Tsunami Headed For Hawaii!!! - Page 3 - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > General Interest > General Discussion (sailing related)
 Not a Member? 


Reply
 
LinkBack Thread Tools
  #21  
Old 03-11-2011
Cruisingdad's Avatar
Best Looking MALE Mod
 
Join Date: Jul 2006
Location: Mobile Liveaboards
Posts: 9,894
Thanks: 3
Thanked 97 Times in 52 Posts
Rep Power: 10
Cruisingdad is a jewel in the rough Cruisingdad is a jewel in the rough Cruisingdad is a jewel in the rough
Quote:
Originally Posted by paradoxbox View Post
hello all, i'm living in tokyo japan. today was the scariest day of my life. but i can say i survived one of the most powerful earthquakes in history which is neato. i was sure i was going to die and i'm no coward, i've felt big quakes before but this was something else and i was just waiting for the intensity to increase and destroy my building.


anyway, the difference between a 7 foot swell that surfers ride and a 7 foot tsunami is that a tsunami rushes in and continues to rise, anything that is under that 7 feet will be submerged. the tsunami will travel inland for miles as long as the ground is under 7 feet above normal sea level.

in sendai, the area hit hardest by the quake and tsunami they were hit by a 32 foot tsunami.

don't be fooled by the images. there are hundreds or thousands of dead so far. but it's the middle of the night and we are still experiencing tsunamis from the aftershocks which have been incessant since 3pm when the big one hit.

i have friends up in sendai and aomori, i hope they are ok but can't reach them.

my building is still shaking as i type this from the aftershocks.
Good luck and all our wishes to you and everyone else that is going through this.

I agree about the loss of life. It will be terrible.

Brian
__________________
Sailnet Adminstrator & Moderator
Catalina 400 Technical Editor

2004 Catalina 400, Sea Mist IV (our boat, F/T Mobile Live Aboards in S FL and Keys primarily)
1987 Tayana Vancouver 42, Credendo Vides, (Mom and Pops boat, F/T Mobile Live Aboards in Puget Sound)

My Website:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Follow My Blog at:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Follow me on Facebook:

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #22  
Old 03-11-2011
imagine2frolic's Avatar
Senior Member
 
Join Date: Aug 2008
Posts: 1,831
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 6
imagine2frolic is on a distinguished road
Santa Cruz Ca. has seen some bummper car ACTION. A number of boats sunk, and running loose in the harbor..........i2f
__________________
20 MPH ain't fast unless, you do it in a 1000sq 3/2 house on 10foot waves
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


BORROWED, No single one of us is as smart as all of us!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #23  
Old 03-11-2011
Senior Member
 
Join Date: Sep 2006
Location: Texas
Posts: 526
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
CapnBilll is on a distinguished road
Quote:
Originally Posted by sawingknots View Post
i just talked to someone in the philippines,apparently it has already reached there too but no major damage.btw i've heard that if your in a boat offshore the effects are barely noticible
Right they are extremely long wavelength waves. I know a guy who was anchored in the indonesia during their big tsunami. He said when the water started receding from the harbor they all pulled anchor and headed to open water. Once they got out into deep water it was just a slight rise of a few meters , few hundred meters wide.

The danger isn't the height of the tsunami, it is the volume of water that is moving. In deep water the wavelength may be the depth the earthquake occured, (maybe a mile), as it reaches shallow water its velocity, (hundreds of meters per second), coupled by the change in depth as it reaches the continental shelf, that causes the damage. Think of a 6 foot tide added onto a 6 foot tide that occures in less than a minute. Like sloshing water in a large shallow bowl, compared to sloshing water in a bucket with steep sides.
__________________
The Sun has Risen on a New Day filled with the Promise of Adventure.
Reply With Quote Share with Facebook
  #24  
Old 03-11-2011
AdamLein's Avatar
Senior Member
 
Join Date: Nov 2007
Location: Coquitlam, BC
Posts: 1,866
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 7
AdamLein will become famous soon enough
Folks, we really appreciate the updates. However can you let us know where you found out whatever you're telling us? We are all concerned and want to make sure we're getting the best information.

