Still working on it – this page started from old work – 10 December 2023
Volcanoes – Lists by Country (United Nations membership names)
Colman’s Glossary of terms – Volcanoes

Global Volcanism Project – Current Eruptions

Sol Earth Volcanic Eruptions
Largest Volcanic Eruptions of the Third Millennium T02000~02999
Largest Volcanic Eruptions of the 21st Century T02000~02099
Ert_VEI 05 TON Tonga
Hunga Tonga–Hunga Haʻapai (wiki)
Eruption (wiki)
Sol_Ert_T02022_JAN_15
Ert_VEI 05 CHL Chile
Puyehue-Cordón Caulle (wiki)
Eruption (wiki)
Sol_Ert_T02011_JUN_04
Largest Volcanic Eruptions of the Second Millennium T01000~01999
Largest Volcanic Eruptions of the 20th Century T01900~01999AD
Sol Earth T01900~01999 – VEI 06
Sol_Ert_VEI_06 PHL Philippines
Mount Pinatubo (wiki)
Eruption (wiki)
Sol_Ert_T01991_JUN_15
Ert_VEI 06 GTM Guatemala
Santa María
Eruption (wiki)
Sol_Ert_T01902_OCT_24
Sol_Ert_VEI_06 USA United States of America Alaska
Novarupta (wiki)
Eruption (wiki)
Sol_Ert_T01912_JUN_06
Sol Earth 01900~01999AD – VEI 05
Ert_VEI 05 CHL Chile
Mount Hudson (wiki)
Eruption (wiki) H3 eruption: 1991 AD
Sol_Ert_T01991_AUG_08
Ert_VEI 05 USA United States of America Washington
Mount St. Helens (wiki)
Eruption (wiki)
Sol_Ert_T01980_MAY_18
Ert_VEI 05 RUS Russian Federation
Bezymianny (wiki)
Eruption (wiki)
Sol_Ert_T01956_MAR_30
Ert_VEI 05 CHL Chile
Quizapú (wiki)
Eruption (wiki) Major eruption, 1932
Sol_Ert_T01932_APR_10
Ert_VEI 05 RUS Russian Federation
Ksudach (wiki)
Eruption (wiki) Ksudach Eruptive history
Sol_Ert_T01907_MAR_28
Ert_VEI 05 MEX Mexico
El Chichón (wiki)
Eruption (wiki) 1982 eruption
Sol_Ert_T01982_APR_04
Ert_VEI 05 IDN Indonesia
Mount Agung (wiki)
Eruption (wiki) 1963–64 eruption
Sol_Ert_T01963_MAR_17
Ert_VEI 05 RUS Russian Federation
Kharimkotan (wiki)
Eruption (wiki)
Sol_Ert_T01933
Ert_VEI 05 JPN Japan
Submarine volcano NNE of Iriomote Island (wiki)
Eruption (wiki)
Sol_Ert_T01924_OCT_31
Largest Volcanic Eruptions of the 19th Century T01800~01899
Sol_Ert_T01800~01899 – VEI 07
Ert_VEI 07 IDN Indonesia
Mount Tambora (wiki)
Eruption (wiki)
Sol_Ert_T01815_APR_10
Largest Volcanic Eruptions of the 18th Century T01700~01799
Sol_Ert_VEI_05 JPN Japan
Mount Fuji (wiki)
Hōei Eruption (wiki)
Sol_Ert_T01707_DEC_06
Largest Volcanic Eruptions of the 17th Century T01600~01699
Largest Volcanic Eruptions of the 16th Century T01500~01599
Largest Volcanic Eruptions of the 15th Century T01400~01499
Largest Volcanic Eruptions of the 14th Century T01300~01399AD
Largest Volcanic Eruptions of the 13th Century T01200~01299AD
Sol Earth T01200~01299 – VEI_07
Sol_Ert_VEI_07 IDN Indonesia
Vol_Samalas Lombok Island
Sol_Ert_T01257
Google – Samalas Volcano
(wiki) Mount Rinjani – (wiki) Lake Segara Anak
Eruption (wiki) 1257 Samalas eruption
The 1257 CE cataclysmic eruption of Samalas volcano (Indonesia) revealed by indigenous written sources: Forgotten kingdoms, emergency response, and societal recovery Journal of Volcanology and Geothermal Research Volume 432, December 2022
Largest Volcanic Eruptions of the First Millennium T00000~00999
Sol_Ert_VEI 05 ROMA
Mount Vesuvius (wiki)
Eruption Colmans
Eruption (wiki)
Sol_Ert_T00079_OCT
Largest Volcanic Eruptions of the BC 1st-5th Millenniums T-00000~04999
Sol_Ert_VEI 06 Minoa
Thera (Santorini) Island, Greece
Anchient Thera (wiki)
Eruption (wiki)
Sol_Ert_T-01600 (BC)
Colman’s Glossary of Terms – Volcanoes
Glossary A – B – C – D – E – F – G – H – I – J – K – L – M – N
Glossary O – P – Q – R – S – T – U – V – W – X – Y – Z
Volcanoes Glossary of Terms – Original Sources
USA – USGS Glossary of Volcanic terms
USA – PBS.org Glossary of Volcanic terms

