Timeline of volcanism on Earth

This timeline of volcanism on Earth includes a list of major volcanic eruptions of approximately at least magnitude 6 on the Volcanic explosivity index (VEI) or equivalent sulfur dioxide emission during the Quaternary period (from 2.58 Mya to the present). Other volcanic eruptions are also listed.

Clickable imagemap of notable volcanic eruptions. The apparent volume of each bubble is linearly proportional to the volume of tephra ejected, colour-coded by time of eruption as in the legend. Pink lines denote convergent boundaries, blue lines denote divergent boundaries and yellow spots denote hotspots.

Some eruptions cooled the global climate—inducing a volcanic winter—depending on the amount of sulfur dioxide emitted and the magnitude of the eruption.^[1][2] Before the present Holocene epoch, the criteria are less strict because of scarce data availability, partly since later eruptions have destroyed the evidence. Only some eruptions before the Neogene period (from 23 Mya to 2.58 Mya) are listed. Known large eruptions after the Paleogene period (from 66 Mya to 23 Mya) are listed, especially those relating to the Yellowstone hotspot, Santorini caldera, and the Taupō Volcanic Zone.

Active volcanoes such as Stromboli, Mount Etna and Kīlauea do not appear on this list, but some back-arc basin volcanoes that generated calderas do appear. Some dangerous volcanoes in "populated areas" appear many times: Santorini six times, and Yellowstone hotspot 21 times. The Bismarck volcanic arc, New Britain, and the Taupō Volcanic Zone, New Zealand, appear often too.

In addition to the events listed below, there are many examples of eruptions in the Holocene on the Kamchatka Peninsula,^[3] which are described in a supplemental table by Peter Ward.^[4]

Large Quaternary eruptions

Main article: List of Quaternary volcanic eruptions

The Holocene epoch begins 11,700 years BP (10,000 ¹⁴C years ago).^[5]

1000–2000 AD

• Pinatubo, island of Luzon, Philippines; 1991, June 15; VEI 6; 6 to 16 km³ (1.4 to 3.8 cu mi) of tephra;^[6] an estimated 20,000,000 tonnes (22,000,000 short tons) of SO
  ₂ were emitted^[2]
• Novarupta, Alaska Peninsula; 1912, June 6; VEI 6; 13 to 15 km³ (3.1 to 3.6 cu mi) of lava^[7][8][9]
• Santa Maria, Guatemala; 1903, October 24; VEI 6; 20 km³ (4.8 cu mi) of tephra^[10]
• Krakatoa, Indonesia; 1883, August 26–27; VEI 6; 21 km³ (5.0 cu mi) of tephra^[11]
• Mount Tambora, Lesser Sunda Islands, Indonesia; 1815, Apr 10; VEI 7; 160–213 km³ (38–51 cu mi) of tephra;^[12][6] an estimated 200,000,000 t (220,000,000 short tons) of SO
  ₂ were emitted, produced the "Year Without a Summer"^[13]
• 1808 mystery eruption, VEI 6–7; discovered from ice cores in the 1980s.^[14][15][16]
• Grímsvötn, Northeastern Iceland; 1783–1785; Laki; 1783–1784; VEI 2; 14 km³ (3.4 cu mi) of lava, an estimated 120,000,000 t (130,000,000 short tons) of SO
  ₂ were emitted, produced a Volcanic winter, 1783, on the North Hemisphere.^[17][18]
• Long Island (Papua New Guinea), Northeast of New Guinea; 1660 ±20; VEI 6; 30 km³ (7.2 cu mi) of tephra^[6]
• Huaynaputina, Peru; 1600, February 19; VEI 6; 30 km³ (7.2 cu mi) of tephra^[19]
• Billy Mitchell, Bougainville Island, Papua New Guinea; 1580 ±20; VEI 6; 14 km³ (3.4 cu mi) of tephra^[6]
• Bárðarbunga, Northeastern Iceland; 1477; VEI 6; 10 cubic kilometres (2.4 cu mi) of tephra^[6]
• 1465 mystery eruption "the location of this eruption is uncertain, as it has only been identified from distant ice core records and atmospheric events around the time of King Alfonso II of Naples's wedding; it is believed to have been VEI 7 and possibly even larger than Mount Tambora's in 1815.^[20][21]
• 1452/1453 mystery eruption in the New Hebrides arc, Vanuatu; the location of this eruption in the South Pacific is uncertain, as it has been identified from distant ice core records; the only pyroclastic flows are found at Kuwae; 36 to 96 km³ (8.6 to 23.0 cu mi) of tephra; 175,000,000–700,000,000 t (193,000,000–772,000,000 short tons) of sulfuric acid^[22][23][24]
• 1280(?) in Quilotoa, Ecuador; VEI 6; 21 km³ (5.0 cu mi) of tephra^[6]
• 1257 Samalas eruption, Rinjani volcanic complex, Lombok Island, Indonesia; 40 km³ (dense-rock equivalent) of tephra, Arctic and Antarctic Ice cores provide compelling evidence to link the ice core sulfate spike of 1258/1259 A.D. to this volcano.^[25][26]

