2:30 something last night, MyShake yelled at me "EARTHQUAKE EARTHQUAKE EARTHQUAKE" and the little indicator told me it was a 6.3 and I should DROP! COVER! HOLD ON!
but we were 200 miles from the epicenter, so didn't feel a thing. And I'd forgotten I'd installed the app. But, it seems to work.
Here's a little information about the Mendocino Triple Junction (MTJ) area that just spawned this earthquake. One reason we are one of most seismically active areas in US.
It was a significant event that caused large accelerations in the area of Ferndale (reported 0.9 g - If an acceleration exceeds 1 g that means it is flying). There doesn't seem to be a lot of structural damage except for Fernbridge that crosses the Eel River and connects Ferndale to the rest of the world. It is an amazing bridge https://en.wikipedia.org/wiki/... so I'm hoping it is a settlement/liquefaction problem with the approaches and not the main span. A great source of information is https://earthjay.com (he is currently traveling to the area but will have information within the next 24 hours). It appears to be an earthquake in the oceanic Gorda plate which is subducting beneath North America. It is a common earthquake source. We had a similar event exactly one year prior to this one (just a coincidence).
It was a significant event that caused large accelerations in the area of Ferndale (reported 0.9 g - If an acceleration exceeds 1 g that means it is flying). There doesn't seem to be a lot of structural damage except for Fernbridge that crosses the Eel River and connects Ferndale to the rest of the world. It is an amazing bridge https://en.wikipedia.org/wiki/... so I'm hoping it is a settlement/liquefaction problem with the approaches and not the main span. A great source of information is https://earthjay.com (he is currently traveling to the area but will have information within the next 24 hours). It appears to be an earthquake in the oceanic Gorda plate which is subducting beneath North America. It is a common earthquake source. We had a similar event exactly one year prior to this one (just a coincidence).
So you leave the door open to keep it well ventilated, then when the Tsunami is coming you discover that there is a nest of poisonous snakes in there...
If I am not mistaken, you could see the transition in wave form there. Geomorph can tell which ones.. I'm guessing the first sloshing was secondary and the final side to side motion was caused by love waves. (yes you read correctly).
Funny I hadnât seen this thread earlier. It can be really difficult to determine the wave forms traveling through small bodies of water in buildings since there is so much interference (constructive and destructive) happening. Also, the building is an oscillator that is responding to ground motion based on its own peculiar characteristics (how it is attached to the ground, how tall it is, orientation, etc.). So, with all of those caveats, it looks like the video misses the p-wave (makes sense seeing they had time to grab the camera and turn it on), the first part could be an s-wave and the second set could be surface waves (especially when they start rotating). Pretty cool.
We saw those when visiting somewhere. They looked so depressing, but I guess maybe that’s better than death? Maybe.
So you leave the door open to keep it well ventilated, then when the Tsunami is coming you discover that there is a nest of poisonous snakes in there...
yeah, but looking at it again, the distinction is not that clear. I think it was just me seeing patterns where none exist. At first I thought the water was going back and forth and then side to side but it's doing both movements in both phases.
And the quake was quite deep so it would if anything be p and s waves and not rayleigh or love waves, if I understand them correctly, which is unlikely.
However, there were two phases, which could be due to reflection, i.e. two sets of s-waves offset from each other. dunno.
You have a symmetrically asymmetrical tub with the ledge at the one end. It causes a wave all by itself just as a reef on the ocean floor does. Then it rises, breaks, hits the back end for a backwash wave of a type that would not exist if the bottom of the tub was the same throughout. And what is the alignment of the tub in relation to the shock wave, perpendicular or an oblique angle, etc. And was the shock wave itself uniform or distorted ?
What you do have is total chaos in regards to the waves present. This situation is very similar to what we have up here in the Great Lakes, (especially Erie which is very shallow with an average depth of just 55 feet) with swells coming from multiple directions all at the same time, especially in storms. What you saw in the tub is very similar to the wave action that took the Edmund Fitzgerald as it tried to approach and pass through a narrow strait in a brutal storm. Waves reflecting off the banks interacting with wind driven waves from the storm. IIRC the final analysis was waves coming from 5 different directions all at once. And the bow and stern sitting atop the respective crests of two swells leaving the length of the hull out of the water and the weight unsupported a tad too long causing it to snap in half in the middle. Storm waves on the GL's can get up to 50 feet at times, and are very irregular with the short fetches.
We saw those when visiting somewhere. They looked so depressing, but I guess maybe thatâs better than death? Maybe.
So you leave the door open to keep it well ventilated, then when the Tsunami is coming you discover that there is a nest of poisonous snakes in there...
If I am not mistaken, you could see the transition in wave form there. Geomorph can tell which ones.. I'm guessing the first sloshing was secondary and the final side to side motion was caused by love waves. (yes you read correctly).
like quake p and s waves?
yeah, but looking at it again, the distinction is not that clear. I think it was just me seeing patterns where none exist. At first I thought the water was going back and forth and then side to side but it's doing both movements in both phases.
And the quake was quite deep so it would if anything be p and s waves and not rayleigh or love waves, if I understand them correctly, which is unlikely.
However, there were two phases, which could be due to reflection, i.e. two sets of s-waves offset from each other. dunno.
I reckon there is a huge need out there for zorbs with some kind of rapid inflation device for people in at risk areas to have stashed at home that they could climb into in an emergency. There are lots of places on the planet exposed to a tsunami risk and no high ground around. And surely, they can't be that costly to manufacture. If they were made of resilient plastic, they would withstand most scenarios.
If I am not mistaken, you could see the transition in wave form there. Geomorph can tell which ones.. I'm guessing the first sloshing was secondary and the final side to side motion was caused by love waves. (yes you read correctly).
I reckon there is a huge need out there for zorbs with some kind of rapid inflation device for people in at risk areas to have stashed at home that they could climb into in an emergency. There are lots of places on the planet exposed to a tsunami risk and no high ground around. And surely, they can't be that costly to manufacture. If they were made of resilient plastic, they would withstand most scenarios.
I remember watching the other Fukushima tsunami on TV live with my family. We watched people running towards overpasses and other high ground - and then it dawned on us that they weren't fast enough. And they were gonna drown right now while we watched.
Easily one of the more disturbing things in recent memory.
I reckon there is a huge need out there for zorbs with some kind of rapid inflation device for people in at risk areas to have stashed at home that they could climb into in an emergency. There are lots of places on the planet exposed to a tsunami risk and no high ground around. And surely, they can't be that costly to manufacture. If they were made of resilient plastic, they would withstand most scenarios.