A is for Apple – Back to Volcanoes Glossary
Alert Systems – VolcanoLive.com John Seach – Volcano Warning Systems – Various Countries
- Chile – Volcano Alert System – Explanation page
- New Zealand – Volcanic Alert Levels
- USA – USGS National Volcano Early Warning System – monitoring volcanoes according to their threat By Volcano Hazards Program

Aster Volcano Archive

B is for Bear – Back to Volcanoes Glossary
BBC Science Focus.com Search Volcano
C is for Calamity Jane – Back to Volcanoes Glossary
Cataclysmic Volcanic Eruption
VEI Five (5)
Volume of erupted material
>1km^3
Catastrophic Volcanic Eruption
VEI Four (4)
Volume of erupted material
>0.1km^3
Central Andes

Andean Volcanic Belt (wiki)
The Central Volcanic Zone extends from Peru to Chile and forms the western boundary of the Altiplano plateau. (wiki) Andes Mountain range South America
Colossal Volcanic Eruption
VEI SIX (6)
Volume of erupted material >10km^3.
Continental Fracture Zone (CFZ)
A belt of activity following the mountain ranges from Spain via the Alps, to the Middle East, the Himalayas to the East Indies and then circumscribing the Pacific. GBR school text
D is for Disaster – Back to Volcanoes Glossary
Deaths – Vulcanologists Journal of Applied Volcanology Table 7 Incidents in which volcanologists or field scientists died – Smithsonian Institute
Decade Volcanoes Wikipedia – List The Decade Volcanoes are 16 volcanoes identified by the International Association of Volcanology and Chemistry of the Earth’s Interior (IAVCEI) as being worthy of particular study in light of their history of large, destructive eruptions and proximity to densely populated areas.” They are named Decade Volcanoes because the project was initiated in the 1990s as part of the United Nations sponsored International Decade for Natural Disaster Reduction. Note: VolcanoCafe.org a relatively short lived website proposed in 2015 a New Decade Volcano Program: there is a list of their thoughts on the Worlds 10 most dangerous volcanoes there.
E is for Emergency – Back to Volcanoes Glossary
Effusive Volcanic Eruption
VEI Zero (0)
Volume of erupted material < (less than) 104 (100,000) meters^3(cubed).
Explosive Volcanic Eruption
VEI Two (2)
Volume of erupted material >(greater than) 105 (1million) metres^3 (cubed).
Epicenter
The point on the earth’s surface directly above the focus is called the epicentre. The epicentre suffers the most powerful shockwaves and damage from an earthquake. IRL Geological Survey article
The epicenter, epicentre, or epicentrum in seismology is the point on the Earth’s surface directly above a hypocenter or focus, the point where an earthquake or an underground explosion originates. Wikipedia article
The epicenter is the point on the earth’s surface vertically above the hypocenter (or focus), point in the crust where a seismic rupture begins. USA Definition & diagram – USGS
F is for Floor – Back to Volcanoes Glossary
Fissure In geology, a fissure is a fracture or crack in rock along which there is a distinct separation; fissures are often filled with mineral-bearing materials. On volcanoes, a fissure is an elongate fracture or crack at the surface from which lava erupts. USGS
Focus (seismic or earthquake)
Fumaroles are vents from which volcanic gas escapes into the atmosphere. Fumaroles may occur along tiny cracks or long fissures, in chaotic clusters or fields, and on the surfaces of lava flows and thick deposits of pyroclastic flows. USGS
G is for Guidance – Back to Volcanoes Glossary

GeoNames.org – Enter Volcano in the Search 1,072 volcanoes.
Geologic Time Scale – (USGS Diagram)
Geology of Ireland – IRL Geological Survey

