Volcano

[robnisch]

volcano off oregon coast - Bing

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They have been watching this for some time, but there has been increased activity.
Kool, maybe we will have a new island some day.

Google Earth

earth.google.com

 

[DBT]

The prediction appears to be for this year.

 

[steve_bank]

It is not just that. Oregon and Washington coastal communities have built raised platforms for when when the big one hits and a tsunami hits the coast. When not if.

There is a major fault off the PNW coast. Cascadia subduction zone.

There is a line of volcanoes running from Washington through Oregon and California.

Axial is a shield volcano that sits on the Juan de Fuca Ridge (west of the Cascadia subduction zone), where two tectonic plates are spreading apart. “There's volcanic activity all up and down the ridge, and that's where new seafloor is created by eruptions,” OSU's Chadwick says.Mar 16, 2023

Cascadia Subduction Zone | Pacific Northwest Seismic Network

www.pnsn.org

 

[bilby]

The big problem with the Cascadia is that it is due for a megathrust quake, which is one of the most dangerous types for tsunami formation. The Tōhoku quake of 2011 was a megathrust quake - very shallow, and with a large lateral movement of the plates, causing a massive tsunami.

The last such quake in Cascadia was in 1700; The Japanese records from the time express surprise at a tsunami with no earthquake to cause it - the quake was, of course, on the far side of the Pacific, and not detected in Japan.

Quakes above magnitude 8 occur in that region every 300-900 years, so we are now into the start of the danger period; The longer it takes, the worse it will be when it goes. The smart money is on a magnitude 9 quake striking around 2350*. But it could happen tomorrow...

When the Cascadia goes again, so will a big chunk of anything below about 30m above sea level on the adjacent parts of the US West Coast.








* That's 2350CE, not ten to midnight tonight, in case anyone was getting nervous...

 

[robnisch]

The big problem with the Cascadia is that it is due for a megathrust quake, which is one of the most dangerous types for tsunami formation. The Tōhoku quake of 2011 was a megathrust quake - very shallow, and with a large lateral movement of the plates, causing a massive tsunami.

The last such quake in Cascadia was in 1700; The Japanese records from the time express surprise at a tsunami with no earthquake to cause it - the quake was, of course, on the far side of the Pacific, and not detected in Japan.

Quakes above magnitude 8 occur in that region every 300-900 years, so we are now into the start of the danger period; The longer it takes, the worse it will be when it goes. The smart money is on a magnitude 9 quake striking around 2350*. But it could happen tomorrow...

When the Cascadia goes again, so will a big chunk of anything below about 30m above sea level on the adjacent parts of the US West Coast.








* That's 2350CE, not ten to midnight tonight, in case anyone was getting nervous...

When you drive down 101 you can still see drowned forest from the 1700 quake.