10 votes
Accepted

Can human activity affect volcanoes?

I think you have drawn the 'short straw'! As disasters go, volcanoes have about the least to do with human activity. Basically, volcanoes are the product of plate tectonics, which operates on a scale ...
Gordon Stanger's user avatar
8 votes

Pyroclastic flow protection

The effectiveness of such shelters against pyroclastic flows have been wonderfully discussed by user889. However, I understand that those shelters were never intended to protect against pyroclastic ...
Camilo Rada's user avatar
  • 17.6k
7 votes
Accepted

Did the Geothermal Power Plant contribute to Pahoa's Lava Fissures?

Original answer I think we can confidently enough answer "no". From the report "Eruptions of Hawaiian Volcanoes—Past, Present, and Future" (Tilling et al. 2010): Kilauea eruptions ...
Jean-Marie Prival's user avatar
7 votes

Can human activity affect volcanoes?

Yes. Human activity can probably cause volcanic eruptions, albeit indirectly. Regardless, human activity affects volcanic disasters in several other ways. First, let's look at how humans can cause ...
Matt Hall's user avatar
  • 11k
7 votes

Can we reduce the scale of volcanic eruptions by drilling some canals or bombing some holes in the crater?

I will be using for an example in this answer the collapse of the lava dome at Mount St Helens in 1980. The lava dome on top of the mountain grew between March 20 and May 18, and then a landslide ...
Ben MS's user avatar
  • 538
6 votes

What would be the precursors to a repeated Lake Toba super eruption?

Massive, caldera-forming eruptions like the one at Toba usually happen at large silicic systems. At such systems, we expect a surface uplift as the pressure builds in the magma reservoir. This can be ...
Jean-Marie Prival's user avatar
5 votes

how are the global effects of local environmental disasters?

An excellent example of this would be the Mount Pinatubo eruption in 1991. The specific nature of this eruption features massive amounts of aerosols and ash put into the atmosphere. When Mount ...
Ben MS's user avatar
  • 538
5 votes

How big a risk is Mount Vesuvius for the local population?

There are lot of studies on the past activity of Mount Vesuvius. Eruptive deposits have been studied and dated in order to reconstruct the type and timing of past eruptions. This can give some ...
Jean-Marie Prival's user avatar
4 votes
Accepted

Would a global cooling event disable solar energy usage?

I am not sure about the size of Krakatoa eruption but the eruption of Mt. Pinatubo in Indonesia around 12th June 1991 is considered as the largest eruption in the past 100 years. Global average of ...
Harish's user avatar
  • 797
4 votes
Accepted

How are data from tiltmeters used to monitor volcanic activity?

Tiltmeters placed on the flanks of an active volcano can measure changes in the slope angle of the flank. These changes are often inferred to be related to changes in the shape and activity of the ...
user7939's user avatar
3 votes
Accepted

How can you infer the burning degree (Celcius etc) of a wood from a heat effected specimen?

There has been a recent study about this: Pensa et al. (2023) used charcoal samples found in the deposits of the 79 CE eruption of Mount Vesuvius to infer the temperature of its pyroclastic density ...
Jean-Marie Prival's user avatar
3 votes
Accepted

How long will red hot lava from the Sundhnúkur eruption in Iceland be visible?

I have experienced a similar situation two years ago. I visited the site of the 2021 Fagradalsfjall eruption on November 18, 2021, exactly two months after the last emission of lava (and one month ...
Jean-Marie Prival's user avatar
3 votes
Accepted

Volcanic activity in Taiwan, ever in recorded history, much chance in the near future?

There are at least 9 old centres of volcanic activity in Taiwan: The Tatun Volcano Group 15km north of Taipei, they think there are active magmatic systems there but the last eruption was 200,000 ...
Ash's user avatar
  • 4,260
3 votes

Can volcanos change the climate?

