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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.
#TongaVolcanoEruption
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 #MumbaiMMR around 9 pm IST, 15 Jan, which was about 12 hours after the main volcanic eruption (9.40 am IST, 15 Jan) at Hunga Tonga-Hunga Ha'apai.
The great circle distance between the volcano & Mumbai is over 11,000 km! https://twitter.com/akshaydeoras/status/1482681503687577601
The pressure wave due to #Tongaeruption passed through #MumbaiMMR around 9 pm IST, 15 Jan, which was about 12 hours after the main volcanic eruption (9.40 am IST, 15 Jan) at Hunga Tonga-Hunga Ha'apai.
The great circle distance between the volcano & Mumbai is over 11,000 km!
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.
Image: WunderMap
#TongaVolcanoEruption