To quote an Irish Tea Towel; I’m sorry the letter is so long, I didn’t have time to shorten it.
Would you prepare a lesson on … tomorrow?
I’d say the little book is worth maybe a weekend, ten 40 min lectures, late start Sat, exam Sun, coffee 15mins morning and evening and lunch 1hour about 1230, and five min toilet breaks between double lectures? You can’t copy and paste the text? Well, you’re supposed to learn the stuff by typing it and spell checking your slides, though pronunciations tend to be unusual if you haven’t heard the big wordy things before.
Little Book? Well, Lord of the Rings was complicated and 1500 pages and it took me 10 days. And it was summer and we were doing other stuff too. I think I was 14 or something? In my head the story is a bit hazy now from watching the movies, however the map is still cool. The mountain retreat and cave system was to the West of the horsey peoples big house on the hill (from the movie). Mordor was to the South East. LOTR Map – I looked it up after I wrote that, still good.
Gentle Volcanic Eruption
VEI One (1)
Volume of erupted material >(greater than) 104 (100,000) meters^3 (cubed).
Global Volcanism Project USA Smithsonian Institute List of all Volcano Sources by Country
H is for Holocene – Back to Volcanoes Glossary
Holocene
Holocene. The youngest geologic time period, considered to include the past approximately 12,000 years. It is almost equivalent to postglacial time. (definition USGS)
The Holocene is the current geological epoch, beginning approximately 11,700 years ago. (definition Wikipedia)
Colman’s comment: 10,000BC to now, 12,000 years. An argument could be made for a new definition of an Satcene period from 2000AD ongoing to define the current period as that when availability of Satellite information became widely available, Holocene appears to refer to it being identified by having looked in a hole, though not a very deep hole.
Hypocenter
A hypocenter or hypocentre (from Ancient Greek ὑπόκεντρον (hupókentron) ‘below the center’), also called ground zero or surface zero, is the point on the Earth’s surface directly below a nuclear explosion, meteor air burst, or other mid-air explosion. In seismology, the hypocenter of an earthquake is its point of origin below ground; a synonym is the focus of an earthquake. Wikipedia
Hypocentre is the ‘focus’ point within the ground where the strain energy of the earthquake stored in the rock is first released. The distance between this and the epicentre on the surface is called the focal length. GBR school text
Focus The point within the earth’s crust where the earthquake begins is called the focus. The focus can be tens of kilometres deep and it emits powerful shockwaves or tremors that shake the earth’s crust. IRL Geological Survey article
Hypocenter Colman’s definition The point of apparent “injection” of the energy of the event used for calculation of the seismic effects of the event.
Colman’s footnote: while my definition seems to exclude the cometary impact on Jupiter in T01994, I would argue that the seismic effects here were in the atmospherics of Jupiter, similar to concussive effects of a bullet entering water, with effects at gaseous, liquid and possibly solid boundaries, and I would argue for the hypocentre of the event on Jupiter to be held as at the liquid boundary as this is the predominant surface of the planet. While the ability to detect the surface waves of the cometary event might not have been possible in T01994, an argument for further study of similar events in the future might be made? “Oh, and Jupiter moved, annoying isn’t it.”
Types of Hypocenter
Seismic hypocenter
Above an earthquake (2023 Turkey–Syria earthquakes)
Nuclear burst hypocenter
Below or at a nuclear explosion (Atomic bombings of Hiroshima and Nagasaki)
Meteor hypocenter
Below an atmospheric meteor explosion or at the point of impact of a meteor (Tunguska Event)
I is for Indium – Back to Volcanoes Glossary

