२३ डिसेंबर, २०१८
"Krakatoa volcano erupts in Indonesia before 'causing tsunami'. Scientists believe the full moon strengthened the rush of water sent crashing into land after the eruption."
Caption to one of the many photographs at "More than 220 dead as tsunami strikes Indonesia: Giant wave wipes out pop concert killing two band members as hundreds are injured and villages destroyed after Krakatoa volcano erupts" (Daily Mail).
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High tide moves you closer to the ocean but otherwise doesn't affect tsunamis, I don't think. Lots of momentum reaching shallow water is what gives the height. All that momentum has to be carried by less and less water and that makes the wave big. Same thing that makes waves grow and break in general.
I blame Trump because he pulled out of the Paris accords
John Henry
Water? I thought it would be CO2.
The moon's mass does not increase from the amount of light reflected from it visible from the earth.
The idea is a full moon has to be opposite the sun so water sucked up and the earth sucked away from it. That overlooks that the tide is actually a fast-travelling wave rather than suckage, but the suckage powers the wave.
Seeing that band playing on stage be swept away by a wall of water brings to mind the days of Noah when they were all celebrating and giving in marriage until the last day.
Blogger Dust Bunny Queen said...
@ rhhardin
I believe what they are saying is that because the tide was high, meaning the water level was heaped higher due to the pull of the full moon, that there was more water to surge into the void left by the crater/eruption, which then caused a larger back surge which became a larger tsunami than would otherwise have occurred.
I have no idea if that is actually a valid hypothesis about the water. The phases of the moon have nothing to do with tides. It is the nearness of the moon to earth.
But. I think that is what they are trying to say.
Since I am talking about hypotheses, valid or not, GLOBAL WARMING! Let's suppose or hope as the Warmists probably wish, that Krakatoa explodes in an earth shattering boom as it did before and tons of ashes are expelled to blot out the sun. The resulting cooling of the earth and deaths of millions of people would just warm the cockles of their shrivel little hearts.
Maybe they will get their wish. A new ice age and the shriveling of human population all over the world.
Of course, they always assume that THEY will be spared.
drummer is missing
Some things are the same the world over. And I'm not referring to Keith Moon.
The phases of the moon have nothing to do with tides. It is the nearness of the moon to earth.
That what I thought, so I looked it up and ... we're wrong. The phase indicates alignment with the sun.
Ah....thank you Fernandistien.
I was mistaken....wrr-wrrrh-wrrrroooong. :-)
rhhardin said...
High tide moves you closer to the ocean but otherwise doesn't affect tsunamis, I don't think. Lots of momentum reaching shallow water is what gives the height. All that momentum has to be carried by less and less water and that makes the wave big. Same thing that makes waves grow and break in general.
The tsunami and the tide are essentially independent and additive. It looks like tides in the region run 3-5 ft. That means the high water of the tsunami reaches that much higher at high tide. Not insignificant, especially if the land is flat and relatively low.
I was wrong once before - I thought I had made a mistake, but I hadn't.
Annd then there are Mounts Toba and Tambora ...
This it Total LUNACY !!
Fritz is right on the physics, but wrong on the narrative. John Henry is right on the narrative: it’s gotta be Trump’s fault somehow!
The tide changes how far above sea level you are. The tsunami dynamics happen the same however, just delayed by the deeper water.
Ban assault volcanoes. Nobody needs a Krakatoa. There only purpose is to kill.
Hagar said...
The moon's mass does not increase from the amount of light reflected from it visible from the earth.
Right, but the moon's mass does rotate around the world (29days?) when it's in line with the sun (new moon and full moon), tides are highest(spring tide); when it's completely to the side (1st/4, 3rd/4moon), tides are leastest (neap tide)
Krakota, East of Java.
The tsunami and the tide are essentially independent and additive.
Well, not additive. The shifting shorewards of the tsunami wave growth history isn't an additive thing. I think there's probably a place offshore where the peak water level is lower at higher tide, owing to the tsunami not having grown yet in the deeper water.
The Kia Holiday Sale Ad was a nice touch to tsunami wiping out the band video. From Aaaaah aaaaah aaaaaah to Fa La La La La.
On a beach known for tidel waves?? (yea I know they are tsunamis.) No lookouts? Just dance and booze away? Indonesia is known for these things (remember that BIG one years ago... quarter of a million dead.) And what do they worry about.. Oh... the band members. The people watching that drowned are no big deal.
The oceans bulge on the opposite side with respect to the Moon, too, because the Earth itself is revolving around the Moon/Earth center of mass- this creates centrifugal force on the oceans opposite the Moon. That center of mass is roughly 3000 miles from the Earth's geometric center. At the full and new Moons, the Sun amplifies these opposite side tidal surges because the three bodies are aligned with each other.
Here is a representation of how the Earth/Moon system operates around their center of mass.
The earth is indifferent to the center of mass. It only feels gravity. Likewise the oceans. The inverse square force attracts nearer more than farther, so the near ocean, then the earth below it, then the far ocean, feel successively weaker forces from the moon.
The center of mass is a conservation thing which ignores differences of effects on the parts. An N-body system rotates about its center of mass, but the parts are all over the place.
Blogger Dave Begley said...Krakota, East of Java.
My brother and I played a mean game growing up: Whenever either of us would stub a toe, the other would respond: "Crack a toe-a, east of Java."
It always bothered me that Krakatoa is actually west of Central Java.
#nostalgia
CNN is claiming there is an effective news blackout from the USGS.gov on details because of the government shutdown.
Because Trump!
"Krakatoa east of Java" was a movie about an Earthquake in the late 19th Century.
I posted before reading the comments. Its seems others had the same thought.
I saw the movie as a kid on TV, I wish I could have seen in a theater.
The TV show "Time Tunnel" had that film beat by 2 years: Crack Of Doom (1966). That's where I first learned of all those cubic miles of rock thrown into the air.
I loved Time Tunnel back in the day.
I also remember the ridicule of the title "Krakota, East of Java".
From IMDb, “The producers learned of the geographic error (Krakatoa was west of Java in the Sundra Strait) only after all of the advertising and publicity materials had been prepared. It was deemed too costly to re-do these materials, and possibly delay the release, for the sake of simple geographic accuracy.”
Also referenced by The B52s.
My body's burnin' like a lava from a Maura Loa
My heart's crackin' like a Krakatoa
Ooh Krakatoa, east of Java, molten bodies, fiery lava
Fire, fire, burnin' bright
Turn on your love lava
Turn on your lava light
Fire, oh volcano, over you
Don't let your lava love turn to stone
Keep it burnin'
Keep it burnin' here at home
Well, for those curious, Krakatoa is actually WEST of Java. Go figure.
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