As per tweets by Bengaluru citizens, the sound was heard in Rajarajeshwari Nagar, Nagasandra, Banashankari, Vijaynagar and other areas.

An aerial view of Bengaluru city Bangalore PTI
news Social Friday, November 26, 2021 - 12:51

Another loud sound was heard in Bengaluru on Friday, November 26, as many Bengalureans took to social media to share that they heard a loud ‘boom’ sound. The sound was heard around 12.15 pm on Friday, users shared. “Just now heard a loud explosion sound in Bengaluru, then doors and windows vibrated. I felt this in Rajarajeshwari Nagara. #Bengaluru #Bangalore #SonicBoom? Others felt too??” a social media users asked. 

“Loud sound heard again in various parts of Bengaluru along with rattling of windows. What happened this time ? Sonic boom ? Earthquake ? Quarry blast ?” tweeted a journalist. 

As per tweets by Bengaluru citizens, the sound was heard in Rajarajeshwari Nagar,, Banashankari, Vijaynagar, Uttarahalli, Kengeri and some surrounding areas in Bengaluru south. A couple of users also shared that they had felt some slight tremors as well. 

It is not yet known what caused the loud sound in Bengaluru. In a statement, the Karnataka State Natural Disaster Monitoring Centre (KSNDMC) ruled out any seismic activity that could have caused the loud sound and slight tremors.

"Reports of sound associated with mild vibrations by the local residents was received from Hemmigepura, Kengeri, Gnanabharathi, Rajarajeswari Nagar and Kaggalipura, Bengaluru today, dated 26.11.2021 between 11.50 am - 12.15 pm. The data was analysed from our Seismic Observatories for any seismic signatures /possible earthquake signals during the said time period. The seismographs shows no signatures of local tremor / earthquake," the KSNDMC said.

This is not the first time that such an incident has taken place in the city. In July this year, several residents in the areas of Sarjapur, JP Nagar, Benson Town, Ulsoor, ISRO layout and HSR layout said that they heard a loud ‘thud’ and a 'boom' sound. Some residents even said that their windows were rattled by the sound. 

While there was speculation that the sound could have been a ‘sonic boom’ generated by a fighter jet flying over the city, neither the police nor Air Force offered an explanation at the time. The Hindustan Aeronautics Limited (HAL) had said that none of its flights made the noise. The sound was heard in areas like Cooke Town, Vivek Nagar, Ramamurthy Nagar, Hosur Road, HAL, Old Madras Road, Ulsoor, Kundanahalli, Kammanahalli, CV Raman Nagar, Whitefield and HSR Layout. 

A similar ‘boom’ sound was heard in Bengaluru in May last year. The Indian Air Force later confirmed that it was made by a Sukhoi 30. A sonic boom is the result of an object moving faster than the speed of sound, which travels at 343 metres per second in the air. The phenomenon creates shock waves in the atmosphere, which in turn leads to the loud sound being produced. 

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