Deep earthquake with 7.5 Magnitude Hits Off Eastern Russia, North of Japan: USGS

7.3 166km ENE of Poronaysk, Russia 2012-08-14 02:59:38 49.679°N 145.300°E 582.1 http://earthquake.usgs.gov/earthquakes/eventpage/pt12227000#summary
7.3 169km ESE of Poronaysk, Russia 2012-08-14 02:58:28 48.700°N 145.300°E 582.0 http://earthquake.usgs.gov/earthquakes/eventpage/at00m8q5lg#summary

You often get double automatic reports from the seismo's, as different networks triangulate it differently.

And if one was produced, the Kuril or Sakhalin Islands should be able to block any Tsunami from going any further. Sakhalin is the the West, the Kuril Islands are to the west (Both are controlled by Russia).

Tsunami warning center:
http://wcatwc.arh.noaa.gov/

From the above cite:

Information Evaluation: * There is no tsunami danger for the areas listed above. * Based on the depth of the earthquake, a tsunami is not expected. Issued at: Mon Aug 13 2012 23:14:45 GMT-0400 (Eastern Daylight Time)

i.e., I was wrong, the Kuril islands did NOT block any Tsunami, the earthquake was do deep to produce a Tsunami.

More on the Earthquake:


Tectonic Summary

Seismotectonics of the Kuril-Kamchatka Arc

The arc extends about 2,100 km from Hokkaido, Japan, along the Kuril Islands and the Pacific coast of the Kamchatka, Russia, peninsula to its intersection with the Aleutian arc near the Commander Islands, Russia. It marks the region where the Pacific plate subducts into the mantle beneath the Okhotsk microplate, a part of the larger North America plate. This subduction is responsible for the generation of the Kuril Islands chain and the deep offshore Kuril-Kamchatka trench. Relative to a fixed North America plate, the Pacific plate is moving northwest at a rate that decreases from 83 mm per year at the arc's southern end to 75 mm per year near its northern edge.

Subduction zones such as the Kuril-Kamchatka arc are geologically complex and produce numerous earthquakes from multiple sources. Deformation of the overriding North America plate generates shallow crustal earthquakes, whereas slip at the interface of the plates generates interplate earthquakes that extend from near the base of the trench to depths of 40 to 60 km. At greater depths, Kuril-Kamchatka arc earthquakes occur within the subducting Pacific plate and can reach depths of nearly 700 km. Since 1900, eight great earthquakes (M8.3 or larger) have occurred along the Kuril-Kamchatka arc. They are the M8.4 1923 Kamchatka earthquake, the M8.6 1933 Sanriku-oki, Japan earthquake, the M9.0 1952 Kuril Island earthquake, the M8.4 1958 Kuril Island earthquake, the M8.5 1963 Kuril Island earthquake, the M8.4 1994 Kuril Island earthquake, the M8.3 2003 Hokkiado, Japan earthquake, and the M8.3 2006 Kuril Island earthquake.

A Wadati–Benioff zone (also Benioff–Wadati zone or Benioff zone or Benioff seismic zone) is a deep active seismic area in a subduction zone. Differential motion along the zone produces deep-seated earthquakes, the foci of which may be as deep as about 700 kilometres (430 mi). The term was named for the two seismologists, Hugo Benioff of the California Institute of Technology, and Kiyoo Wadati of the Japan Meteorological Agency who independently discovered the zones.

They develop beneath volcanic island arcs and continental margins above active subduction zones. They can be produced by slip along the subduction thrust fault or slip on faults within the downgoing plate, as a result of bending and extension as the plate is pulled into the mantle. The deep earthquakes along the zone allow seismologists to map the three-dimensional surface of a subducting slab of oceanic crust and mantle.

http://en.wikipedia.org/wiki/Wadati-Benioff_zone


so the movement over there (asia/indian plates) is also occurring at the mantle level as well...

Not to sound nuts but are these deep quakes any indication of magnetics or polarity shifts? aren't they related in some way...?

As far as polarity shifts no, they have pretty much zilch to do with plate tectonics. There is a great deal of residual heat from the formation of the Earth, as well as radioactive material giving off heat as it decays, all of which drives plate tectonics. Heat rises through the mantle, pushes against the crust driving it apart in places, and edges of the plates furthest away from these pushed areas are forced under into the magma-y deep. We know precious little about the core, which is a spinning ball of iron which creates the magnetic field. We do know that the field isn't created symmetrically and over time something has to give in the magnetic field, that's when you have flips. Your fillings won't get ripped out, planes won't fall from the sky, birds won't slither on the ground. Compasses will get screwy, the Earth will be a little less protected from incoming solar radiation, so there will likely be some increase in cancers and mutations but not enough to get freaked out about. The Earth's core will continue spinning for billions of years, and thus there will always be a magnetic field but with varying strength and polarity as it constantly tries to find an impossible balance with itself.

It's cool (well, hot I guess) stuff and you'll be fine. Worry less.

That may change.

http://earthquake.usgs.gov/earthquakes/eventpage/usc000bz29#summary

even if it's deep and won't affect the surface as much...that's a Biggie...

There will be 20,000+ Earthquakes in 2012! At least 100 x 6.0+ Earthquakes, 15 x 7.0+ Earthquakes and at least 1 8.0 or Higher! Earthquakes"

Or is this a Mayan thing?