Overview of Common Era

Main article: List of large volcanic eruptions

This is a sortable summary of 27 major eruptions in the last 2000 years with VEI ≥6, implying an average of about 1.3 per century. The count does not include the notable VEI 5 eruptions of Mount St. Helens and Mount Vesuvius. Date uncertainties, tephra volumes, and references are also not included.

Caldera/ Eruption name	Volcanic arc/ belt or Subregion or Hotspot	VEI	Date	Known/proposed consequences
Mount Pinatubo	Luzon Volcanic Arc	6	1991, Jun 15	Global temperature fell by 0.4 °C
Novarupta	Aleutian Range	6	1912, Jun 6
Santa María	Central America Volcanic Arc	6	1902, Oct 24
Krakatoa	Sunda Arc	6	1883, Aug 26–27	At least 30,000 dead
Mount Tambora	Lesser Sunda Islands	7	1815, Apr 10	Year Without a Summer (1816)
1808 mystery eruption	Southwestern Pacific Ocean	6	1808, Dec	A sulfate spike in ice cores
Long Island (Papua New Guinea)	Bismarck Volcanic Arc	6	1660
Huaynaputina	Andes, Central Volcanic Zone	6	1600, Feb 19	Russian famine of 1601–1603
Billy Mitchell	Bougainville & Solomon Is.	6	1580
Bárðarbunga	Iceland	6	1477
1458 mystery eruption	unknown	6-7	1458	Possibly larger than Mount Tambora's
1452/1453 mystery eruption	Unknown	6-7	1452–53	2nd pulse[27] of Little Ice Age?
Quilotoa	Andes, Northern Volcanic Zone	6	1280
Samalas (Mount Rinjani)	Lombok, Lesser Sunda Islands	7	1257	1257 Samalas eruption, 1st pulse[28][29] of Little Ice Age? (c.1250)
Baekdu Mountain/Tianchi eruption	China/ North Korea border	7	946, Nov-947	Limited regional climatic effects.[30]
Ceboruco	Trans-Mexican Volcanic Belt	6	930
Dakataua	Bismarck Volcanic Arc	6	800
Pago	Bismarck Volcanic Arc	6	710
Mount Churchill	eastern Alaska, USA	6	700
Rabaul caldera	Bismarck Volcanic Arc	6	683 (est.)
Volcanic winter of 536	Krakatoa	6-7	535
Ilopango	Central America Volcanic Arc	6	450
Ksudach	Kamchatka Peninsula	6	240
Taupō Caldera/Hatepe eruption	Taupō Volcano	7	180 or 230	Affected skies over Rome and China
Mount Churchill	eastern Alaska, USA	6	60
Ambrym	New Hebrides Arc	6	50
Apoyeque	Central America Volcanic Arc	6	50 BC (±100)

Note: Caldera names tend to change over time. For example, Ōkataina Caldera, Haroharo Caldera, Haroharo volcanic complex, and Tarawera volcanic complex all had the same magma source in the Taupō Volcanic Zone. Yellowstone Caldera, Henry's Fork Caldera, Island Park Caldera, Heise Volcanic Field all had Yellowstone hotspot as magma source.

Earlier Quaternary eruptions

See also: List of Quaternary volcanic eruptions

2.588 ± 0.005 million years BP, the Quaternary period and Pleistocene epoch begin.

