Volcanoes: Using Seismology to Find Where is the Magma and How Does it Get to the Surface?

Presented by Dr. Stephen McNutt, USF
Presented on 5/23/2018

[gristlevonraben]

The youtuber Dutchsinse has learned that volcanoes, active volcanoes, in between two large earthquakes will act like a pressure relief valve and often erupt, these are usually equidistant from the two earthquake epicenters but happen in sequence to the earthquake waves along the route to the next spot to shake, not as the last of the sequence. Many people have also put together that some volcanoes have exaggerated responses to earthquakes because their magma chambers are shaped in a way that amplifies the small waves that actually reach the volcano, acting like beaches in the magma, amplifying waves like beaches do ocean waves. Thank you for this information, it is excellent and eye opening for me. Have a great day!

[DalgetyBayHypnotherapy]

Superb presentation, thank you.
Question: You refer to the b value increasing where the crust is old and cold, but everything I've found online about the Gutenberg-Richter Law talks about the value being 1. Does a higher b number mean a greater proportion of stronger to weaker earthquakes?

[TheWyrdSmythe]

Very enjoyable! Thank you for posting that!

[BenFerraiuolo]

Amazing presentation. This is the career I want. Thank you.

[nightwaves]

Reverse engineer. Sulfur dioxide is saturated in lava. Earthquakes you track include ingress of water with hot lava. Between lava and water is reactions with gaseous forms of acid. Water mixed with acid can go into 1000+ kelvin. Don Swanson at Kilauea was wondering about explosions as the cause of some earthquakes. Water poured into acid is a major expansion. Possibly a volcano that has long productions of lava has circuits water and vapor can circulate being driven by the magma heat to that O2 and hydrogen from the water and in circulation could act like a blast furnace. That would explain your high gas content Hawaii lava. Metallurgists could point out some of the mixing they have to beware of that will blow up furnaces when making alloys.

[Amy-zbph]

Please tell me that, at the Pavlov Volcano, you could ring a bell and it would erupt. I mean that's unlikely, but it would be hilarious considering the name.

[nightwaves]

After the high number of Hawaii earthquakes it would be nice to see what picture of the lava chambers and paths it paints.