Sunquakes may originate over 1,000 km beneath Sun's surface: NASA
NASA scientists suggested seismic activity on the Sun during solar flares, sunquakes, might be originating from 1,126.5 kilometres beneath its surface. Earlier, scientists believed magnetic forces or heating of Sun's outer atmosphere caused sunquakes. Scientists' new conclusion came after observing a sunquake with unusually sharp ripples produced from a moderately strong solar flare in 2011.