Magnitude 4.2 - = HUDSON BAY ISLANDS, NUNAVUT, CANADA

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Magnitude 4.2 - HUDSON BAY ISLANDS, NUNAVUT, CANADA

2009 March 21 19:17:54 UTC

Versi=F3n = en=20 Espa=F1ol

Details
Summary
Maps
Scientific=20 & Technical
Additional=20 Info

Where = can I=20 find...?

Earthquake Details

Magni= tude 4.2

Date-Time<= /A>

Saturday, March 21, 2009 at 19:17:54 UTC
Saturday, March 21, 2009 at 03:17:54 PM at epicenter=20
Time of Earthquake in other Time = Zones

Locati= on 61.788=B0N, 79.211=B0W

Depth= 10 km (6.2 miles) set by location program

Region HUDSON BAY ISLANDS, NUNAVUT, CANADA

Dista= nces 195 km (120 miles) WSW of Salluit, Quebec, Canada
220 = km=20 (140 miles) NNW of Puvirnituq, Quebec, Canada
1740 km = (1080=20 miles) NNW of QUEBEC, Quebec, Canada
1845 km (1150 = miles) N of=20 Montreal, Quebec, Canada

Loc= ation=20 Uncertainty horizontal +/- 8.9 km (5.5 miles); depth fixed by location=20 program

Para= meters NST=3D 41, Nph=3D 41, Dmin=3D>999 km, Rmss=3D1.4 sec, Gp=3D=20 65=B0,
M-type=3Dbody wave magnitude (Mb), Version=3DQ

Source

USGS NEIC (WDCS-D)

Event=20 ID us2009elbg

This event has been reviewed by a seismologist.=20
Did = you feel=20 it? Report shaking and damage at your location. You can = also view=20 a map displaying accumulated data from your report and others. =

Earthquake Summary

Tectonic Summary

EARTHQUAKES IN THE STABLE CONTINENTAL REGION
Most of North = America=20 east of the Rocky Mountains has infrequent earthquakes. Here and there=20 earthquakes are more numerous, for example in the New Madrid seismic = zone=20 centered on southeastern Missouri, in the Charlevoix-Kamouraska seismic = zone of=20 eastern Quebec, in New England, in the New York - Philadelphia - = Wilmington=20 urban corridor, and elsewhere. However, most of the enormous region from = the=20 Rockies to the Atlantic can go years without an earthquake large enough = to be=20 felt, and several U.S. states have never reported a damaging earthquake. = The=20 earthquakes that do occur strike anywhere at irregular intervals.

Earthquakes east of the Rocky Mountains, although less frequent than = in the=20 West, are typically felt over a much broader region. East of the = Rockies, an=20 earthquake can be felt over an area as much as ten times larger than a = similar=20 magnitude earthquake on the west coast. A magnitude 4.0 eastern U.S. = earthquake=20 typically can be felt at many places as far as 100 km (60 mi) from where = it=20 occurred, and it infrequently causes damage near its source. A magnitude = 5.5=20 eastern U.S. earthquake usually can be felt as far as 500 km (300 mi) = from where=20 it occurred, and sometimes causes damage as far away as 40 km (25 mi). =

FAULTS
Earthquakes everywhere occur on faults within = bedrock,=20 usually miles deep. Most of the region's bedrock was formed as several=20 generations of mountains rose and were eroded down again over the last = billion=20 or so years.

At well-studied plate boundaries like the San Andreas fault system in = California, often scientists can determine the name of the specific = fault that=20 is responsible for an earthquake. In contrast, east of the Rocky = Mountains this=20 is rarely the case. All parts of this vast region are far from the = nearest plate=20 boundaries, which, for the U.S., are to the east in the center of the = Atlantic=20 Ocean, to the south in the Caribbean Sea, and to the west in California = and=20 offshore from Washington and Oregon. The region is laced with known = faults but=20 numerous smaller or deeply buried faults remain undetected. Even most of = the=20 known faults are poorly located at earthquake depths. Accordingly, few=20 earthquakes east of the Rockies can be linked to named faults. It is = difficult=20 to determine if a known fault is still active and could slip and cause = an=20 earthquake. In most areas east of the Rockies, the best guide to = earthquake=20 hazards is the earthquakes themselves.

Earthquake=20 Information for Canada

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Did = you feel=20 it? Report shaking and damage at your location. You can = also view=20 a map displaying accumulated data from your report and others. =

Scientific & Technical Information

Historic Moment Tensor Solutions=20
Phase=20 Data=20
Theoretical = P-Wave Travel Times

Additional Information, News Reports

Earthquakes = Canada=20

Preliminary Earthquake Report=20
U.S. = Geological=20 Survey, National Earthquake Information Center:
World Data = Center for=20 Seismology, Denver

Magni= tude	4.2
Date-Time<= /A>	Saturday, March 21, 2009 at 19:17:54 UTC Saturday, March 21, 2009 at 03:17:54 PM at epicenter=20 Time of Earthquake in other Time = Zones
Locati= on	61.788=B0N, 79.211=B0W
Depth=	10 km (6.2 miles) set by location program
Region	HUDSON BAY ISLANDS, NUNAVUT, CANADA
Dista= nces	195 km (120 miles) WSW of Salluit, Quebec, Canada 220 = km=20 (140 miles) NNW of Puvirnituq, Quebec, Canada 1740 km = (1080=20 miles) NNW of QUEBEC, Quebec, Canada 1845 km (1150 = miles) N of=20 Montreal, Quebec, Canada
Loc= ation=20 Uncertainty	horizontal +/- 8.9 km (5.5 miles); depth fixed by location=20 program
Para= meters	NST=3D 41, Nph=3D 41, Dmin=3D>999 km, Rmss=3D1.4 sec, Gp=3D=20 65=B0, M-type=3Dbody wave magnitude (Mb), Version=3DQ
Source	USGS NEIC (WDCS-D)
Event=20 ID	us2009elbg