[link to www.isthisthingon.org]

CLASSIC harmonic signals there. and classic A types too

A types are signals of rock cracking, harmonics are magma injection

so what that chart is showing is magma injection deep down, along with rock fracture signals.

after a couple of good A type quakes, a 15 hour period of sustained harmonics got going at 5am

if you want to know what harmonics really look like, look at the signal at 05:19MST

CLASSIC one that is, and will give you an idea what to look for

later on they all merge into a mess of colour, but that was the first really good one of the day

did a quick image of that chart to explain what i mean..

[link to oi59.tinypic.com]

to ME, it looks like a couple of quakes fractured rock, allowing magma to pump in, and the chamber pressurised in a 15 hour period of magma pumping in

what is weird is as i was reading this thread, Volcano Hell, a documentary about Bernard Chouet and his discovery about Harmonic tremors is on the TV.

He was basically drawing that signal at 05:19MST on a blackboard.