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#1111928 - 29/06/2012 17:03 Tsunami
Lindsay Knowles Offline
Moderator

Registered: 18/01/2003
Posts: 3939
Loc: Pakenham Victoria's Storm Capi...
Please post all reports on Tsunamis here

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#1123219 - 27/08/2012 16:06 Re: Tsunami [Re: Lindsay Knowles]
Arnost Offline
Weatherzone Addict

Registered: 10/02/2007
Posts: 3908
A TSUNAMI WARNING IS IN EFFECT FOR

COSTA RICA / NICARAGUA / EL SALVADOR / HONDURAS / GUATEMALA /
PANAMA / MEXICO



Quote:
AN EARTHQUAKE HAS OCCURRED WITH THESE PRELIMINARY PARAMETERS

ORIGIN TIME - 0437Z 27 AUG 2012
COORDINATES - 12.7 NORTH 88.5 WEST
DEPTH - 54 KM
LOCATION - OFF COAST OF CENTRAL AMERICA
MAGNITUDE - 7.3

EVALUATION

IT IS NOT KNOWN THAT A TSUNAMI WAS GENERATED. THIS WARNING IS
BASED ONLY ON THE EARTHQUAKE EVALUATION. AN EARTHQUAKE OF THIS
SIZE HAS THE POTENTIAL TO GENERATE A DESTRUCTIVE TSUNAMI THAT CAN
STRIKE COASTLINES IN THE REGION NEAR THE EPICENTER WITHIN MINUTES
TO HOURS. AUTHORITIES IN THE REGION SHOULD TAKE APPROPRIATE
ACTION IN RESPONSE TO THIS POSSIBILITY. THIS CENTER WILL CONTINUE
TO MONITOR SEA LEVEL GAUGES NEAREST THE REGION AND REPORT IF ANY
TSUNAMI WAVE ACTIVITY IS OBSERVED. THE WARNING WILL NOT EXPAND
TO OTHER AREAS OF THE PACIFIC UNLESS ADDITIONAL DATA ARE RECEIVED
TO WARRANT SUCH AN EXPANSION.


http://ptwc.weather.gov/ptwc/?region=1&id=pacific.TSUPAC.2012.08.27.0542
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#1123222 - 27/08/2012 16:30 Re: Tsunami [Re: Arnost]
duckweather Offline
Weatherzone Addict

Registered: 20/12/2010
Posts: 2578
Loc: Wantirna, Vic
A buoy has registered a change in water height, but there is no further confirmation of a tsunami having been generated at this point.
There is no current 'watch', but the warning is an advisory one at this stage.
But can't help but feel that there must be some sea 'reaction' (of what changes I don't know) to a quake(s) of this size on the plate boundaries.
Let's hope it is minimal.

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#1123237 - 27/08/2012 18:01 Re: Tsunami [Re: duckweather]
SBT Offline
Meteorological Motor Mouth

Registered: 07/02/2007
Posts: 14156
Loc: Townsville Dry Tropics
The quake occured 54klm underground. Chances are that there hasn't been any (undersea) land surface disruption of a vertical nature so quite possibly no tsunmai can have occured. The quake could have been a horizontal slip and if this is teh case there is zero chance of a tsunmai being created.
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#1123376 - 28/08/2012 13:52 Re: Tsunami [Re: SBT]
duckweather Offline
Weatherzone Addict

Registered: 20/12/2010
Posts: 2578
Loc: Wantirna, Vic
The buoy picked up on a sea level drop within seconds and a 10cm tsunami was generated. Luckily that's all it produced given the nature of the movement. If it had have been a different movement (horizontal) - the nature/size of the tsunami may have been not so good.

