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MAP 1.1 2011/09/06 14:30:14 46.408 -119.272 1.9 14 km ( 9 mi) N of Richland, WA
MAP 2.1 2011/09/06 03:27:48 46.409 -119.266 1.4 14 km ( 9 mi) N of Richland, WA
MAP 2.3 2011/09/06 01:16:17 46.406 -119.263 1.5 14 km ( 9 mi) N of Richland, WA
MAP 1.2 2011/09/05 21:21:55 46.392 -119.260 3.2 13 km ( 8 mi) N of Richland, WA
MAP 1.0 2011/09/05 10:47:46 46.404 -119.267 0.0 14 km ( 9 mi) N of Richland, WA
MAP 1.1 2011/09/05 04:58:13 46.401 -119.264 2.2 14 km ( 8 mi) N of Richland, WA
MAP 1.0 2011/09/05 04:54:14 46.405 -119.266 2.3 14 km ( 9 mi) N of Richland, WA
MAP 2.8 2011/09/05 03:48:33 46.407 -119.266 2.1 14 km ( 9 mi) N of Richland, WA
MAP 2.1 2011/09/04 17:54:15 46.405 -119.270 1.3 14 km ( 9 mi) N of Richland, WA
MAP 1.0 2011/09/04 15:57:54 46.393 -119.262 0.8 13 km ( 8 mi) N of Richland, WA
MAP 1.1 2011/09/04 15:56:18 46.406 -119.278 0.4 14 km ( 9 mi) NNE of West Richland, WA
MAP 1.7 2011/09/04 15:51:33 46.409 -119.266 2.5 14 km ( 9 mi) N of Richland, WA
MAP 2.1 2011/09/04 11:28:53 46.406 -119.266 2.3 14 km ( 9 mi) N of Richland, WA
MAP 1.0 2011/09/04 10:44:40 46.409 -119.270 0.8 14 km ( 9 mi) N of Richland, WA
MAP 1.1 2011/09/04 09:35:02 46.408 -119.269 1.7 14 km ( 9 mi) N of Richland, WA
MAP 1.9 2011/09/04 06:57:53 46.408 -119.263 1.1 14 km ( 9 mi) N of Richland, WA
MAP 1.3 2011/09/04 06:52:26 46.405 -119.273 2.4 14 km ( 9 mi) N of Richland, WA
MAP 1.4 2011/09/04 06:38:46 46.406 -119.269 1.4 14 km ( 9 mi) N of Richland, WA
MAP 2.3 2011/09/04 06:24:37 46.407 -119.268 1.6 14 km ( 9 mi) N of Richland, WA
MAP 1.0 2011/09/04 04:52:04 46.415 -119.262 0.0 15 km ( 9 mi) N of Richland, WA
MAP 1.7 2011/09/04 04:43:46 46.408 -119.276 1.8 14 km ( 9 mi) NNE of West Richland, WA
MAP 1.1 2011/09/04 04:32:34 46.403 -119.282 3.9 13 km ( 8 mi) NNE of West Richland, WA
MAP 1.3 2011/09/04 04:30:18 46.407 -119.269 0.0 14 km ( 9 mi) N of Richland, WA
MAP 1.5 2011/09/04 04:29:39 46.398 -119.277 4.6 13 km ( 8 mi) N of Richland, WA
MAP 3.7 2011/09/04 04:13:39 46.409 -119.263 2.5 14 km ( 9 mi) N of Richland, WA
MAP 2.1 2011/09/04 01:25:37 46.408 -119.267 2.0 14 km ( 9 mi) N of Richland, WA
MAP 1.8 2011/09/02 13:26:55 46.404 -119.275 2.0 14 km ( 9 mi) N of Richland, WA
MAP 1.6 2011/09/01 05:45:35 46.587 -119.795 6.6 15 km ( 9 mi) SE of Desert Aire, WA
Magnitude 6.4
Date-Time
Friday, September 09, 2011 at 19:41:34 UTC
Friday, September 09, 2011 at 12:41:34 PM at epicenter
Time of Earthquake in other Time Zones
Location
49.493°N, 126.967°W
Depth
23 km (14.3 miles)
Region
VANCOUVER ISLAND, CANADA REGION
Distances
119 km (73 miles) WNW of Ucluelet, British Columbia, Canada
138 km (85 miles) WSW of Campbell River, British Columbia, Canada
140 km (86 miles) SSE of Port Hardy, British Columbia, Canada
289 km (179 miles) WNW of VICTORIA, British Columbia, Canada
Location Uncertainty
horizontal +/- 11.7 km (7.3 miles); depth +/- 2.8 km (1.7 miles)
Parameters
NST=777, Nph=777, Dmin=121.3 km, Rmss=1.22 sec, Gp= 29°,
M-type="moment" magnitude from initial P wave (tsuboi method) (Mi/Mwp), Version=9
Source
Magnitude: USGS NEIC (WDCS-D)
Location: USGS NEIC (WDCS-D)
Event ID
usc0005rsj
Originally posted by Rockpuck
reply to post by westcoast
Volcano off the coast: We've only mapped and know of approx 5% of the sea floor.. not surprising then to find a volcano on the floor along the Ring of Fire.
Massive magma pool: Pretty cool, but Hood hasn't erupted in 11 thousand years, and that phase was very minor. But Rainier and Helens but Adams hasn't erupted in nearly 1,500 years.
I don't think there is anything out of place.
Yet, for centuries, and even millennia, people living in seismically active regions have noted premonitory signals. The historical records talk of changes of the water level in wells, of strange weather, of ground-hugging fog, of unusual behavior of animals (both domestic and wild) that seem to feel the approach of a major earthquake. With the advent of modern science and technology the list of premonitory signals has become even longer. Among them are (i) Sporadic emissions of low to ultralowfrequency electromagnetic radiation from the ground (ii) Occasional local magnetic fi eld anomalies reaching a strength of half a percent of the Earth’s main dipole fi eld (iii) Changes in the lower atmosphere that are accompanied by the formation of haze and a reduction of moisture in the air (iv) Large patches, often tens to hundreds of thousands of square kilometers in size, seen in night-time infrared satellite images where the land surface temperature seems to fl uctuate rapidly (v) Passing perturbations in the ionosphere at 90 - 120 km altitude that affect the transmission of radio waves
The giant earthquake that struck Japan this year not only shook the Earth, but also rattled the highest layer of the atmosphere, scientists find.
This research could lead to a new type of early warning system for devastating tsunamis and earthquakes.
Investigators measured these disruptions, called seismotraveling ionospheric disturbances, using about 1,000 global positioning system (GPS) receivers in Japan and Taiwan. Disruptions of the electrically charged particles in the ionosphere would lead to anomalies in radio signals between the ground receivers and the GPS satellites, data that scientists can measure.
Scientists detected a disc-shaped rise in electron density in the ionosphere about seven minutes after the earthquake. Concentric waves of fluctuating electron density then flowed out in the ionosphere from this disk at speeds of about 450 to 500 mph (720 to 800 kph). All in all, this disruption was about three times greater than the next largest one ever seen, which came after the 2004 magnitude 9.3 Sumatra earthquake.
One important question in determining how much of a warning his phenomenon might provide is: “Is there any detectable precursor in the status of the ionosphere before this disturbance is actually observed?” said atmospheric physicist Gaopeng Lu at Duke University, who did not take part in this study. “In that way, we might be able to predict the occurrence of earthquakes.”