40d Talk:Volcano

Volcano on world map.

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Where volcanoes form...? (verify)

The statement about volcanoes forming around the edge of oceans looks wrong to me. I was unaware of any such trend on the worlds I've seen so far. As I understand it, there is a magma activity map that varies across the the world and 'peaks' at certain points in the terrain creating volcanoes. I don't know how toady has implemented that, but I'm sure it has nothing to do with the rims of oceans. --Markavian

Cavern collapse

Is not related to the generation of water above magma and instant crystallisation and collapse. Because I got that phenomenon when I settled at an extinct volcano (no magma present in pipe). --Juckto 07:35, 29 June 2008 (EDT)

Erupting volcanoes

It would appear that volcanoes can now erupt http://mkv25.net/dfma/movie-685-volcano#lastComment;?%3E Diabl0658 03:19, 24 July 2008 (EDT)

Nope, that's just a (somewhat) common bug where a volcano and a bottomless pit are generated on the same spot. Here's another video of the same bug, where the poor dwarves embarked right next to the lava. http://mkv25.net/dfma/movie-701-shortestfortever Spoggerific 15:33, 12 August 2008 (EDT)

Does this bug occur immediately on embark, or anytime? I've had a volcano appear to erupt quite a bit after I embarked, it spit fire everywhere, and burnt up a bunch of the landscape (and several of my dwarves). JubalHarshaw 11:39, 31 December 2008 (EST)

Depends on the version, if you're importing an old save, and if Armok wants to see a bloodfest. --GreyMaria 22:28, 31 December 2008 (EST)

This was the latest version, so I can pretty much confirm that yes, volcanoes do erupt now. Saw it again tonight. JubalHarshaw 23:13, 31 December 2008 (EST)

Having said that, I was also attacked by a Fire Man tonight, that produced pretty much the same effect ... fire everywhere, burning everything. So I guess I can't truly confirm volcanoes erupt, it could have been a Fire Man. JubalHarshaw 00:19, 1 January 2009 (EST)

That depends - was the world burninating after the so-called "eruption" or was there just a solid sheet of ash among the trees? If it was the former, a fire man started the blaze; the latter, lava spilled over the world. This requires testing, apparently - time to embark over a volcano and survive for as long as possible. --GreyMaria 00:24, 1 January 2009 (EST)

That's not cool, I just got the latest version (finally) and I am living inside a volcano. Like there is this big circular cut through the mountain, and I dug through on the level above the magma and started a fort there, digging around the magma. Any tips, other than when I see strange activity order my dwarves to go downstairs and don't come out. I get the feeling I should move all of my stockpiles circling the vent... And I realize that not much is known aobut this, I just think some "general" safety tips would be a good thing to have now.--Destor 11:28, 1 January 2009 (EST)

I've been playing a fortress for 10 years straight on a named volcano that is open to the surface with no sign of an eruption (playing under 40d). It's possible only some volcanoes erupt, though, or that it's rare. Or it's possible that players are just witnessing the bug Spoggerific describes above. I know Toady wants volcanoes to erupt at some point, but I'm not aware that he's actually implemented it yet.--Maximus 14:52, 1 January 2009 (EST)

From the Release Notes for v0.28.181.39f: "stopped many bottomless pits from having their upper portions filled with lava". This is, in fact, what was causing the so-called "eruptions" on embark. I was even able to produce one in an embark region that had both a magma pipe and a magma pool, so this rules out the idea of it being caused by a bottomless pit and a magma pipe/pool being placed in the same location. --Quietust 18:32, 31 March 2010 (UTC)

Draining a volcano

I had read that magma tiles were supposed to be sources of magma.

So I am a bit suprised that having dug (admittedly a quite large) room in the bottom z-level then opened it up to the magma pipe, I have drained the top five z-levels of my volcano.

It has been several seasons now. I am wondering will the volcano pipe fill back up or have I drained it permenantly?

GarrieIrons 03:18, 31 August 2008 (EDT)

Magma occurs in one of two ways: pools and pipes. Magma pipes are never-ending sources of magma that refill fairly quickly, although not nearly as fast as aquifers. Magma pools, on the other hand, do not refill. I believe that magma tiles on the embark screen just mean that magma is visible on that particular surface tile. This means that both pools and pipes appear as magma tiles on embarking. This needs to be confirmed (because I could just be pulling this out of thin air, all my embark screen magma tiles have been pipes) but it would certainly explain your situation.--Zipdog 22:44, 23 April 2009 (UTC)

Trivial Stuff

A couple of things I found while experimenting, please verify:

• Volcanoes seem to cause high elevation in the surrounding area; even if the surrounding area is too low for the resulting mound to be classified as a mountain, every single volcano tile I've bothered to inspect has displayed as having extreme (20+) cliffs when viewed on the region map, even if it isn't technically a mountain. Amusingly, the crater is seldom at the peak of the mountain, as logic would seem to dictate.
• A bit of fiddling around with the world painter suggests that, instead of every 100-volcanism tile automatically being a volcano as the article implies, the game instead randomly picks (x) number of 100-volcanism tiles to become volcanoes, with (x) being the amount of volcanos specified in the worldgen parameters.

As a side note, I have to wonder about the wisdom of posting this here with the new version literally days away. --Mr Frog 17:17, 31 March 2010 (UTC)

High elevation in volcano map tiles -> Verified. Don't know about the second. I'm surprised the high elevation bit hadn't made it in already; it's how I find mountainous territory in grasslands or mountain-islands. --Retro 17:27, 31 March 2010 (UTC)