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Sumatra coastal cave records stunning tsunami history
BBC World News ^ | 11 December 2013 | Jonathan Amos

Posted on 12/11/2013 8:05:53 PM PST by LeoWindhorse

A cave on the northwestern coast of Sumatra holds a remarkable record of big tsunamis in the Indian Ocean.

The limestone opening, close to Banda Aceh, retains the sandy deposits washed ashore by huge, earthquake-induced waves over thousands of years.

Scientists are using the site to help determine the frequency of catastrophes like the event of 26 December 2004.

(Excerpt) Read more at bbc.co.uk ...


TOPICS: News/Current Events
KEYWORDS: aceh; atlantis; bandaaceh; catastrophism; cave; chevrons; creation; fenambosychevrons; godsgravesglyphs; greatflood; madagascar; megatsunami; megatsunamis; sumatra; tsunami; tsunamis
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remember 12/26/2004
1 posted on 12/11/2013 8:05:54 PM PST by LeoWindhorse
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To: LeoWindhorse

krakatoa (further East)


2 posted on 12/11/2013 8:07:49 PM PST by Cold Heart
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To: LeoWindhorse

I’m guessing that they happen more often than some folks would like to think.


3 posted on 12/11/2013 8:08:06 PM PST by ClearCase_guy
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To: ClearCase_guy

The seafloor around the Hawaiian islands are littered with the remains of massive ancient landslides that produce tsunamis.


4 posted on 12/11/2013 8:19:35 PM PST by cripplecreek (REMEMBER THE RIVER RAISIN!)
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To: LeoWindhorse

They are surprised? This place has earthquakes going off like a percolator.


5 posted on 12/11/2013 8:21:46 PM PST by Beowulf9
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To: LeoWindhorse

Living on a beach, I always have tsunamis in the back of my mind. It is my opinion that I am not so subject to a killer tsunami, as I am blocked from the open Pacific by other islands of the Philippines. I am, however, affected by earthquakes, less then 50 km from me. Since the big 8+ quake last month, we now have several small (mag 4 or less) almost every day. Very few are even noticed, and I have seen no surge in waves. The quakes are on Bohol, a large island that I can see from my beach.
If any FReeper is an authority on the subject, I would welcome any opinions.


6 posted on 12/11/2013 9:05:58 PM PST by AlexW
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To: LeoWindhorse

Pretty cool. Thanks for posting.


7 posted on 12/11/2013 9:08:38 PM PST by South40 (Liberalism is a Disease)
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To: AlexW

MOVE UP THE HILL a bit .....


8 posted on 12/11/2013 9:12:17 PM PST by LeoWindhorse
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To: cripplecreek

it is thought that these gigantic landslides might have produced Iminami’s ; super size locally generated wash backs caused by such collapses . The displaced ocean surge back to the shore and has left traces of marine debris to over 1000 ft. in elevation . A space object hit in the ocean would also produce such an iminami .


9 posted on 12/11/2013 9:14:48 PM PST by LeoWindhorse
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To: AlexW; SunkenCiv; no-to-illegals; All

Aftershocks, and for that matter foreshocks are very common with big earthquakes. I was in a 7.5 in Mexico City (1957?) and as I lay in bed, for weeks after I could feel little rumbles, sometimes several a day. I was in the Virginia earthquake last year. Was sitting on my bed and the wall oposite me started to vibrate and shake for about 15 seconds. At first I thought it might have been a distant bomb/explosion, but when no sound came thought earthquake. At least once in the next several days I felt a faint vibration while sitting, and once saw the surface of a glass of water start to shimmer. Didn’t feel anything then but an aftershock of 2.0 was reported later. Leave a bowl of water out if you want to track the minor ones.

Eight+ is plenty big, but another big one is possible. Google New Madrid Earthquakes, 1811-12 for more info. There were at least 3 8+ earthquakes and many other 7+ over a 4 or 5 month period.


