.

b. Pyroclastic avalanches that lead to the Southeast and East from the point of eruption.

c. Incandescent material hurl heavy ash fall within a radius of 2 km and can be changed according to the intensity of the eruption.

d. Gases that are harmful to life, among others, CO 2 , CO, and SO 2 .

V. Conclusion
Based on the results of visual and seismic data analysis, the starting date of January 2, 2012, 23.30 pm, the status of activities of G. Ile Lewotolo upgraded from alert (Level II) into Standby ( Level III ).

In connection with the increase in status, the Center for Volcanology and Geological Hazard Mitigation will increase intensive monitoring activities in order to evaluate G. Ile Lewotolo and coordinated with the Local Government (Satlak Satkorlak PB and PB) local.

G. Status of activities Ile Lewotolo will be lowered / increased again if there is a decrease / increase in volcanic activity.

VII. Recommendation

G. In connection with the status of activities Ile Lewotolo ” ALERT (LEVEL III) “is recommended:

  1. Communities around G. Ile Lewotolo and visitors / tourists are not allowed to pass up any activity in G. Ile Lewotolo in disaster Prone Region III (KRB III) within a radius of 2 km. Area located in the southeast of the central activity of G. Ile Lewotolo among other Lamariang Village, Lewohala, Pukabumi, and Ile Ape Jontona in Eastern District in order to further enhance preparedness if at any time of the eruption (eruption) can be evacuated to a safe place, ie to the north, west, and south towards the City Lewoleba, Hamlet Kalabahi, and Village Baopana.
  1. Communities around G. Ile Lewotolo expected quiet, no issues about the eruption tepancing G. Ile Lewotolo.
  1. Center for Volcanology and Geological Hazard Mitigation always coordinate with the Government of East Nusa Tenggara (as Chairman of SATKORLAK PB) and Lembata County Government (Chairman SATLAK PB) on the activity of G. Ile Lewotolo. Society please always follow the direction of SATLAK SATKORLAK PB and PB.
  1. Local Government continuously coordinating with G. Observation Post Ile Lewotolo Laranwutun Village, District Ile Ape, Lembata district or with the Center for Volcanology and Geological Hazard Mitigation in Bandung.                                        http://www.vsi.esdm.go.id/
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