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TEMPO.CO, Jakarta - Social media users on Wednesday noon, March 9, were shocked by loud mysterious thumping or booming sounds seemingly originating from the sky above the Yogyakarta region, known as skyquake.
A number of valid institutions that could provide answers in the field were unable to pinpoint the source of the sound heard in Sleman, Kulon Progo, and several areas in Magelang, Central Java.
Initial suspicion suggests that the thumping came from supersonic sounds from aviation activities in Sleman, which is home to the Air Force base (Lanud) Adisutjipto Yogyakarta. However, the airbase put down the suspicion as there was no jet training on that day.
“There were no jets in training today over the skies of Yogyakarta, just ordinary aircraft,” said Suprih Andryanto, spokesperson for the air force base.
He confirmed that there were only propeller planes which are unable to reach supersonic speeds that create the sonic boom sound.
Meanwhile, the Meteorology, Climatology, and Geophysics Agency (BMKG) Yogyakarta said there was initial information that the loud booms came from fighter jets in a training session over the Yogyakarta International Airport (YIA) but this was unable to be confirmed.
“It is unable to be confirmed whether the loud boom came from aircraft,” said Warjono, head of YIA meteorology station who did not personally hear the sound many people were talking about.
Although the BMKG could confirm that the loud boom was not linked to natural weather or geological activities.
The Yogyakarta administration even had to issue a clarification regarding the skyquake phenomenon on social media and debunked the theory that the loud boom came from volcanic activities in Mount Merapi.
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PRIBADI WICAKSONO (CONTRIBUTOR)
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