Havre Volcano

TODAY, words from this article capture my interest, as I incrementally investigate as a layperson:

“Magma Reservoirs, Chambers and Mushes”: How do we know they exist?The vigor and size of volcanic eruptions depend on what happens in magma reservoirs in the Earth’s crust. When magmatic activity occurs within continental areas, large reservoirs of viscous, gas-rich magma can be generated and cataclysmically discharged into the atmosphere during explosive supereruptions. As currently understood, large pools of explosive magma are produced by extracting interstitial liquid from long-lived “crystal mushes” (magmatic sponges containing >50 vol% of crystals) and collectingit in unstable liquid-dominated lenses.


Back to the bucket that started my interest:

31deg 1.9’South 178deg 58.8’West 1830 m depth

31deg 1.9’South, 178deg 58.8’West, 1830 m depth

Hi Joan – I’m out with ROV Jason and Sentry AUV here 2 days north of New Zealand at Havre Volcano, a submarine volcano that erupted in 2012.  We have been doing some gravity coring and there was some extra mud that I’ve stashed away for you.  The Jason system will be back at WHOI in late June and I’ll bring it over to you.

If you want info on where we are and about Havre Volcano you can find it at this website.

Hope all is well with you.

The position of the mud sample is:

31deg 1.9’S
178deg 58.8’W
1830 m depth


Joan says, on June 3, 2015, the day she opened the bucket curious to see what Dan described as 70% silica, wow!  Amazing the changing material and fit of plastic lids and buckets these days — first task was getting in.  Dan also said there’d be lots of sea water which I reverently decanted while romanticizing how close I now am to a once-ferocious volcano.  Next I dug in, nodding that this is pumicy, granular, wishing I had a microscope.  Like Mt. St. Helen’s ash?

Mount St. Helen's Ash on Stoneware

Mount St. Helen’s Ash on Stoneware

In a few weeks I’ll have a test fired but for now, my hunches are to pour it over porcelain and use the blackest writing — guessing, a yellowish green glaze outcome and wondering how a reducing atmosphere might color it (can I get some carbon trap?)


June 28th, 2015:OLYMPUS DIGITAL CAMERA                                             Pumice Sample thanks to Adam Soule

Adam is curious about whether pure pumice ground into varied particle sizes will look similar to the pumicy mud Fired Havre Pumice/Mud recently.  I’ll test it soon.

Mud from THE Bucket

Mud from THE Bucket (melted on porcelain clay)

There are some for sale and hopefully there’ll be more in future firings.  I never take much for granted about the buildings where I work — a hurricane or a sale of property could take them from me.

Well Adam, here’s the question and the answer:

Four Mesh's of Pumice Before Firing

Four Mesh’s of Pumice Before Firing

Four Meshes of Pumice After Firing

Four Meshes of Pumice After Firing


One thought on “Havre Volcano

  1. Samm Carlton

    Whoeee, gutsy stuff: an oceanic miracle gift from a thoughtful scientist to an always creatively fascinated, highly intelligent artist-potter.
    Now, get yourself a microscope!
    You deserve.


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