|
Post by SA Hunter on Jul 17, 2014 22:44:54 GMT 10
|
|
|
Post by pheniox17 on Jul 17, 2014 23:07:25 GMT 10
its fiction... unless close meteor impact... Australia is protected against such events, by a continental shelf... best way it was explained to me was how a reef works (its more than pretty coral) it actually acts as a wave brake... then we have a mountain range around oz, high altitude coastline (in most areas) and in some another mountain range between the great dividing range and the sea.. so all factors aside, the gold coast has suffered a "tsunami" type of event (or my guess a cyclone cat 3 or higher) in geological history but sounds like a interesting book
|
|
overlord
Senior Member
Posts: 614
Likes: 720
|
Post by overlord on Jul 18, 2014 12:58:03 GMT 10
a 15 meter tsunami isn't that big and wouldn't have the power to wipe out a continent like Australia.
The 2011 Japan Tsunami was 30 feet high (about 10 meters) and it only affected a small portion of Japan.
|
|
sentinel
Senior Member
Posts: 463
Likes: 253
|
Post by sentinel on Jul 18, 2014 13:51:13 GMT 10
a 15 meter tsunami isn't that big and wouldn't have the power to wipe out a continent like Australia. The 2011 Japan Tsunami was 30 feet high (about 10 meters) and it only affected a small portion of Japan. I am on the coast. I can see water. I am doubtful if I'm 15mtrs above sea level.
After saying all that I do take Tsunamis extremely seriously. I know the GBR is a 'Buffer-zone' for us and has likely saved Qld more than once over the eons. But every natural or man made barrier has it's limitations. I regularly monitor for Tsunami threats and when 1 emerges - yes I have moved to higher ground. I would rather be safe than trying to swim in a blender type situation. I have even seen others take their kids out of the schools up here for the day when a warning comes out.
Think it was a couple o f warnings back a lot of people drove along the mangroves and tidal flats to reach one of the prime lookout locations - we watched them travel to there for a good 30min - I would think these would be the same people who venture out when the water recedes well out just prior a Tsunami hits.
(Perhaps it's a natural law of selection or a natural selection process - either way - high ground is good ground, preferably not across mangrove/tidal flats.)!!!
|
|
overlord
Senior Member
Posts: 614
Likes: 720
|
Post by overlord on Jul 18, 2014 14:20:37 GMT 10
High ground can also mean landslides.
I didn't mean to say that 15m tsunamis were nothing to worry about. I was just basing it on the concept of the book that a 15m tsunami would wipe out Australia.
|
|
sentinel
Senior Member
Posts: 463
Likes: 253
|
Post by sentinel on Jul 18, 2014 14:45:50 GMT 10
High ground can also mean landslides. I didn't mean to say that 15m tsunamis were nothing to worry about. I was just basing it on the concept of the book that a 15m tsunami would wipe out Australia. Yeah - I know. I was just pointing out (using your post) that we should not take any Tsunami warning lightly - I still don't trust the GBR as a be all end all - it's dying off so therefore it's compromised. If they dredge it then recent research indicates the silt flow can be disastrous (information only recently released - haven't had the opportunity to look into who funded this and who benefits - FYI - up in the Whitsunday region ATM dredging is a very, very touchy subject due to proposed expansion of a place called Abbott Point - if it gets full go ahead it will be the largest coal export terminal in the southern hemisphere - could even be the world - but not sure of the later) so the reef is looking to be coming to an end as our saviour.
Also here in Australia - we had not heard of Tsunamis really 20 years ago in general - this last decade has seen some large ones with devastating impacts - we now know what they are - at least I do. To be completely honest a continual wall of water that seems never ending would rattle the most confidant person to the core IMO. I hope I never need to face that challenge. (Yes in this situ I will admit my mortality).
|
|
|
Post by StepfordRenegade on Jul 18, 2014 15:51:24 GMT 10
I have heard/read somewhere (and I can't remember the source so can't verify it's authenticity) that if sea levels rise enough we will end up with another huge inland sea. Interesting to think of how that'd affect the remaining landscape.
|
|
overlord
Senior Member
Posts: 614
Likes: 720
|
Post by overlord on Jul 18, 2014 16:07:03 GMT 10
Actually here in the Philippines, we never had Tornados and quite recently, we have been having up to F1 to F2 class ones.