• Eifel hotspot, Laacher See, Vulkan Eifel, Germany; 12.9 ka; VEI 6; 6 cubic kilometers (1.4 cu mi) of tephra.^{[31][32][33][34]}
• Emmons Lake Caldera (size: 11 x 18 km), Aleutian Range, 17 ka ±5; more than 50 km³ (12 cu mi) of tephra.^[4]
• Lake Barrine, Atherton Tableland, North Queensland, Australia; was formed over 17 ka.
• Menengai, East African Rift, Kenya; 29 ka^[6]
• Morne Diablotins, Commonwealth of Dominica; VEI 6; 30 ka (Grand Savanne Ignimbrite).^[35]
• Phlegraean Fields, Italy; VEI 7; 40 ka (Campanian Ignimbrite eruption).
• Kurile Lake, Kamchatka Peninsula, Russia; Golygin eruption; about 41.5 ka; VEI 7^[6]
• Maninjau Caldera (size: 20 x 8 km), West Sumatra; VEI 7; around 52 ka; 220 to 250 cubic kilometers (52.8 to 60.0 cu mi) of tephra.^[36]
• Lake Toba (size: 100 x 30 km), Sumatra, Indonesia; VEI 8; 73 ka ±4; 2,500 to 3,000 cubic kilometers (599.8 to 719.7 cu mi) of tephra; probably six gigatons of sulfur dioxide were emitted (Youngest Toba Tuff).^{[2][37][38][39][40]}
• Atitlán Caldera (size: 17 x 20 km), Guatemalan Highlands; Los Chocoyos eruption; formed in an eruption 84 ka; VEI 7; 300 km³ (72 cu mi) of tephra.^[41]
• Mount Aso (size: 24 km wide), island of Kyūshū, Japan; 90 ka; last eruption was more than 600 cubic kilometers (144 cu mi) of tephra.^[4][42]
• Sierra la Primavera volcanic complex (size: 11 km wide), Guadalajara, Jalisco, Mexico; 95 ka; 20 cubic kilometers (5 cu mi) of Tala Tuff.^[4][43]
• Mount Aso (size: 24 km wide), island of Kyūshū, Japan; 120 ka; 80 km³ (19 cu mi) of tephra.^[4]
• Mount Aso (size: 24 km wide), island of Kyūshū, Japan; 140 ka; 80 km³ (19 cu mi) of tephra.^[4]
• Puy de Sancy, Massif Central, central France; it is part of an ancient stratovolcano which has been inactive for about 220,000 years.
• Emmons Lake Caldera (size: 11 x 18 km), Aleutian Range, 233 ka; more than 50 km³ (12 cu mi) of tephra.^[4]
• Mount Aso (size: 24 km wide), island of Kyūshū, Japan; caldera formed as a result of four huge caldera eruptions; 270 ka; 80 cubic kilometers (19 cu mi) of tephra.^[4]
• Uzon-Geyzernaya calderas (size: 9 x 18 km), Kamchatka Peninsula, Russia; 325–175 ka^[44] 20 km³ (4.8 cu mi) of ignimbrite deposits.^[45]
• Diamante Caldera–Maipo volcano complex (size: 20 x 16 km), Argentina-Chile; 450 ka; 450 cubic kilometers (108 cu mi) of tephra.^[4][46]
• Yellowstone hotspot; Yellowstone Caldera (size: 45 x 85 km); 640 ka; VEI 8; more than 1,000 cubic kilometers (240 cu mi) of tephra (Lava Creek Tuff)^[6]
• Three Sisters (Oregon), USA; Tumalo volcanic center; with eruptions from 600–700 to 170 ka years ago
• Uinkaret volcanic field, Arizona, USA; the Colorado River was dammed by lava flows multiple times from 725 to 100 ka.^[47]
• Mono County, California, USA; Long Valley Caldera; 758.9 ka ±1.8; VEI 7; 600 cubic kilometers (144 cu mi) of Bishop Tuff.^[4][48]
• Valles Caldera, New Mexico, USA; 1.25 Ma; VEI 7; around 600 cubic kilometers (144 cu mi) of the Tshirege Member (Upper Bandelier Tuff) eruption.^{[4][49][50][51]}
• Sutter Buttes, Central Valley of California, USA; were formed over 1.5 Ma by a now-extinct volcano.
• Valles Caldera, New Mexico, USA; 1.61 Ma; VEI 7; over 500 cubic kilometers (120 cu mi) of the Otowi Member (Lower Bandelier Tuff) eruption.^[51]
• Ebisutoge-Fukuda tephras, Japan; 1.75 Ma; 380 to 490 cubic kilometers (91.2 to 117.6 cu mi) of tephra.^[4]
• Yellowstone hotspot; Island Park Caldera (size: 100 x 50 km); 2.1 Ma; VEI 8; 2,450 cubic kilometers (588 cu mi) of Huckleberry Ridge Tuff.^[4][6]
• Cerro Galán (size: 32 km wide), Catamarca Province, northwestern Argentina; 2.2 Ma; VEI 8; 1,050 cubic kilometers (252 cu mi) of Cerro Galán Ignimbrite.^[52]