Furthermore, can somebody clarify the link in the original post? If you click on one of the icons or the "report" links in the list, you get a list of times, locations, heights, and periods. However, the times don't have a date attached, and they're in UTC. For example, 1654 UTC, is that 0854 today or tomorrow on the west coast?
__________________
s/v Essorant
1972 Catalina 27
Reply With Quote Share with Facebook
  #25  
Old 03-11-2011
imagine2frolic's Avatar
Senior Member
 
Join Date: Aug 2008
Posts: 1,831
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 6
imagine2frolic is on a distinguished road
I was watching it on local tv as I was typing. It was rather chaotic. The left & right hands not knowing the other exists. People standing there scratching their heads, and these seemed to be employees?.......i2f
__________________
20 MPH ain't fast unless, you do it in a 1000sq 3/2 house on 10foot waves
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


BORROWED, No single one of us is as smart as all of us!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.



To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
  #26  
Old 03-11-2011
jrd22's Avatar
Courtney the Dancer
 
Join Date: Nov 2000
Location: San Juan Islands., WA, USA
Posts: 3,813
Thanks: 3
Thanked 14 Times in 14 Posts
Rep Power: 14
jrd22 will become famous soon enough
Adam- they were predicted to hit our area today between 0700-1200. The coast of WA got about 1' and I haven't heard anything new. I think the concern here is past. We haven't seen anything here in the SJ's.
__________________
John
SV Laurie Anne

1988 Brewer 40 Pilothouse

Reply With Quote Share with Facebook
  #27  
Old 03-11-2011
AdamLein's Avatar
Senior Member
 
Join Date: Nov 2007
Location: Coquitlam, BC
Posts: 1,866
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 7
AdamLein will become famous soon enough
Interesting... I wonder if it's more due to panic than wave action.

I'm getting conflicting reports. NOAA says Langara Island (northern BC) saw 0.52 meters (http://wcatwc.arh.noaa.gov/obs/obs.php), but the CBC reports that Emergency Management BC said there were no measurable changes (http://www.cbc.ca/news/canada/britis...nings-bc.html).

Parts of California are seeing almost 7 feet. Note that this is wave amplitude, not wave height, so in terms boaters are familiar with, that's almost 14 feet. Apparently Crescent City was hit pretty hard (http://www.latimes.com/news/nationwo...3043382.story).

You hear stories about tsunamis traveling up inlets. Does anybody know about the danger to protected areas like the Straight of Georgia and Puget Sound, San Francisco Bay, or the Columbia River?

edit: "hit hard" may have been an overstatement.
__________________
s/v Essorant
1972 Catalina 27
Reply With Quote Share with Facebook
  #28  
Old 03-11-2011
Faster's Avatar
Just another Moderator
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 14,604
Thanks: 67
Thanked 178 Times in 174 Posts
Rep Power: 10
Faster has a spectacular aura about Faster has a spectacular aura about Faster has a spectacular aura about
This is a real disaster for those in Japan - the images coming out now are mind-boggling. What a tragedy.

Adam, there's no warning for the inside waters (Juan de Fuca and Georgia Strait) but there's no doubt that to an open channel like the Alberni Inlet the amplified effects of a tidal wave can be considerable. Back in the '60s there was a big quake in Alaska and the resulting tsunami rolled into Port Alberni putting fishboats in the trees.

I've seen an old archival photo somewhere but can't track it down now.
__________________
Ron

1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
Reply With Quote Share with Facebook
  #29  
Old 03-11-2011
SlowButSteady's Avatar
Senior Slacker
 
Join Date: Feb 2010
Location: SoCal
Posts: 4,223
Thanks: 0
Thanked 17 Times in 15 Posts
Rep Power: 5
SlowButSteady is on a distinguished road
Quote:
Originally Posted by rmeador View Post
Perhaps you can explain to me how these 7' waves can be more dangerous than any other 7' waves? If it was 7' on the open ocean, then yeah that would be a big problem, but if it's 7' after it has compressed in shallow water, it shouldn't be any worse than any other 7' wave. The tsunami waves they're showing on the news look no different than normal waves (obviously I'm talking about the ones in hawaii. the video from japan is showing a much bigger, more destructive wave).
The difference is primarily in the wavelength. Wind waves and ground swell, which are just wind waves that were generated a long distance away, have wavelengths on the order of tens or hundreds of meters. In contrast, tsunamis generate waves with wavelengths that are tens of kilometers. That means two things: first, tsunamis travel extremely fast (hundreds of km/hr); and, second, there is a tremendous volume of water in each tsunami wave. Volume times velocity results in total wave energy.