International Union of Geodesy and Geophysics, The (IUGG) is the international organization dedicated to advancing, promoting, and communicating knowledge of the Earth system, its space environment, and the dynamical processes causing change.
Intra-plate Earthquakes
These occur in the middle or interior of tectonic plates and are much rarer than boundary Earthquakes. GBR School text
J is for Jericho – Back to Volcanoes Glossary
K is for Kilogram – Back to Volcanoes Glossary
L is for Liberated – Back to Volcanoes Glossary
Lahar A volcanic mud flow, normally from a crater lake or reservoir which burst from the top of the volcano (sometimes at high temperature) flooding the areas below the volcano with mud, the solid material being either the local pulverised local lavas and tephra and sometimes with locally deposited ash. (Colman’s definition). See: Advancing Earth and Space Science Blogosphere (Search: Lahar)
List of Tectonic Plates Sol_Ert_T02024 Diagram from GBR school text
- North American Plate
- South American Plate
- Cocos Plate
- Nasca Plate
- Caribbean Plate
- Eurasian Plate
- African Plate
- Arabian Plate
- Iranian Plate
- Pacific Plate
- Indo-Australian Plate
- Antartic Plate
List of all Volcano Sources by Country Global Volcanism Project Smithsonian Institute
List of LARGE Volcanic Eruptions – Wikipedia
List of World Volcanoes Volcanoes of the World | John Seach VolcanoLive.com
List of The 10 biggest Earthquakes in the world since 1900 – Volcano Discovery
List of places where Hex basalts are found. (Giants Causeway – columnar jointed volcanics, slow cooled, why? You seen Pele’s hair, annoying stuff isn’t it. Glass contracts on cooling.) Wikipedia
M is for Mission – Back to Volcanoes Glossary
Mega-colossal Volcanic Eruption – VEI EIGHT (8)
Volume of erupted material >1000km^3.
N is for Not in my lifetime – Back to Volcanoes Glossary
O is for Outer Space – Back to Volcanoes Glossary
Outer Space Volcanoes Link to Space Volcanoes
Oceanic Fracture Zone (OFZ)
A belt of activity through the oceans along the mid-ocean ridges, coming ashore in Africa, the Red Sea, the Dead Sea rift and California. GBR school text
P is for Prehistoric – Back to Volcanoes Glossary
Paleomagnetism
Paleomagnetism results from the zone of magma ‘locking in’ or ‘striking’ the Earth’s magnetic polarity when it cools. Scientists can use this tool to determine historic periods of large scale tectonic activity through the reconstruction of relative plate motions. They create a geo-timeline. GBR school text
The study of Earth’s past magnetism is called paleomagnetism. Direct observations of the (Earth’scolman) magnetic field extend back just a few centuries, so scientists rely on indirect evidence. NASA T02021
Earth’s Magnetosphere: Protecting Our Planet from Harmful Space Energy

NASA Science Editorial Team
Aug 03, 2021
Paleomagnetism (occasionally palaeomagnetism) is the study of prehistoric Earth’s magnetic fields recorded in rocks, sediment, or archeological materials. Wikipedia

Pele’s hair and Pele’s tears article Amusing Planet.com
Plate boundary (tectonic)
A line where two tectonic plates meet.
Plate Boundary Types
(Mnemonic – DCC RCSQ Colman T02024_SEP)
Divergent
Plates departing from one another form boundary weaknesses through which magma and gasses can flow making new solid volcanic rock (Rift boundaries) adding to the Earth’s lithosphere and venting gases to the Earth’s atmosphere, at land volcanoes (Iceland), sometimes at oceanic ridges (Mid Atlantic ridge).
Convergent
Plates colliding together (Collision boundaries) can push up mountains and deform the landscapes on both sides of the plate boundary (Himalayas) or form subduction zones (Subduction boundaries), where the friction of one plate moving under the other creates heat melting the rock at the boundaries which sometimes erupts to the surface as volcanoes and in the case of the boundary being under water with steam from the subducted rock being saturated with seawater.
Conservative
Plates sliding past each other with oblique-slip, sliding or transform movements do not add to or remove material from the lithosphere (Quiet boundaries) (the Earth surface’s solid material).
Pleistocene The Pleistocene (Ice Age) is the geological epoch that lasted from c. 2.58 million to 11,700 years ago, spanning the Earth’s most recent period of repeated glaciations. Wikipedia (definition USGS)
Q is for Quaternity – Back to Volcanoes Glossary
R is for Reserved – Back to Volcanoes Glossary
Radar Interferometry Radar Interferometry is a technique which allows relatively small changes in heights of the land area to be interpreted using two separate radar pictures at different times, thus showing if the land has risen or fallen showing possible build up of magma or expansion/contraction of the underground rock due to heating/cooling. It can also show changes due to ground height movements caused by tectonic (earthquake) activity, ground water saturation and drying. Definition by Colman
S is for Survival – Back to Volcanoes Glossary
Seismic Hazards
These are generated when rocks within 700 km of the Earth’s surface come under such stress that they break and become displaced. GBR School text
Severe Volcanic Eruption
VEI Three (3)
Volume of erupted material
> 106metres^3 (10million)
Space Volcanoes