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#1123392 - 28/08/2012 14:43 Re: Tsunami [Re: duckweather]
LQQKN Offline
Weatherzone Addict

Registered: 24/08/2007
Posts: 1438
Loc: , tweed coast
lucky this time. tho with all the activity wouldnt wanna be in LA at the moment. might be some fun surf from the activity around today,


Edited by LQQKN (28/08/2012 14:44)

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#1124319 - 01/09/2012 16:38 Re: Tsunami [Re: LQQKN]
duckweather Offline
Weatherzone Addict

Registered: 20/12/2010
Posts: 2578
Loc: Wantirna, Vic
This a short, but concise report on the Philippines quakes so far.
Tsunami after quake off Philippines

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#1124359 - 01/09/2012 20:42 Re: Tsunami [Re: duckweather]
SBT Offline
Meteorological Motor Mouth

Registered: 07/02/2007
Posts: 14156
Loc: Townsville Dry Tropics
Subluction (sudden releases of pressure due to Vertical movement) causes Tsunamis to form, along with underwater landslides, meteor impacts etc.

Horizontal movements can not cause tsunamis - it is physically impossible to happen that way - see http://www.smh.com.au/environment/why-earthquake-did-not-cause-a-tsunami-20120412-1wvik.html for clarification.

Basic geology.
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202mm April 2017
Best 156mm 19/5/17
Oct 143mm
2017 Total 836mm
2016 Total 649mm
2015 Total 375mm
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2013 Total 715mm







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#1124361 - 01/09/2012 21:14 Re: Tsunami [Re: SBT]
duckweather Offline
Weatherzone Addict

Registered: 20/12/2010
Posts: 2578
Loc: Wantirna, Vic
Hi Mike.
Apparently though, Renato Solidum, chief of the Philippine Institute of Volcanology and Seismology, reported a tsunami of 20 inches in height came ashore on Siargao Island. A buoy in close proximaty, registered an almost immediate drop in water height; faster than is usually recorded for the expected time period.
I couldn't help but feel and imagine that such a large quake, though not the 'normal' major tsunami producing 'type', would have some effect on the local water levels.
Cheers, Duck wink

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#1125118 - 06/09/2012 01:43 Re: Tsunami [Re: duckweather]
Ken Kato Offline
Weatherzone Addict

Registered: 05/03/2012
Posts: 4680
Major quake occurred with epicentre in Costa Rica in Central America (south of Mexico) at 12:42am AEST. Magnitude detected by USGS was 7.6 (revised down from the preliminary 7.9) with depth of 46km.

The Joint Australian Tsunami Warning Centre has issued a No Threat bulletin for Australia at time of writing this.

However, for areas close to the quake, the Pacific Tsunami Warning Centre has them currently under a tsunami warning as follows:

TSUNAMI BULLETIN NUMBER 001PACIFIC TSUNAMI WARNING CENTER/NOAA/NWSISSUED AT 1450Z 05 SEP 2012

THIS BULLETIN APPLIES TO AREAS WITHIN AND BORDERING THE PACIFIC OCEAN AND ADJACENT SEAS...EXCEPT ALASKA...BRITISH COLUMBIA...WASHINGTON...OREGON AND CALIFORNIA. ... A TSUNAMI WARNING AND WATCH ARE IN EFFECT ... A TSUNAMI WARNING IS IN EFFECT FOR COSTA RICA / PANAMA / NICARAGUA / EL SALVADOR / HONDURAS /MEXICO / COLOMBIA / ECUADOR / GUATEMALA / PERU

A TSUNAMI WATCH IS IN EFFECT FOR CHILE

It's unknown yet whether or not tsunami was caused but will know soon when readings from tidal gauges and the DART tsunami detection buoys come in. Here's a map showing possible max tsunami wave heights (in metres) generated by JRC modeling:


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#1129840 - 01/10/2012 11:03 Re: Tsunami [Re: Ken Kato]
Mathew Offline
Meteorological Motor Mouth

Registered: 11/01/2006
Posts: 6765
Loc: Townsville, Queensland
No Tsunami Watch or Warning for the Queensland coast line as of let for the 7.3 Earthquake just happen this morning.

http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/us2012gdap.php


Edited by mat (01/10/2012 11:08)
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#1136000 - 28/10/2012 15:09 Re: Tsunami [Re: Mathew]
Ken Kato Offline
Weatherzone Addict

Registered: 05/03/2012
Posts: 4680
Magnitude 7.7 quake off the SW coast of British Columbia in Canada at 2:04pm AEDT with depth of 17.5km. There's a local tsunami warning/advisory in effect but no Pacific-wide warning, nor any threat to Australia at this stage.

