Earthquakes in the Nenana Basin region of Interior Alaska last longer and feel much stronger than a quake of comparable magnitude would in a non-basin region, due to the behavior of the seismic waves once they reach the area.
Earth Sciences
Jan 26, 2023
0
41
On the surface, subduction zones manifest as oceanic trenches, the deepest of which is the Mariana Trench in the Pacific Ocean. One notable feature of many trenches is their outer rise, a shallow bulge on the outskirts of ...
Earth Sciences
Aug 10, 2022
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7
A novel three-dimensional model of the fluid stored deep in Earth's crust along the Cascadia Subduction Zone provides new insight into how the accumulation and release of those fluids may influence seismic activity in the ...
Earth Sciences
Jul 14, 2022
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247
We are underway on our 48-day long expedition offshore of the west coast of Mexico near Acapulco, where the young Cocos oceanic plate dives beneath the North American plate. Most of this subduction zone, often referred to ...
Earth Sciences
Jun 8, 2022
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6
The 2004 Sumatra earthquake generated one of the most destructive tsunamis ever recorded, with 100-foot waves that killed nearly 230,000 and resulted in an estimated $10 billion in damage. It also ushered in a new understanding ...
Earth Sciences
May 26, 2022
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88
The 2016 Kumamoto earthquakes shocked inhabitants of the western island of Kyushu, causing hundreds of casualties and serious damage to vital infrastructure. The epicenter of the quake was traced to the Futagawa fault in a ...
Earth Sciences
Apr 22, 2022
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10
Let's take a journey into the depths of the Earth, down through the crust and mantle nearly to the core. We'll use seismic waves to show the way, since they echo through the planet following an earthquake and reveal its internal ...
Earth Sciences
Dec 30, 2021
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1829
Subduction zones, where a slab of oceanic plate is pushed beneath another tectonic plate down into the mantle, cause the world's largest and most destructive earthquakes. Reconstructing the geometry and stress conditions ...
Earth Sciences
Dec 27, 2021
2
111
In modern subduction zones—regions around the world that have one tectonic plate sliding past another—one area can act like molasses for seismic waves. These anomalous areas are called low-velocity zones, or LVZs. In ...
Earth Sciences
Nov 9, 2021
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103
The seismic discontinuity that occurs at an average depth of 647-654 km, usually called the 660 km seismic discontinuity, is the boundary between the transition zone and the lower mantle. It is considered to be caused by ...
Earth Sciences
Jun 3, 2021
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4