Can volcanos change the climate? Yes, but it has to be a very big one, like once every 100,000 years, perhaps every million years. The volcanic eruption of 75,000 years ago may have kickstarted, or ...
userLTK's user avatar
  • 5,847
3 votes

Can we reduce the scale of volcanic eruptions by drilling some canals or bombing some holes in the crater?

The general answer is no. There are two critical factors that govern how a volcanic eruption behaves; the pressure of the magma and the type of magma. Regarding the types of magma, this was asked ...
Fred's user avatar
  • 24.7k
3 votes

Earthquake severity during supereruption at Yellowstone caldera?

Volcanic earthquakes aren't actually all that strong. That's quite easily understandable by just looking at length scales: In the largest earthquakes that happen on earth, tens of kilometers of ...
Wolfgang Bangerth's user avatar
3 votes

Yellowstone Eruption Possibility?

1 in 100,000 is an estimate of frequency based on past eruptions which should not be confused with possbility or probability. It is an oversimplification to state the probability of an eruption as 0....
Earth Science Expatriate's user avatar
2 votes
Accepted

Is there a 'standard size' for volcanic eruptions in terms of gas output?

There is no "standard volcano" or "standard volcanic eruption". However, to perform the calculation you want to do, you could use the "typical" of "average" volcanic eruption. The characteristics of ...
Camilo Rada's user avatar
  • 17.6k
2 votes
Accepted

how are the global effects of local environmental disasters?

I'll add to Ben MS's answer by mentioning the 2010 eruption of Eyjafjallajökull in Iceland, that shut down air traffic for quite some time. Another example that comes to mind are tsunamis. The 2004 ...
Gimelist's user avatar
  • 23.1k
2 votes

Can we reduce the scale of volcanic eruptions by drilling some canals or bombing some holes in the crater?

Yes, but no. It highly depends on the circumstances. As Fred said in his answer, there are several types of magma. Some might flow almost like water while others might fragment and explode. You ...
Gimelist's user avatar
  • 23.1k
2 votes

Volcano magma chamber

You might get a lava seepage, but I doubt it. The cross-sectional area of a borehole is small compared to the total cross sectional area of fractures that are there already. Note that volcanoes bulge ...
Gordon Stanger's user avatar
2 votes

What geological processes affect the speed of Kilauea lava flows?

The speed of the lava flow from Kilauea depends on a few things: The amount of activity at the source of lava. This flow you are talking about is coming from a vent that is 20 miles from the Kilauea ...
f.thorpe's user avatar
  • 13.5k
2 votes

Eruptive fissures in Hawaii associated with Kilauea; what are they? What is really happening?

It can be either an eruption from the top of an existing tube or deep surface cracks opening up existing magmatic systems. I believe, from what I've been hearing in the news, that in this case they ...
Ash's user avatar
  • 4,260
2 votes
Accepted

Would a Yellowstone eruption destroy global agriculture?

An eruption of the Yellowstone super volcano would cause agricultural disaster over a very large area. Its global effect would be significant, but not totally devastating. The resulting climate ...
Fred's user avatar
  • 24.7k
2 votes
Accepted

Has Earth's geological activity calmed down in the past 250 million years?

The large-scale volcanic eruptions you mention are called Large Igneous Provinces (LIPs) and are probably linked to mantle plumes. They have been investigated for quite some time now. Ernst & ...
Jean-Marie Prival's user avatar
1 vote

Eruptive fissures in Hawaii associated with Kilauea; what are they? What is really happening?

Looking the diagram you supplied in the question, at the bottom there is graphical representation of a cross section through a volcano. The structure in red represents the magma conduits. Magma is ...
Fred's user avatar
  • 24.7k
1 vote

How are flying drones and unmanned vehicled used for exploring volcanoes?

Here's a partial answer: The Trail by Fire expedition 1.5 -- "We're a team of young volcanologists planning to measure the entire flux of gases emitted by volcanoes along the Nazca subduction zone." ...
jeffronicus's user avatar
  • 3,523

Only top scored, non community-wiki answers of a minimum length are eligible