Dr. Milton Garces

Does it produce infrasound?

Everybody told me, no, Kilauea does not produce infrasound.

It's like, hmm, that's unlikely.

So...

We made the first basically polished paper of infrasound from Kīlauea volcano.

And what you're hearing there is Kīlauea in one of its many incarnations because it's a dynamic system.

And this is what it does all the time.

At the time of that recording, it was an open vent.

It had been in an eruption for over 20 years.

And that's what it was radiating all the time.

All the time.

Now, I don't know if you've seen the activity, the most predictable is

ever been like every week now it erupts and it's really cool to observe that so then opens up and fire fountains and what you hear is a variant of that and it's echoic because it's in a giant caldera right so everything rings so you get this cathedral effect if you listen to it correctly right it takes a lot of effort to insonify something as grandiose as a volcanic eruption into our

A very limited response.

So the best I can do is stick into the bass range, you know, like the standoff bass range, and try to make something that conveys that feeling of strength, you know, that comes from the sound field.

You would think so, but pitch shifting past a few octaves doesn't map very well.

You have a lot of artifacts.

So the other way you can do is transpose, which is basically of a sound compression.

And you have to do it in a way that doesn't speed up too much because then it's very short.

So there is a lot of, there's some thoughts that have to go into that.