Sulpher Dioxide (SO2) Windy.com Sol-Earth – SO2 map (It comes out of Volcanoes too. Colman) EPA Ireland Archive of Sulphur Dioxide (SO2) Monitoring Data EPA “””Sulphur dioxide (SO2) is formed when fuel (mainly coal, peat and oil) containing sulphur is burned at power plants and elsewhere. High concentrations of SO2 can result in temporary breathing impairment for asthmatics. SO2 is a major precursor to acid rain, which is associated with the acidification of soils, lakes, and streams and accelerated corrosion of buildings and monuments.””” UPDATE NEEDED (NASA) The gas is measured in Dobson Units (DU), the number of molecules in a square centimetre (column) of the atmosphere. If you were to compress all of the sulphur dioxide in a column of the atmosphere into a flat layer at standard temperature and pressure (0o C and 1013.25 hPa), one Dobson Unit would be 0.01 millimetres thick and would contain 0.0285 grams of SO2 per square meter. “””It is toxic to humans and concentrations as low as 8 ppm (parts per million) will produce coughing (NASA refers to http://mattson.creighton.edu/SO2/SO2_Info.html)”””
Super-Colossal Volcanic Eruption VEI SEVEN (7)
Volume of erupted material >100km^3.
T is for Tertiary Adjunct – Back to Volcanoes Glossary
Tectonic hazards
Tectonic hazards include earthquakes and volcanic eruptions as well as secondary hazards such as tsunami. They can be classified as either seismic or volcanic. GBR school text
Tephra – The solid stuff thrown out from a Volcano. Theoretically Trevor, Sean, and Hannah, in “Journey to the Centre of the Earth” (movie_2008) were tephra when thrown out of the volcano at the end of the movie. Skull ride final scene (3/3) //journey to the centre of earth. YouTube
U is for Universal – Back to Volcanoes Glossary
V is for Vector – Back to Volcanoes Glossary

Volcano Live Dr John Seach – Volcano News, Adventure Travel, Photography, Film and Television Production. 38 years of volcano adventures. 23 years on the Internet 2000-2023. The world’s first volcano news and volcano travel website.
Volcanic Explosive Index (VEI) – (USGS Glossary definition and diagram) is a relative measure of the explosiveness of volcanic eruptions. It was devised by Christopher G. Newhall of the United States Geological Survey (USA – USGS) and Stephen Self in 1982. (Wikipedia)
Volcano
A landform that develops around a weakness in the Earth’s crust from which molten magma, volcanic rock, and gases are ejected or extruded. GBR School text Where’s the sea volcanoes?
A cone shaped mountain formed out of rock or ash thrown up from inside the earth, frequently with an opening or depression at the top. USA NASA Earthdata Definition From USGS T2024_SEP_09
Volcano Colman’s Definition T02024_SEP_09 – A geological feature where the heated or less dense solid, liquid or gaseous interior of a planet or moon is erupted, extruded, or vented over the body’s solid surface, sometimes forming a solid volcanic cone, vent, plateau or ridge.
W is for Wednesday – Back to Volcanoes Glossary
X is for Xylophone – Back to Volcanoes Glossary
Y is for Yellowstone National Park – Back to Volcanoes Glossary
Yellowstone Caldera (Wikipedia) also called Yellowstone Supervolcano.

Yellowstone National Park USA National Park Service “On March 1, 1872, Yellowstone became the first national park for all to enjoy the unique hydrothermal and geologic features. Within Yellowstone’s 2.2 million acres, visitors have unparalleled opportunities to observe wildlife in an intact ecosystem, explore geothermal areas that contain about half the world’s active geysers, and view geologic wonders like the Grand Canyon of the Yellowstone River.”
Yellowstone Volcano Oregon State University “Yellowstone National Park rests in a huge caldera. It has been the location of three very large eruptions in the last two million years. The volume of lava erupted from the Yellowstone caldera during these events makes the 1980 eruption of Mt. St. Helens look extremely small. Because of this, Yellowstone is considered to be one of the most dangerous volcanoes in the United States.” Submitted by admin on Wed, 08/31/2011 – 09:38
Yellowstone Volcano Observatory USA United States Geological Survey
Z is for Zulu Dawn – Back to Volcanoes Glossary
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“Please return your
seat backs and tray tables
to their upright positions
and thank you for flying Air-Colman.”
Its a P!nk joke.
Thank you for your attention. Colman



