Just a small one close to me last evening
Reference Number 3466704
Universal Time February 18 2011 at 4:51
NZ Daylight Time Friday, February 18 2011 at 5:51 pm
Latitude, Longitude -41.37957 174.63791
Focal Depth 25 km
Richter magnitude 3.919ML
Region Wellington
Location * 20 km south-west of Wellington
www.geonet.org.nz...
But what is interesting is the LISS graph for this. I think the signal is so large because the quake was only 9.57km from SNZO station
Look how the line went all funny before and after it
I had a look at SNZO through IRIS Bud Explorer Quack Query and it showed this on the HNZ Channel
I'm not too sure if I got the right graph image, last night I seen the "pipecleaner" one
Actually HN1 Channel shows it clearer
www.iris.edu...
There is nothing from Geonet Search, at the moment the 3.9 is the first quake of the 28th Feb UTC
Surely that red signal is not from this? a delayed arrival?
5.3 2011/02/18 04:23:18 -4.665 153.140 54.1 NEW IRELAND REGION, PAPUA NEW GUINEA
looking at USGS Phase Data for this quake, they don't give the Arrival Time at SNZO, but do have OUZ at 04:30:51.84
neic.usgs.gov...
or maybe that signal I marked on the LISS graph is the New Ireland quake and not the Cook Strait one at all.
The way the lines converge on 4:00 time mark on the left hand side, it could be, see there is a smaller wiggle on the next line down coming out of
4:00 also but dropping to 5:00-5:10 line
edit: And this, Geonets SNZO Quake Drum graph, shows another quake ( local?) 20 minutes prior to the 3.9
Will have to wait about 4-8hrs for Geonet to publish the 18th's data I guess
edit on 18-2-2011 by muzzy because: (no reason
given)