On Jan 30, 8:01*am, Charley wrote:
On Jan 29, 10:38*pm, Belba Grubb wrote:

The latest AVO statement says things at the summit picked up between
5:30 and 7:30 but have calmed down again.

On their general info Webicorder page, there is an interesting sample
of what harmonic tremor looks like on these Webicorders. Going by that
example, on REF there could be tremor ongoing at around 4:00 or so and
later; it might have been showing up on the 3:30 line, too, though
there are still what might be some earthquakes on there, too (more so
than on the 4:00 line and less so than on the 3:00 line). I haven't
checked the other lively Webicorder (RSO) out yet; just taking a work
break.

Is that common, to have the earthquake signals diminish as the tremor
signal increases? It would seem to make sense -- if magma is moving,
not busting through rock or a plug or something, there wouldn't be
quakes, just a flow.

I misread the AVO statements at first, and thought they were saying
that somebody was in the hut 24 hours a day. Whoa!

Re timing of earthquakes and tremors, I'm not sure, but I would
imagine that they occur together. *It seems that as magma is moving,
surrounding rocks would also be adjusting for the loss of pressure in
the evacuated zones of the chamber(s). *This is just a loose
hypothesis though. *Thanks for the input!

I have the present spell as a negative NAO (North Atlantic charts:
http://www.wzkarten.de/pics/bracka.gif) which is an high volcanicity
spell.

From the start of next week's one, Britain is considering snow -which
indicates a change of potential to deeper Lows and higher (and/or
more) Highs.

Having given it as a Fine weather spell it is also one that places one
of them over 0 degrees longitude. It also requires the Greenland High
to grow.

I can't see that occurring overnight. And of course the idea of a
major eruption without a series of suitable spells is hardly likely to
bear fruit.

So that leaves us with... hmm... some comparative phases on he
http://my.opera.com/Weatherlawyer/blog/2009/01/26/07-55