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Post a picture of the Tonga event, measured by your sensors

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I noticed a lot of articles from people measuring the compression wave created by the vulcano near Tonga.
Attached an image what we observed. Who else found this in his data and what sensor did you use?

See also:
for comparison.



I didn't know a volcano eruption can be registered as a slow oscillation in the atmospheric pressure all around the Earth.  :o

--- Quote ---Why is the second spike in the graph going "down"?

I can't fully explain it either. My strongest guess is that it's the measurement interval, so it's just a distortion of the recording. Our station records everything for 5 minutes, which is perfectly adequate for normal weather conditions.
--- End quote ---
Source: Google translation of

That fragment gave the idea that maybe weather stations should use much faster recording intervals (unless the power budget for the sensors are very, very low, which is usually not the case).

Later, the data can be compressed for longer storage, and if lossless compression is not enough, when running out of storage space change the lossless compression into a lossy compression.  Since any weather variations are rather slow, the compression ratio is expected to be very good, so the amount of storage space won't increase much, while such unexpected events would be captured with better resolution.

Nothing spectacular but clearly visible:

Here’s a picture of the data I’ve captured with a simple Bosch BME680 and a 1 minute sample rate.


Whoever engineered the data pipe from Tonga has no backup plan for critical communications infrastructure. If the Internet went down for a month due to a massive cyber attack by our enemy, there would be chaos because there is no backup to a lot of critical infrastructure.


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