JAKARTA - The Center for Volcanology and Geological Hazard Mitigation (PVMBG) recorded a loud bang and a reddish flash of light that occurred in the northern area of Cianjur, West Java, related to atmospheric and geophysical phenomena although it has not found the exact trigger.
PVMBG's Earth Utama investigator Supartoyo said the loud noise and reddish light that had been seen and felt by the public in a number of sub-districts in the northern Cianjur area were allegedly triggered by electromagnetic energy phenomena.
"We are still investigating the causes of the energy phenomenon, including the trigger because there is no seismic activity that usually triggers the occurrence of this natural phenomenon," he said as reported by ANTARA, Tuesday, January 6.
Meanwhile, based on information from the Meteorology, Climatology and Geophysics Agency (BMKG), it is suspected that the sound of thunder and flashes of light that residents in several northern Cianjur sub-districts such as Pacet, Cipanas, and Sukaresmi had seen were due to human activity.
This is because according to the Head of the West Java BMKG, Teguh Rahayu, when the event occurred there was no earthquake and lightning activity in the Cianjur area which was recorded at the Bandung BMKG, so his party suspected that it was man-made.
"Officers and equipment installed at the Bandung BMKG did not show any earthquake and lightning storm activity in the Cianjur area, so we suspect that the activity is man-made," he said.
Meanwhile, the Head of the Cianjur BPBD, Iwan Karyadi, asked the public to remain calm and not panic with the incident on Monday evening, because his party was still tracing the exact information about the cause of the noise and light flashes that had disturbed residents.
"We are still looking for the exact information so that residents do not panic but remain vigilant, we have coordinated with PVMBG and BMKG what caused the sound of thunder and flashes of light that occurred that night," he said.
Previously, residents in several sub-districts in the north of Cianjur, namely in Pacet, Cipanas and Sukaresmi sub-districts, had heard a loud noise on Monday evening at around 22.15 WIB, so they scattered out of their houses.
Not long after, residents saw a reddish glow in the sky, so they chose to stay outside the house for quite a while for fear of something undesirable happening, until around midnight most of the residents went back inside.
"The sound was rumbling accompanied by a fairly loud bang, so we ran out of the house, in a matter of seconds followed by a flash of reddish light in the sky, half an hour later we just went inside," said Cipanas resident Dede Sandi.
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