NOAA Video Shows Earthquake Tremors Propagating Across the World

Change the title. The video shows tsunami propagation. Not earthquakes.

It's too bad that the USGS continues to disseminate false information about the risks along the Cascadia fault system. Scientists have proven using tree rings and shorelines analyses that the average wave height of a rupture along the fault line is 38 feet.

And yet the USGS keeps downplaying the risks and reporting that waves around 15-20 feet should be used for planning escape routes, etc.

The real facts are not beginning to appear in Japan as cars have been pictured deposited onto the roofs of 4 story homes, boats with 35 foot waterlines being reported stranded onshore at 5 to 10 feet above sea level-which means that waves of at least 45 to 50 feet had to had carried them there! And this was 'only' a 9.0 quake that occured when 200 miles of fault ruptured.

In Cascadia, frequently the entire 800 miles ruptures at once and so it will result in a 9.2 to 9.7 quake with far more displacement of land and water as a result than the recent Japanese quake.

The USGS should be using a 50% safety factor when reporting risks and the real height they should be planning for along the western coast of America should be 100 feet--not 15 feet!

It's too bad the USGS is playing god and Americans citizens are all trusting their lives with this agency and not factoring in the data from private scientists.

As a result--tens of thousands will die as a result of their under playing the risks to placate businesses and homeowners worried more about their property values than the health of their occupants!

@pablo_max

"Change the title. The video shows tsunami propagation. Not earthquakes."

You do realize that a tsunami is an underwater earthquake right? Therefore the title "NOAA Video Shows Earthquake Tremors Propagating Across the World" is correct.

just like hurricane katrina all over again. The people see it coming from hundreds of miles away but are to damn stubborn to get out. Then when it hits, they are like where is our help (which in fact did take way took long of a responce time). People of America, get your asses out of their, for you own sake and your familys.

@rm02px

Sorry, tsunami is not an underwater earthquake. It is a large displacement of water usually caused by heaving up or sudden sinking of the plates during an earthquake, or underwater landslides that may or may not be caused by an earthquake. They can also be caused by large impacts in the water. The chart shows the "wave energy" of the water as it left the site of the earthquake in Japan.

@JimmyD

Are you an idiot? Not an underwater earthquake? Seriously? You do realize that the plate tectonics are underwater too right? And if you knew your geography, the plate tectonics that were shifted exist underwater. A tsunami can be caused by an underground explosion or a "submarine earthquake," hence "underwater earthquake." How do you think the water is displaced in the first place? Hence the title, "NOAA Video Shows Earthquake Tremors Propagating Across the World." If I were wrong, the title of this article would be wrong too. LMFAO, "sorry, tsunami is not an underground earthquake." You sir are a idiot if you believe that.

@JimmyD
Typo

*Underwater earthquake,...* you get the just of it. In case you try to fuck with my linguistics.

@JimmyD

Found a few quotes, go google it asshole.

1) A tsunami is a series of large waves generated by an abrupt movement on the ocean floor that can result from an earthquake, an underwater landslide, a volcanic eruption or - very rarely - a large meteorite strike. However, powerful undersea earthquakes are responsible for most tsunamis

2)Tsunamis can be triggered off by an underwater earthquake, a volcanic eruption, a sub-marine rockslide, or, more rarely, by an asteroid or meteorite crashing into the water from space.

3)Most tsunamis are caused by underwater earthquakes, but not all underwater earthquakes cause tsunamis.

4)(CNN) -- The world is much better prepared today for dealing with the far-away effects of a tsunami, but the severe underwater earthquake Friday would have given residents of nearby northeastern Japan only minutes to respond to a destructive wave of water, according to civil engineering expert Philip Liu.

5)The tsunami caused by the 8.9 earthquake off the eastern shores of Japan Friday was triggered at a site called a subduction zone, where one tectonic plate is slowly pushing beneath another. These powerful waves, which are caused by underwater earthquakes or volcanoes, can travel across the sea at 800 km/h at ripple-height, then pile up into powerful towers of water when they hit land.

@ rm02px

You may want to hit up an encyclopedia or something before you decide to call someone an idiot. A tsunami is not synonymous with an underwater earthquake.

Underwater Earthquake to Tsunami
Lots of Rain to Mudslide

They have a causal relationship that's about it.

@ Moquah Hunter

I really hope that was an attempt at sarcasm.

