This looked initially as if it was an event in China that occurred at 7 am approximately. The only problem is that I cannot find anything listed for
an event in China. The LISS world wide server is showing this event on all Chinese helis.
aslwww.cr.usgs.gov...
There is however also an event showing on the Australian heli for Charter Towers.
aslwww.cr.usgs.gov...
This one however is most likely the culprit and if that is the case then what we are looking at is a 5.8 in New Britain (PNG).
Magnitude 5.8
Date-Time
* Tuesday, November 02, 2010 at 06:39:55 UTC
* Tuesday, November 02, 2010 at 04:39:55 PM at epicenter
* Time of Earthquake in other Time Zones
Location 5.378°S, 151.545°E
Depth 41 km (25.5 miles)
Region NEW BRITAIN REGION, PAPUA NEW GUINEA
Distances 150 km (90 miles) SSW of Rabaul, New Britain, PNG
155 km (95 miles) E of Kimbe, New Britain, PNG
660 km (410 miles) NE of PORT MORESBY, Papua New Guinea
2445 km (1520 miles) N of BRISBANE, Queensland, Australia
Location Uncertainty horizontal +/- 14.3 km (8.9 miles); depth +/- 0.3 km (0.2 miles)
Parameters NST=329, Nph=347, Dmin=148.1 km, Rmss=1.02 sec, Gp= 22°,
M-type="moment" magnitude from initial P wave (tsuboi method) (Mi/Mwp), Version=1
Source
* USGS NEIC (WDCS-D)
Event ID usa000475s
The theoretical p-wave travel times would seem to suggest that it was indeed the PNG quake as far as the Australian wave is concerned, and also the
same event that is being shown for the Chinese webicorders.
City Distance
(degrees) Travel Time
(min:secs) Arrival Time
UTC Phase
Agana, Guam 19.90 4:27.9 6:44:22.9 P
Brisbane, Australia 22.04 4:51.0 6:44:46.0 P
Wellington, New Zealand 41.35 7:41.7 6:47:36.7 P
Tokyo, Japan 42.30 7:49.5 6:47:44.5 P
Beijing, China 55.46 9:30.4 6:49:25.4 P
Honolulu, Hawaii 56.27 9:36.2 6:49:31.2 P
Kathmandu, Nepal 71.77 11:18.1 6:51:13.1 P
Anchorage, Alaska 80.22 12:06.2 6:52:01.2 P
San Francisco, California 90.13 12:55.7 6:52:50.7 P
Seattle, Washington 91.35 13:01.4 6:52:56.4 P
Los Angeles, California 93.15 13:09.7 6:53:04.7 P
Phoenix, Arizona 98.26 13:32.8 6:53:27.8 P
Albuquerque, New Mexico 102.75 13:52.7 6:53:47.7 Pdiff
Palmer Station, Antarctica 102.82 13:53.0 6:53:48.0 Pdiff
Golden, Colorado 103.61 13:56.5 6:53:51.5 Pdiff
Moscow, Russia 107.72 14:14.7 6:54:09.7 Pdiff
Mexico City, Mexico 109.95 14:24.7 6:54:19.7 Pdiff
Wichita, Kansas 109.95 14:24.6 6:54:19.6 Pdiff
Brownsville, Texas 111.18 14:30.1 6:54:25.1 Pdiff
Duluth, Minnesota 111.77 14:32.7 6:54:27.7 Pdiff
Nairobi, Kenya 114.46 14:44.6 6:54:39.6 Pdiff
St. Louis, Missouri 115.24 14:48.1 6:54:43.1 Pdiff
Bergen, Norway 119.46 15:06.9 6:55:01.9 Pdiff
Knoxville, Tennessee 119.86 15:08.6 6:55:03.6 Pdiff
Ottawa, Canada 122.83 15:21.8 6:55:16.8 Pdiff
Washington, D.C. 124.91 15:31.1 6:55:26.1 Pdiff
Philadelphia, Pennsylvania 125.76 15:34.8 6:55:29.8 Pdiff
New York, New York 126.20 15:36.8 6:55:31.8 Pdiff
Miami, Florida 126.61 15:38.6 6:55:33.6 Pdiff
Boston, Massachusetts 127.28 15:41.6 6:55:36.6 Pdiff
Bangor, Maine 127.30 15:41.7 6:55:36.7 Pdiff
London, England 128.37 15:46.4 6:55:41.4 Pdiff
Rome, Italy 128.57 15:47.3 6:55:42.3 Pdiff
Lima, Peru 128.66 15:47.7 6:55:42.7 Pdiff
San Juan, Puerto Rico 141.01 16:42.5 6:56:37.5 Pdiff
Note the wave theoretically turning up in the US/Canada just before 7 am UTC.
This is not born out by the recorders, and most of the States would appear to be in the p-wave shadow zone for this event.
neic.usgs.gov...
There is no event showing within the US that would rattle all the helicorders at around 07:20+ to 07:30+ UTC which is when the wave is showing in most
areas. If you look at the times this wave is sweeping in from the North West - Alaska direction so is it is the wave coming back round for a second
time as it missed it in the shadow area first time round? I would not have thought it a strong enough quake to do that in view of the depth.
You could say the whole country had a seismic event, but I believe the source was PNG and not in the US.
I am I have to say a touch curious that the event at PNG should have shown so far afield. Maybe it was actually two events. We have had such recently
and from that sort of area. It might explain the ringing especially if the shallow one masked a deeper one.
Just my 2c