Output from JRC's tsunami model showing suggested wave heights to 3hrs 40mins from quake time (the model is still running):


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#1136019 - 28/10/2012 17:59 Re: Tsunami [Re: Mathew]
Eclectic Offline
Cloud Gazer

Registered: 17/01/2011
Posts: 39
Loc: Carina, Brisbane, Qld
Tsunami warning issued in Hawaii- expected 10.20 pm Hawaii time. Live stream from Kohn2 Hawaii- http://www.khon2.com/content/mediacenter/livestream.aspx

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#1136020 - 28/10/2012 18:04 Re: Tsunami [Re: Eclectic]
Noname Offline
Weatherzone Addict

Registered: 28/01/2011
Posts: 2104
How funny they go about. Stupid media beat up. Evacuation really? There no such waves has reported more than 23cm! Hawaii is no Salt Lake, whereas it is below sea level....

Facebook gone berserk about this, people panicking and stuff about this tsunami. I told them, in honest criteria there is no danger. 20cm wave would been lower than 10cm by reaching Hawaii. Media has it estimate of 6feet hitting the windward side after 10pm tonight, 6feet really? Thats so much bigger, even five times higher than the height of the waves been recorded in BC. Hawaii is over 4500miles away.....
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#1136023 - 28/10/2012 18:15 Re: Tsunami [Re: Noname]
Noname Offline
Weatherzone Addict

Registered: 28/01/2011
Posts: 2104
EDIT: People aren't being careful about the media of this event. That website link you gave us, is one of them causing panic in preparation. In tsunami warning, there is NO such height estimated for impact for Hawaii. Since there are records of height (23cm maximum) off BC coast in Canada. This case, it will be virtually impossible to generate a wave that far travel to Hawaii.
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#1136024 - 28/10/2012 18:21 Re: Tsunami [Re: Noname]
crikey Offline
Weatherzone Addict

Registered: 01/02/2011
Posts: 2586
Loc: Tweed Heads

Viewers are telling us that the warning sirens are going off in Hilo now #HITsunami
half a minute ago
https://twitter.com/intent/user?screen_name=KHONnews
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#1136025 - 28/10/2012 18:24 Re: Tsunami [Re: crikey]
Noname Offline
Weatherzone Addict

Registered: 28/01/2011
Posts: 2104
Media bashing yet again.

30cm waves is dangerous for HI? CA has it 33cm height recorded. How possible HI to get above that when it is over 4000miles away? Stupid poorly management. My professor in disaster studies will be not happy about this result. People are wasting time.
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#1136028 - 28/10/2012 18:54 Re: Tsunami [Re: Noname]
duckweather Offline
Weatherzone Addict

Registered: 20/12/2010
Posts: 2578
Loc: Wantirna, Vic
The Queen Charlotte Islands are still copping some serious movement.
The direction of the wave energy shown on the charts Ken has put up in the above posts seems a bit concerning for Hawaii.
When the main quake hit, I had a quick look at the buoys in Hawaii and Canada both responded at about the same time. So maybe the impact of the Canada quake at that moment was affecting the Hawaii buoy too...?
Time will tell how Hawaii is affected..I think their warnings for their communities are reasonable and relevant just in case Hawaii is to be impacted in some way...I know I would duck up a nearby hill just in case..to be safe...

KHONnews 6-7 ft wave possible for Kahului, Maui, 3-4 ft for Oahu, possible 4 ft for Hilo #HITsunami


Edited by duckweather (28/10/2012 18:58)
Edit Reason: extra

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#1136030 - 28/10/2012 19:06 Re: Tsunami [Re: duckweather]
Mick10 Offline
Weatherzone Moderator

Registered: 02/11/2001
Posts: 24822
Loc: Kirwan, Townsville - NQld.
friend in hawaii is reporting the sirens going off non stop.
lead article on 7news just now showing widespread traffic problems across the islands.
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#1136032 - 28/10/2012 19:10 Re: Tsunami [Re: Mick10]
Moonstruck Offline
Weather Freak

Registered: 30/12/2010
Posts: 755
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