"The people see it coming from hundreds of miles away but are to damn stubborn to get out."

Don't know about you but I can't see hundreds of miles away and as far as I know they can't predict much about earthquakes yet. These people were prepared as they could be for the quake but they couldn't 'see' the tsunami coming.

-Fail

@Convictus

One word: dyslexia.

@ rm02px

One word: Troll.

Dammit Jim i'm an engineer not an english projessor.

Seriously though I don't see anything wrong with my post.

@Convictus

According to Encyclopedia Britannica: tsunami, also called seismic sea wave or tidal wave, catastrophic ocean wave, usually caused by a submarine earthquake, by an underwater or coastal landslide, or by the eruption of a volcano.

Hence "submarine earthquake," or "underwater earthquake." For submarine means "under the sea" or a vessel. IDIOT!

@Convictus

A troll is someone who posts inflammatory, extraneous, or off-topic messages in an online community. How are my posts off topic? I corrected someone, for they lacked the sufficient knowledge, now I make you look like an idiot and all you can do is call me a troll? Your logic is schizophrenic and you're clearly dyslexic, incapable of reading and understanding words.

@ rm02px

The original comment by Pablo_Max

"Change the title. The video shows tsunami propagation. Not earthquakes."

Did you watch the video?

-rm02px's assumption:

"You do realize that a tsunami is an underwater earthquake right? Therefore the title "NOAA Video Shows Earthquake Tremors Propagating Across the World" is correct."

I'm saying your incorrect. The earthquake generates the waves. My information is based off in part of the following quote (wiki).

"A tsunami (Japanese: 津波, lit. "harbor wave";[1] Japanese pronunciation: [tsɯnami]; English pronunciation: /tsuːˈnɑːmi/ tsoo-NAH-mee or /suːˈnɑːmi/ soo-NAH-mee[2]) is a series of water waves (also called a tsunami wave train[3]) caused by the displacement of a large volume of a body of water, usually an ocean, though it can occur in large lakes. Tsunamis are a frequent occurrence in Japan; approximately 195 events have been recorded.[4] Owing to the immense volumes of water and the high energy involved, tsunamis can devastate coastal regions.

Earthquakes, volcanic eruptions and other underwater explosions (including detonations of underwater nuclear devices), landslides and other mass movements, meteorite ocean impacts or similar impact events, and other disturbances above or below water all have the potential to generate a tsunami."

-..."Potential to generate a tsunami"

If an underwater earthquake is a tsunami how can it generate one?

Don't call me an idiot please sir. Thank you

@Convictus

You're an idiot. Simple. If you cannot realize that an "underwater earthquake" caused the displacement of water then you sir are truly an idiot.

I quoted a series of articles, one being a CNN article, where the term "underwater earthquake" was used to identify the cause. If you look closely at the map underneath the video you will clearly see several red marked indicators of "earthquakes" that occurred under the sea, that resulted in the displacement of ocean waves, which than generated the disturbances of water causing the tsunami. Everything you quoted is a regurgitation of what I said in my previous posts. You're clearly dyslexic and to reiterate, you're a fucking idiot too!

@rm02px

LOL Whatever man you are totally missing the point. Its okay though I remember having my first beer too.

-Goodbye

@Convictus

A typical 'troll" response. Off topic and irrelevant. Regardless of your schizophrenic rhetoric, you're still dyslexic. Go drink your beer and good riddance. Maybe next time you'll actually understand the words people write, oppose to spewing out grade 8 geography quotes.

@rm02px

Your daddy didn't hug you enough as a child did he? Or maybe he like to hug you too much........ Either way you have anger issues.

Also it is pretty screwed up using psychological maladies as put downs. Real people suffer greatly with these and to use them in this way is demeaning to them.

I weep for your progeny.

Ps. I think they make medicine for your rectacranial inversion don't they?

@rm02px

I have a degree in geology and work in the geosciences. Tsunamis are not earthquakes. Period. Convictus is right.

To quote you, "According to Encyclopedia Britannica: tsunami, also called seismic sea wave or tidal wave, catastrophic ocean wave, usually caused by a submarine earthquake, by an underwater or coastal landslide, or by the eruption of a volcano."

The key in your definition is "usually CAUSED BY a submarine earthquake". "Caused by" does not mean "is". Light from a light bulb is not a light bulb.