Observations from several private weather stations are indicating that a major pressure wave due to #Tongaeruption reached #India very close to 9 pm IST on 15 Jan and the resultant increase in the air pressure (~2 mb) was maximum very close to 9.15 pm IST.
Based on first-order calculations, the pressure wave due to #Tongaeruption appears to have travelled at ~945 km/hr to reach #Mumbai & #India on Saturday, 15 Jan night (local time). This is close to the typical cruising speed of commercial passenger aircrafts.
The pressure wave due to #Tongaeruption passed through #India a little after 9 pm IST on Sat, 15 Jan. A private weather station (IDAHAN1) to the north of Palghar #Mumbai detected a sharp fluctuation (~2 mb) in the mean sea-level pressure.
The pressure wave from #TongaVolcanoEruption was recorded by @UniRdg_Met's observatory a little after 1900 hrs UTC yesterday (15 Jan 2022). Notice the jump in the mean sea-level pressure, which is highlighted by a red oval in the figure.