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Under California: An ancient tectonic plate

By Guest PostMarch 19, 2013Scienceancient tectonic plate, baja peninsula, brian savage, brown university, california, california coast, central california, christina rau, columbia university, donald forsyth, farallon oceanic plate, geologist, high velocity anomaly, isabella anomaly, james gaherty, lithospheric plate, Mexico, nina carriero, north american plate, pacific, rhode island, san andreas fault, seismic tomography data, seismic tomography signature, sierra nevada mountains, under california, university, university of oregon, west coast, yun wang

The Isabella anomaly — indications of a large mass of cool, dehydrated material about 100 kilometers beneath central California — is in fact a surviving slab of the Farallon oceanic plate. Most of the Farallon plate was driven deep into the Earth’s mantle as the Pacific and North American plates began converging about 100 million years ago, eventually coming together to form the San Andreas fault.

PROVIDENCE, R.I. [Brown University] — Large chunks of an ancient tectonic plate that slid under North America millions of years ago are still present under parts of central California and Mexico, according to new research led by Brown University geophysicists. (more…)

Web Tool, Phone App Pinpoint Tsunami Dangers, Quick Getaway Routes

By Guest PostMarch 23, 2012Environment, Technologyalaska, android, cascadia subduction zone, flood, iTunes, jan newton, Japan, jonathan allan, magnitude, megathrust earthquake, mynanoos, oregon, oregon coasts, pacific northwest, phone application, quake, smartphone app, tohoku, tool, tribal oral histories, tsunami, tsunami inundation, tsunami warning center, tsunami warnings, tsunamievac n, Washington, west coast, zones

A new online portal and smartphone app lets Washington and Oregon residents enter the addresses of their homes, schools, workplaces or kids’ day care centers to check if they’re in harm’s way should a tsunami hit.

Materials available via the tool or phone application can be used to map out evacuation routes for you, your family, employees or students so everyone is ready when danger arises. There’s a way to create a free account so users can map and save multiple locations and evacuation routes in one place. (more…)

After a Three-Decade Hiatus, Sea-Level Rise May Return to the West Coast

By Guest PostMay 4, 2011Environmentcoastal sea level, pacific decadal oscillation, warm phase, west coast

WASHINGTON — The West Coast of North America has caught a break that has left sea level in the eastern North Pacific Ocean steady during the last few decades, but there is evidence that a change in wind patterns may be occurring that could cause coastal sea-level rise to accelerate beginning this decade. (more…)

Tag Archives: west coast

Under California: An ancient tectonic plate

Web Tool, Phone App Pinpoint Tsunami Dangers, Quick Getaway Routes

After a Three-Decade Hiatus, Sea-Level Rise May Return to the West Coast