10 posted on 12/11/2013 9:33:40 PM PST by gleeaikin
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To: LeoWindhorse

“MOVE UP THE HILL a bit”
_______________________________________
I like living on a beach, as it is still somewhat new for me.
My first 60+ years were hundreds of miles from any sea.
I can gain several hundred feet within 5 to 10 min if I have some advanced warning.
Oh, I did read up on ancient tsunamis. Some traversed the Atlantic all the way from Africa to North and South America.
They have had a huge impact on earth’s population and landscape.

By the way, during my first trip to Asia, 1999, I visited Phuket, Thailand, as well as the resort islands to the north that were later devastated by the Indian Ocean tsunami.


11 posted on 12/11/2013 9:45:57 PM PST by AlexW
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To: AlexW
If you see the sea retreating, run for high ground. Do not stop, do not pass Go, Do not collect $200.00.

Grab the family and run.

12 posted on 12/11/2013 9:50:44 PM PST by Harmless Teddy Bear (Proud Infidel, Gun Nut, Religious Fanatic and Freedom Fiend)
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To: AlexW

clear a nice wide ,direct path straight up hill . Have an ‘essentials ‘ grab&go pack . Know where you documents are and be sure and grab them . Acquire a pistol and ammo .


13 posted on 12/11/2013 9:52:02 PM PST by LeoWindhorse
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To: AlexW

“I visited Phuket, Thailand”

in the 2004 event , only certain sections of Phuket were affected , the open ocean sides . Inland sides hardly at all , a few meters up the hills not at all . Lower islands with built up low lying saddles got swept through and devastated the worst . The locals are still seeing the ghosts .
Maybe the PI will be like that in places now too .


14 posted on 12/11/2013 9:54:42 PM PST by LeoWindhorse
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To: gleeaikin

“I was in a 7.5 in Mexico City (1957?)”
____________________________________________
Our big quake in October was a 7.2 on October 15.
Even though I see Bohol from my beach, the damage here was not so severe, but broken and leaking water lines still plague the town, and the ancient Catholic church had damage that closed it. Nerves, however, were shaken. My porter and I were shoving a new case of beer under the fridge at the time. We both made a dash to the door and up to the beach road. Aftershocks continue almost daily.
http://www.phivolcs.dost.gov.ph/html/update_SOEPD/EQLatest.html
See those that say Bohol or Tagbilaran. I can see the glow from the lights of that city from my beach. There was a 3.1 just 4 hours ago.


15 posted on 12/11/2013 10:04:56 PM PST by AlexW
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To: LeoWindhorse

“in the 2004 event , only certain sections of Phuket were affected , the open ocean sides . Inland sides hardly at all”
____________________________________________
Yes, Phuket is a big area...barely an island, as a bridge connects it to the mainland on the north.
The heavy damage was at the seaside resorts along the Indian ocean coast lines.
Tsunamis have little impact on anything other then seashore towns/cities.


16 posted on 12/11/2013 10:12:38 PM PST by AlexW
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To: AlexW

in some cases there IS quite a bit of island ‘wrap-around’

I believe it takes deep offshore waters to do that and extensive wrapping tsunamis tend not to occur in the shallow SEA seas so much . Just a theory .
Every tsunami is different .


17 posted on 12/11/2013 10:30:19 PM PST by LeoWindhorse
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To: AlexW

” The heavy damage was at the seaside resorts along the Indian ocean coast lines.”

and along the Phang Nga province north of Phuket , where the waves went straight in . But not too far . Many were able to escape uphill . However ,if you couldn’t get up that hill you were toast


18 posted on 12/11/2013 10:34:01 PM PST by LeoWindhorse
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To: LeoWindhorse

“in some cases there IS quite a bit of island ‘wrap-around’”
_______________________________________________
Yes, the tsunami special that I saw on Natl.Geo ?
emphasized how they can wrap around an island.
That would NOT apply to most all of Cebu island.


19 posted on 12/11/2013 10:37:37 PM PST by AlexW
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To: AlexW

How much was Cebu affected by the typhoon ?


20 posted on 12/11/2013 10:43:16 PM PST by LeoWindhorse
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