My Kepler Bb planet has 4 moons and is habitable. So that is good. But all 4 of these moons are major moons which while indeed possible, could be a problem.
You see, these moons are in resonance so regularly you will get moons eclipsing other moons. This makes eclipses much more complicated because you would not only have to divide it into solar and lunar and those into Partial, Total, and Annular for solar and Penumbral, Partial, and Total for lunar but know which moon or moons is/are causing the eclipse.
So for example you could have a 2 moon total solar eclipse.
As long as the moons rarely line up, this is fine. But if all the moons line up, something catastrophic might happen. I am talking about of course, a volcanic winter.
Now of course anyone living within miles of the volcano is in immediate danger. With a supervolcano, miles away from the volcanic eruption could be lava rain, literally lava falling from the sky like rain causing volcanic fires and deadly burns both from the lava and from the fire. But what about hundreds or thousands of miles from the volcano? This is also a danger zone but for a totally different reason. Instead of deadly heat from lava and fire, there is extreme cold from all the tephra spreading across the planet. For people not adapted to the arctic or Antarctic, this could be a serious problem. And even arctic aquatic animals might die from lack of oxygen due to all the ice and thus their predators might die off as well.
So you could express a volcanic winter as being like a global cold wave and during the eruption a heat wave relatively close to the volcano. Volcanic winters here on earth can last for up to a year. This volcanic winter from a supervolcano explains why it was so cold in The Year Without a Summer, even as far south as ohio, it was as cold as the arctic is now, deep negatives.
So then why not have all the people move down deep into the underground city where geothermal energy will keep them warm?
Well I could, except I can't. Why? Well for 1 thing, who is going to cook and harvest and do everything else? They are going to have to regularly go into the arctic weather. This means that frostbite and even freezing to death would be a common occurrence. And what about pregnant women? They won't do well in arctic weather and so the fetus wouldn't either.
So this means 1 of 2 things:
1) Have women go out into the cold regularly and try to induce a miscarriage or if far enough, labor
2) Have all the women huddle up in groups deep underground and only have the men regularly go out into the cold to work on expanding the civilization or to cook or to harvest or whatever they need to do
Truly, neither one is a good option but I would say option 2 is better.
Anyway, I am wondering, could this eclipsing of moons when it gets to the extreme(total lineup due to resonance) lead to an eruption of a supervolcano or even multiple supervolcanoes and thus lead to a long and harsh volcanic winter throughout the planet due to tidal forces or is that too extreme for multiple moons of an earth-like planet?