Post AFUb34eylkqpZbWYuu by jkoski@mstdn.io
 (DIR) More posts by jkoski@mstdn.io
 (DIR) Post #AFTjua9f0XGn4lwNyy by sebastian@chaos.social
       2022-01-15T22:04:11Z
       
       2 likes, 12 repeats
       
       Okay there's something really cool I've just learned. If you are continuously recording air pressure e.g. as part of your home automation setup or a weather station then you should really check the data of the last 24h. You should be able to spot the pressure wave from the volcanic explosion in Tonga earlier today.It reached my setup in Kaiserslautern at about 20:30.
       
 (DIR) Post #AFTjubld0rEc4oiDnk by sebastian@chaos.social
       2022-01-15T22:28:59Z
       
       1 likes, 0 repeats
       
       Interesting. According to https://www.tsunami.gov/events/PHEB/2022/01/15/22015050/1/WECA43/WECA43.txt the explosion happend around 5:27 (my localtime) at 20.5 175.4. According to google maps thats 12142km away from me.12142km /15h = 809.5km/h = 225m/s so Mach 0.66 at sea level. Shouldn't it be a bit closer to the speed of sound?
       
 (DIR) Post #AFTjudOexE3B89yuHI by sebastian@chaos.social
       2022-01-15T22:35:36Z
       
       0 likes, 0 repeats
       
       On the other hand, it probably was initially. But the length of the wave front grows the father it gets away, from the source. It should get slower as it has to move more and more air, but it doesn't get any additional energy.
       
 (DIR) Post #AFTozDBaKgWl3drrjU by piggo@piggo.space
       2022-01-15T23:42:13.024882Z
       
       0 likes, 0 repeats
       
       @sebastian @FailForward I see it on my system! wow
       
 (DIR) Post #AFTyPkLwXXa52YRMtE by kumicota@weeaboo.space
       2022-01-16T01:27:51.543387Z
       
       0 likes, 0 repeats
       
       @sebastian what sensor do you use?
       
 (DIR) Post #AFUY4kchw6iU9CZNlw by selea@social.linux.pizza
       2022-01-16T08:07:11Z
       
       0 likes, 0 repeats
       
       @sebastian The other side of the globe, amazing!
       
 (DIR) Post #AFUaxbiSxDDEMFY3mq by jkoski@mstdn.io
       2022-01-16T08:39:46Z
       
       0 likes, 0 repeats
       
       @sebastian Southern Finland, data logging interval 5 minutes. (RuuviTag)Peaks at ~20:16
       
 (DIR) Post #AFUb34eylkqpZbWYuu by jkoski@mstdn.io
       2022-01-16T08:40:45Z
       
       0 likes, 0 repeats
       
       @sebastian Southern Finland, data logging interval 5 minutes. (RuuviTag)Peaks at ~20:17
       
 (DIR) Post #AFV77soJRwaInuE7d2 by sebastian@chaos.social
       2022-01-16T14:32:39Z
       
       1 likes, 0 repeats
       
       @kumicota BME280 I got as part of a weather station kit  a while ago.