Kilauea a'a Shield Flow June 1, 2010
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- čas přidán 2. 06. 2010
- Most of the flow from the TEB vent on the East Rift Zone is now in the higher elevations near a new shield being built over the main tube. This shield is at about the 1800 foot elevation and five miles from the ocean. A smaller amount of lava is still being carried downhill in smaller tubes and producing small surface flows on Pulama Pali and the coastal plain. Shields resemble small volcanoes in that the lava overflows from the top and spreads in all directions. These streams only go short distances before they crust up and are replaced by other streams. This process repeats itself countless times and builds the shield higher with each flow. Eventually the flow will sustain itself and go longer distances, including building a tube to the ocean.
Shields such as these are called rootless shields because they are supplied by a lava tube and not by a main vent coming from deep within the earth.
Recorded June 1, 2010
You have some of the best footage of Kilauea's Pu'u O'o eruption! I remember hiking out there numerous times to see the lava. Missed it. Now it is confined to the caldera.
Awesome! It's difficult to have a sense of scale in a landscape like this one but I really can't imagine those boulders to be car-size! The round one at the end of the video is really amazing! Thanks!
@kansasthunderman1: In my experience, the aa flows originate in steeper terrain, confined to narrow channels and move very fast. This stimulates the churning which exposes more surface area to rapid cooling. After the flow reaches flatter terrain, it will spread out over a larger area and slow down considerably...transitioning to pahoehoe. It will also form a crust which further protects the underlying lava from cooling very fast
This video's views are about to skyrocket
THE power of nature
I greatly appreciate Aa lava.
Stay strong Hawaii
XKCD incoming.
imyourbestbud xkcd army
imyourbestbud also view spike
That is the coolest thing I have ever seen its so cool I wanna swim in it if it was cooled off
What causes the erupted lava to form an "AA" VS a Pahoehoe flow?
It depends on the silica content and the temperature of the lava.
aa' and pahoehoe have the same chemical composition and temperature in each individual flow. The difference in appearance is due to the speed at which it cools. A slow moving pahoehoe that picks up speed such as from flowing downhill or forming a narrow channel will become an aa' flow due to the rapid churning of the lava at the front and margins which exposes more surface area to rapid cooling. A flow coming out of the vent at Pu'u O'o may be pahoehoe because the terrain is fairly flat and the flow spreads out. As it reaches Pulama Pali which is about two thousand feet high and very steep, it picks up speed and may form a narrow channel which is conducive to forming an a'a flow. When it reaches the bottom of the pali on the coastal flats it will again slow down and spread out to become pahoehoe. Of course there are many variables such as volume and whether it can find narrow spots to form channels even in flat areas.
Now I know why they sometimes call it "clinker"!
i see soo much mafic Aa lava and rocks.
Love the sound of the clinker! It's a shame that helicopter flying overhead ruins it.
wicked bro! keep em coming! i keep posting them on my twitterZensunni =) aloha!
대박이다 용암
ME DEBES UNOS DIENTES NUEVOS
Any idea of what causes the "breaking glass" sound of the aa flow?
Lava contains large amounts of the compound silica (SiO2), which is what glass is made of.
All you need to do is mention you're from XKCD and I'll get a ton of likes. Watch:
Umm, I don't think it's working yet... Do I have to keep watching? It's been three days and I'm hungry.
Well it worked for other videos. Of course this one gets nothing.
Why do YOU get a ton of likes when I mention it?
Maybe it'll work now...
No
rhyolitic lava!
All the lava in Hawaii is basalt.
SIN SON 🛸🚀🛰️
So tempted to touch it!!!!
I mean... If it wasn't so hot :(
+Sky DragonZ On large flows like this, the radiant heat on your exposed skin will keep you from approaching close enough to touch it. This is one of the reasons why the National Park allows visitors to hike near slow-moving flows...the radiant heat keeps visitors at a safe distance.
I know I’d want to poke it with a long stick.
(I know the heat would keep me away, but It’s just something I wish I could do).
DEJA DE HACERTE EL MUY MUY CAES MAL