17 comments on “Recent Volcanic Activity in Nevada, USA – Part 2

  1. Very well documented article – loads of info.
    Lithium is all the rage now, I’m working on a similar a project in California.
    Meanwhile I’ve managed to get gmtpython working and here is the first try.
    One week of earthquake activity, Hawaii, 28/5 to 5/6


    • You can sure see the dynamic cycle for earthquakes – growing number of them until a large quake at which point they drop off for a while before building again. I think you captured two entire cycles. Cool. Cheers –

      Liked by 1 person

    • Those flows are really impressive. The fissure 8 cone last was 52 m (over 170 ft.) high; lava exiting fissure 8 travels 24 km/h (~15 mph), slowing to 3 km/h (~2 mph) near the ocean entry at Kapoho. — Seeing the images from half around the globe away one gets easily used to them… but imagine to live there, looking for the changes in your backyard every morning!


  2. I’m really, really curious to see what might become of the summit. Instead of a pit there is now a large crater. If the lava returns here, will it fill the entire new crater? That would be a humongous lava lake!


    • From USGS/HVO tweets:

      “Since major slumping into Halemaumau began, the deepest part of the crater is about 300m (still above water table) – we haven’t seen significant deepening, just additional slumping from the side walls into the deeper parts of the crater.”

      “The Halemaumau crater is already expanding toward HVO, and earthquakes have damaged the Observatory. Important historical materials are already in the process of being relocated to a safe storage location, so yes, we would make sure all of that is protected”.

      On further development: “We don’t know right now. It’s possible that the style of eruption of the last 35 years is over, but Kilauea has had multiple cycles where magma moved downrift and then returned, eventually, to the summit.” … “Fissure 8 may last for a while, but it’s not likely to become the main eruptive center.” … “If erupted for ~2 years, fissure 8 would probably look similar(ish) to Puʻu ʻŌʻō at about that time – a rather large cinder cone downwind with a vent on the side.”

      “Magma returning to the summit doesn’t necessarily mean the eruption is over. Also, we haven’t seen a clear pressure connection between summit events and fissure 8’s activity. Magma is moving into the Rift Zone at the same rate it’s moving out – a steady state of flow.”

      NPIT GPS station, on the north rim of Halema’uma’u, has over time dropped 90 m in total and might be lost now.


        • Yes, crass! I think it possible that – if the outflow goes on for much longer – the entire caldera floor could shatter and cave into the void. Depending on where and how big the reservoir is underneath. It could even affect the old walls and give the caldera another outline. Just my speculation, though.


  3. USGS has been patiently answering questions from the curious public on TW, and that of a “New caldera forming?” always got a definite “No.”. Kilauea summit is a “living” caldera. The floor of it has been much lower at times in the past. Presently it is deflating again because the magma is draining from underneath. Halema’uma’u is just a vent/crater from that reservoir. It is not getting deeper. Through the general sinking of the caldera floor the ground around that vent has cracked and slumped into it, thereby widening the crater. This doesn’t mean a new caldera is forming. We are seeing the modification of an existing one.

    Here’s another USGS image from 18/06, a good overview with the HVO and museum buildings for scale:


  4. Hi
    Here is the latest batch from 15th to 20th June.
    It is only events over mag 2.5 for a better clarity.
    I added a title and the date and hour of the events
    It is first an hour by hour view then it is cumulated

    made with gmt/python, data NOAA, USGS


    • Thanks dfm! It is really amazing, what other volcanically active places do in 5 months (or years) here happens in 5 days! So…it does look as if the magma is working hard to free up the path and break through at the same place again as before, probably making a new pit crater lake at the bottom of the big hole again? We wait…


      • The periodicity is still there. You captured at least 5 complete cycles. It also looks like the large quakes are very close to being the same location (E – W, depth unknown). Way cool. Many thanks, DFM. Cheers –


  5. Mead Lake Wisconsin has the same form, It looks like a blown up volcano tipped partly filled with water! So if you cut wisconsin in four parts criss crossing the left upper “North west “whole part would look like a cauldera with a maar or volcano like cauldera formation with sand like features of cinder cone type or tuff sand?!
    And Lindsey ,WI by the hilly areas..also looks like a volcanic part of a caulderas like formation..there is a tefra rock like formation rock….on the side of the road that looks like a side venting spot!
    There might be a plutton that is acting up here also..just northwest of Wausua. wi
    out cropping happenning! noticed this 2021 on the satilte map!
    Wisconsin has volcanics all over includg :Little Eau Claire Dells Volcano…and well ake Supoerior up north and including dike formations!


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