I was reading this article this afternoon, and thought I’d see if I had detected it on my Raspberry Shake:
The skyscraper-sized tsunami that vibrated through the entire planet and no one saw (theconversation.com)
I couldn’t see anything obvious, so decided to look for a Shake closer to the event to see what, exactly, I was looking for (e.g. frequencies, etc).
Eventually I found shake R42BF near Reykjavik in Iceland was in service at that time.
I got the date and time from the YouTube video linked in the article: 16th September, 2023 12:35:10 UTC.
From the animation in the video I also estimated the arrival time at Reykjavik as about 12:43 UTC.
I used my Comspect python code to compare the spectrum before the landslide that triggered the tsunami with the spectrum afterwards. Generally speaking the tsunami had a characteristic frequency of about 0.3 Hz.
Below are comparisons for the first few hours and then each day till the signal was pretty close to normal.
The Comspect.py code is available on Github at GitHub - sheeny72/RPiSandB: Python programs for Raspberry Shake and Boom seismometers and infrasound detectors. if you want to check if your shake detected the tsunami.
Al.