I remember getting into an argument with a buddy of a friend of mine when I mentioned that tornadoes were becoming a norm here (starting from small 20 foot high ones about 10 years ago to full height ones like a few months ago). He said I should get off my throne and seems I left my brain in the US since tornadoes only hit the US.
Quite recently, I bumped into him and my friend and I had fun the whole night showing him what an idiot he was hahaha
A GBR that is a preventive measure but since the weather patterns are changing and earthquakes are getting worse. These waves (tsunamis and stormsurges) will get bigger and bigger.
Take Japan for example, the buffer wall that they put up was already big and based on the largest tsunami they had experienced. They never expected a tsunami of that magnitude to hit them in 2011 and this had overrun their wall.
|
|
sentinel
Senior Member
Posts: 463
Likes: 253
|
Post by sentinel on Jul 18, 2014 16:17:14 GMT 10
I totally agree OL.
|
|
|
Post by pheniox17 on Jul 18, 2014 17:58:02 GMT 10
you guys really need to look at a deep sea map (the type with all the ground/undersea details) we need a unheard of, unthought of strength event to produce the energy to effect Australia... or something to happen directly off our coastline to produce a tsunami strong enough to effect Australia.. or the boxing day tsunami that wiped out Indonesia would have had some recordable effect in the coastal cities... just saying, don't dismiss the possibility but I just can't see it happening (but I still live a few 00 feet above sea level )
|
|
sentinel
Senior Member
Posts: 463
Likes: 253
|
Post by sentinel on Jul 18, 2014 18:51:20 GMT 10
There's been a bloody lot of shallow Earth Quakes and of reasonable size to the North and N-East of late - been a couple of premature Tsunami alerts that were not made public but did register concerns.(we never got to a watch stage but a couple of times). It doesn't need to be in our proximity to be a problem - the same ocean can be an issue. We have some real notable volcanoes around us and they can do anything at the end of the day.
|
|
AKM.
Senior Member
Posts: 146
Likes: 295
|
Post by AKM. on Jul 19, 2014 22:45:27 GMT 10
|
|
|
Post by SA Hunter on Jul 20, 2014 0:34:50 GMT 10
I can only speak from knowledge on the south coast here - I know we ( as a nation ) have tsunami warning beacons all over the place. If an event like this was to happen (15m wave) then the islands down south would be swamped and be a warning to us northeners. A 15m hit on southern Tas would have a big impact on the lower portion of the state, but I think it would also act as a buffer and take a lot off the wave heading to Victoria. Once it hit Vic waters, I don't see the wave continuing into Port Philip Bay. Maybe just a 2-3m surge in Melb. As to SA, a 15m wave would decimate the coast, but I could not see it getting to Mt Gambier (25km inland) and quite high up. Lower areas would be decimated. Portland Vic has a really high beach front, and would fare ok, bt not places like Pt Fairy, Warrnambool, and towns along the Great Ocean Road. Adelade would be spared as Kangaroo Island would take the brunt of the wave, and the gulf cities would have high surges, but nothing like 15m. Coastal towns like Pt Lincoln, Elliston, Streaky Bay, Ceduna would be hit hard, especially Ceduna & Elliston. The other towns, though on the coast, have land between them and the direction of the wave. Can't really comment on other coastal areas in Aust, as I am not really that familiar with them.
It does make for an interesting scenario though. Can't see it wiping us out, but it would decimate a lot of towns along the coast.
|
|
AKM.
Senior Member
Posts: 146
Likes: 295
|
Post by AKM. on Jul 20, 2014 16:18:24 GMT 10
Nor-east NSW/ SE Qld would cop a flogging. A good sustained surge across the coastal floodplains would see Murwillumbah, Lismore, Grafton, all damaged. Given our major arterials on the coast all cross the floodplains, if would make a mess of roads to further impede any relief efforts from the high ground to the west.
Not a nice scenario.
|
|