reply to post by JustMike
I repeat. NO harmonic tremors have been detected at Toba. At least not by me or PuterMan, that is.
Basically what happened is that I was receiving smaller quakes from the recent 7.7 quake area. Because these particular quakes look different than
most, in that they are long and drawn out, much like real big quakes, the teleseisisms were appearing like HT's.
But since I have confirmed these events are quakes at a closer station that I didn't even know existed until I really went looking. It is station
PS.KSI. It is very close to the epicenters of this new rupture area west of Sumatra, and tells the tale of what has been happening there much better
than any other station so far.
This is a frisky little station that doesn't show up as existing at all in many places, including GEE and the IRIS central server. (Yeah, have a go at
THAT, PuterMan, hehe- it's freaky, this station- Vase/IRIS/QuakeData will not pull this station at all or find it.) It happened to be down (it
appears) on the 25th when the big quake struck, and was having trouble previous to that. But it came back online right after, on the 26th.
And so from the 26th on, one can see the many aftershocks that have been happening, way beyond what the USGS has been reporting.
Click the green square across from KSI on whichever day you want to see, to open up the seismographs (webicorder type).
www.jamstec.go.jp...
So PuterMan that 5.0 I had real questions about turned out to be two quakes back to back, as you can see from the graphs at around 18:07 on the
29th.
As to Krakatau, I am surprised none of you have mentioned the quake that just happened on the Sunda Strait, close to it.
earthquake.usgs.gov...
But this may mean nothing, because a quick glance at the historic seismicity, and pff, the place is a quake magnet!
neic.usgs.gov...
There may be some connection between the subduction zone and the volcanoes in this case, however. The volcanoes seem to go off historically after big
quakes. Krakatau did last time in 1883. And now Merapi did as well.
But I will give every bit of credit to the volcanologists in Jakarta. They predicted the eruption of Merapi almost to the day, with two days solid
warning, and evacuations right on time. People still died, like they always will, but it is real testament to the progress science has made with
volcanoes- and one cannot dismiss the many more lives that were just saved because of it!
edit on Sat Oct 30th 2010 by TrueAmerican because:
(no reason given)