I would like to believe I captured, somewhat poorly, this eq. If so, it surpasses my best distance by 1K miles or so. Or is this just a happy coincidence? It is an awful small eq for this distance, but I have captured eqs of this magnitude at surprising distances.
1 Like
You can definitely believe it!
Even at more than 18500km away, your Shake managed to get the arriving waves quite nicely, I’d say.
In particular, you have clear, distinct arrivals: PKIKP (waves that travel through Earth’s solid inner core - at the P marker) and PKP (waves that are transmitted through the liquid outer core only - the higher-amplitude waves ~60 seconds later).
It’s an excellent capture for “only” an M6.2 from the other side of the world.
1 Like
Thanks for the confirmation Stormchaser, and the additional info. I have been so impressed by the sensitivity of my S&B, which sits on the concrete floor of my ground level garage. These are such amazing devices! This is a keeper for me.
2 Likes
Honestly, it’s the same thought I had when I discovered I could receive signals from earthquakes around the Kermadecs, 17000km away from where I live.
Way before starting to work for Raspberry Shake. What a unit, really.
Also, I think you may have detected the M5.9 aftershock from the same area that happened yesterday. Probably with a smaller amplitude.
Interesting. Kermadecs appears to be a shadow zone for me.
On the aftershock, I think the data is less clear, and by my typical judgement would be one I’d consider a miss.
1 Like
Yes, in the end the initial shock (M6.2) was about 2 times stronger in terms of amplitude, and about 3 times stronger in terms of energy release compared to this one (M5.9), so having less evident arrivals becomes understandable.
I can still see a more pronounced PKP arrival (the second, larger one), but both of them barely appear on the spectrogram compared to the other earthquake, that’s for sure.