PVMBG: Timbang Crater, Sileri Crater in Dieng Remains on Caution Alert Level

    TEMPO.CO, Purwokerto The Center for Volcanology and Geological Hazard Mitigation (PVMBG) stated that Timbang Crater and Sileri Crater in the Dieng Plateau (Plato), Banjarnegara Regency, Central Java, remain on Caution alert status until today.

    “No evaluation of the status of the two craters has been made until now,” said the agency’s Dieng Volcano Observation Post (PGA) officer Aziz Yuliawan on Monday, January 30, 2023.

    Aziz explained that in the last few days, the concentration of toxic gas released by Timbang Crater has tended to decrease compared to when the alert status was elevated on Friday, January 13, 2023, at 23:00 western Indonesian time (WIB).

    However, the seismic activity continues to fluctuate because in Saturday, January 28, 37 local tectonic earthquakes were recorded with an amplitude between 6.7 to 42.7 millimeters, a delay time (S-P) of 0.4 to 2.2 seconds, and a duration of 6 to 17.8 seconds. On Sunday, January 29,  there were also 23 local tectonic quakes with an amplitude between 10.7 to 42.7 millimeters, an S-P of 0.5 to 1.48 seconds, and a duration of 4.6 to 27.3 seconds.

    Following the series of tectonic quakes, Aziz claimed that there has been no increase in the activity of the Dieng Plateau, especially Timbang Crater and Sileri Crater.

    Therefore, Timbang Crater and Sileri Crater were still on Caution alert status. Aziz called on the public to pay attention to the recommendations issued by PVMBG, such as not approaching the Sileri Crater within a distance of one kilometer from the crater rim.

    People are also recommended not to approach the southwestern, southern, and southeastern sectors of Timbang Crater within a distance of 500 meters, and to be vigilant when digging the soil around the area to avoid CO2 gas.

    Additionally, the public and tourists are advised not to enter the craters in the Dieng Complex which could potentially experience phreatic eruptions in the form of mudflows or material ejection, as well as craters with high concentrations of volcanic gas.


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