Shockwave analysis of the Hunga Tonga volcano based on Twitter ;-)

Here is the shockwave signal of the volcano explosion detected at various weather stations worldwide. The travel speed of the shockwave is about 1087 km/h, so less than the speed of sound. Data based on Twitter! The accuracy is not very high ;-)

Although the quality of the Twitter data prevents any serious consideration, I tried to evaluate the intensity of the shockwave with the distance from the Hunga Tonga volcano. Excepted for the stations closer to the volcano (< 2000 km), the change in pressure is 2-3 hPa almost everywhere on the Earth. Even if the Hunga Tonga explosion is not comparable to the Krakatoa, similar values were detected after its eruption in 1883. 

Brave people can read this study published in 1888

The Eruption of Krakatoa, And Subsequent Phenomena