Mysuru: It was neither an earthquake nor a quarry blast. The loud sound that was heard at around 12.45 pm yesterday was in fact, a ‘Sonic Boom’ created by a Supersonic Jet. Due to the loud sound, rumours spread that there was an earthquake. Panicked residents, especially from Kuvempunagar, Saraswathipuram, V.V. Puram, Railway Yard, Paduvarahalli,…