Re: We are, a mass extinction event.

This just in...
quote:
Tremors deep inside the Earth are usually produced by magma flowing
beneath volcanoes, but a new study suggests they can also be produced
by the shifting and sliding of tectonic plates.

Scientists have recorded vibrations from underground tremors at a
geologic observatory along the San Andreas Fault, an 800 mile scar in
the earth that runs through California. The fault marks the boundary
between the Pacific Tectonic Plate and the North American Plate.

Tectonic plates are large pieces of the Earth's crust that bump and
grind like chunks of sea ice floating atop the ocean. The Earth's
surface is made up of about ten major tectonic plates and many more
minor ones.

Tremors are sustained vibrations that occur deep inside the Earth.

"Unlike the sharp jolt of an earthquake, tremors within Earth's crust
emerge slowly, rumbling for longer periods of time," explained Kaye
Shedlock, the program director for Earthscope at the National Science
Foundation.

EarthScope is a project investigating the structure and evolution of
the North American continent and the physical processes controlling
earthquakes and volcanic eruptions.

Normally, tremors are produced by the movement of magma in cracks and
other channels beneath volcanoes.

But there are no volcanoes located near the Earthscope San Andreas
Observatory at Depth (SAFOD) in Parkfield, California, where the new
tremors were recorded.

These are the first recordings of non-volcanic tremors deep inside the
Earth. They were recorded in deep boreholes that were drilled down to a
depth of about 2 miles.

Instead of volcanoes, the scientists think the subterranean rumblings
might be caused by processes similar to those that produce tremors near
the Cascadia Subduction Zone, an active fault that runs from
mid-Vancouver Island to northern California.

Those tremors are caused by the sliding of the undersea Juan de Fuca
tectonic plate beneath the North American plate.

The two plates making up the San Andreas Fault are different from those
in the Cascadia Subduction Zone, however, in that they slide past
another, much like two cars moving very slowly in opposite directions
on a freeway, in what scientists call a "slip."

"Right now we have no recorded slip associated with the tremors, so we
haven't been able to see the other part," Earthscope facility project
director Greg van der Vink told LiveScience.

Earthscope researchers hope to definitively link the two events by
installing instruments called laser strainmeters inside the borehole
which are capable of measuring slips as the tremors happen.


found at livescience.com

unquote:

found in the superiorpics celebrity forums at superiorpics.com

So about those planned missions to the moonship, um what sort of budget
would that require again?

.

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