Had a couple of spikes on my barograph. 1.5 mb at 1930hr, 2 mb 6hrs later at 0130hrs.
Why two pulses?
Tonga 175°W, right the other side of earth. Earth circumference about 40,000 km.
Speed of sound at 20°C 344 m per sec, but must have been supersonic.
Wind must have had an effect?
Is anybody else during the math as the americans say?