When a wind wave (or groundswell) hits the beach the volume of water that gets thrown up onto the shore is fairly small and washes back into the ocean right away. When a tsunami hits the beach the volume of water keeps flowing landward for quite some time. Often, the land hasn't completely drained before the next wave in the sequence hit shore, compounding the effect. If subsequent waves in a tsunami sequence hit the water receding from previous waves, and/or of the topography is just "right", the waves will start to break, generating crests (and water velocities) much larger than the initial waves.

Fortunately, unlike wind-generated waves, tsunamis (because to their tremendous wavelengths) interact with the sea floor all the way across the ocean. This makes it possible for sensors to detect them long before they reach the coast, AND it means that they lose much more energy as they travel.
__________________
Never forget them. Do something to prevent it from happening again.
Charlotte Bacon, Daniel Barden, Rachel Davino, Olivia Josephine Gay, Ana M. Marquez-Greene, Dylan Hockley, Dawn Hochsprung, Madeleine F. Hsu, Catherine V. Hubbard, Chase Kowalski, Jesse Lewis, James Mattioli , Grace McDonnell, Anne Marie Murphy, Emilie Parker, Jack Pinto, Noah Pozner, Caroline Previdi, Jessica Rekos, Avielle Richman, Lauren Rousseau, Mary Sherlach, Victoria Soto, Benjamin Wheeler, Allison N. Wyatt
Reply With Quote Share with Facebook
  #30  
Old 03-11-2011
Cruisingdad's Avatar
Best Looking MALE Mod
 
Join Date: Jul 2006
Location: Mobile Liveaboards
Posts: 9,894
Thanks: 3
Thanked 97 Times in 52 Posts
Rep Power: 10
Cruisingdad is a jewel in the rough Cruisingdad is a jewel in the rough Cruisingdad is a jewel in the rough
Quote:
Originally Posted by rmeador View Post
Perhaps you can explain to me how these 7' waves can be more dangerous than any other 7' waves? If it was 7' on the open ocean, then yeah that would be a big problem, but if it's 7' after it has compressed in shallow water, it shouldn't be any worse than any other 7' wave. The tsunami waves they're showing on the news look no different than normal waves (obviously I'm talking about the ones in hawaii. the video from japan is showing a much bigger, more destructive wave).
I am no expert, but I will explain it as I understand it... happily corrected by anyone that knows better.

I think the term "wave height" is a misnomer. I think calling it a very rapid water rise would be a better term (much like a powerful hurricane, but instantaneous). So instead of a narrow wave that strikes and is gone, imagine the entire ocean rising X-feet and on top of that you get your wave action. Complicating it further is that the massive, rapid rise also creates its own waves.

So if you are in deep ocean water, a rapid water rise will not feel like anything and may not be noticeable. However, where the water becomes shallow, the energy will dispurse itself and on top of the water rise, you get your waves, etc. In areas where the energy can be spread out (a wide shoreline), the energy can be dispursed more evenly, like putting your hand flat on the sand when a wave passes by. However, if you cup your hand into a "V" into an approaching wave, the force, height, and speed increases exponentially. That is why some areas will see very little effect and others will see a large effect.

That is how I have looked at it. ANyone is free to correct me.

Brian
__________________
Sailnet Adminstrator & Moderator
Catalina 400 Technical Editor

2004 Catalina 400, Sea Mist IV (our boat, F/T Mobile Live Aboards in S FL and Keys primarily)
1987 Tayana Vancouver 42, Credendo Vides, (Mom and Pops boat, F/T Mobile Live Aboards in Puget Sound)

My Website:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Follow My Blog at:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


Follow me on Facebook:

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Samoa Tsunami photos yachtwork General Discussion (sailing related) 0 12-23-2009 07:06 PM
First-hand account of Tsunami... sailhog General Discussion (sailing related) 6 10-04-2009 11:51 AM
Tsunami tdw General Discussion (sailing related) 5 10-01-2009 02:24 AM
Tsunami tdw General Discussion (sailing related) 1 04-03-2007 10:04 PM
Tsunami /Yachts AMERICA88 General Discussion (sailing related) 6 01-10-2005 05:48 PM


All times are GMT -4. The time now is 12:26 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.