Large Neogene eruptions

Pliocene eruptions

See also: List of large volume volcanic eruptions in the Basin and Range Province

Approximately 5.332 million years BP, the Pliocene epoch begins. Most eruptions before the Quaternary period have an unknown VEI.

Santa Rosa-Calico

Virgin Valley

McDermitt

Black Mountain

Silent Canyon

Timber Mountain

Stonewall

Long Valley

Lunar Crater

Nevada/ California:
Volcanism locations.

Cochetopa

La Garita

Lake City

Platoro

Dotsero

Colorado volcanism. Links: La Garita, Cochetopa and North Pass (North Pass), Lake City, and Dotsero.

Valles

Socorro

Potrillo

Zuni-Bandera

Carizzozo

New Mexico volcanism. Links: Valles, Socorro, Potrillo, Carrizozo, and Zuni-Bandera.

• Boring Lava Field, Boring, Oregon, USA; the zone became active at least 2.7 Ma, and has been extinct for about 300,000 years.^[53]
• Norfolk Island, Australia; remnant of a basaltic volcano active around 2.3 to 3 Ma.^[54]
• Pastos Grandes Caldera (size: 40 x 50 km), Altiplano-Puna volcanic complex, Bolivia; 2.9 Ma; VEI 7; more than 820 cubic kilometers (197 cu mi) of Pastos Grandes Ignimbrite.^[55]
• Little Barrier Island, northeastern coast of New Zealand's North Island; it erupted from 1 million to 3 Ma.^[56]
• Mount Kenya; a stratovolcano created approximately 3 Ma after the opening of the East African rift.^[57]
• Pacana Caldera (size: 60 x 35 km), Altiplano-Puna Volcanic Complex, northern Chile; 4 Ma; VEI 8; 2,500 cubic kilometers (600 cu mi) of Atana Ignimbrite.^[58]
• Frailes Plateau, Bolivia; 4 Ma; 620 cubic kilometers (149 cu mi) of Frailes Ignimbrite E.^[4][59]
• Cerro Galán (size: 32 km wide), Catamarca Province, northwestern Argentina; 4.2 Ma; 510 cubic kilometers (122 cu mi) of Real Grande and Cueva Negra tephra.^[4]
• Yellowstone hotspot, Heise volcanic field, Idaho; Kilgore Caldera (size: 80 x 60 km); VEI 8; 1,800 cubic kilometers (432 cu mi) of Kilgore Tuff; 4.45 Ma ±0.05.^[4][60]
• Khari Khari Caldera, Frailes Plateau, Bolivia; 5 Ma; 470 cubic kilometers (113 cu mi) of tephra.^[4]

Miocene eruptions

The final eruptions in the creation of Banks Peninsula in New Zealand occurred about 9 million years ago.

A major eruption of Gran Canaria took place around 14 million years ago.

Approximately 23.03 million years BP, the Neogene period and Miocene epoch begin.

• Cerro Guacha, Bolivia; 5.6–5.8 Ma (Guacha ignimbrite).^[61]
• Lord Howe Island, Australia; Mount Lidgbird and Mount Gower are both made of basalt rock, remnants of lava flows that once filled a large volcanic caldera 6.4 Ma.^[62]
• Yellowstone hotspot, Heise volcanic field, Idaho; 5.51 Ma ±0.13 (Conant Creek Tuff).^[60]
• Yellowstone hotspot, Heise volcanic field, Idaho; 5.6 Ma; 500 cubic kilometers (120 cu mi) of Blue Creek Tuff.^[4]
• Cerro Panizos (size: 18 km wide), Altiplano-Puna Volcanic Complex, Bolivia; 6.1 Ma; 652 cubic kilometers (156 cu mi) of Panizos Ignimbrite.^[4][63]
• Yellowstone hotspot, Heise volcanic field, Idaho; 6.27 Ma ±0.04 (Walcott Tuff).^[60]
• Yellowstone hotspot, Heise volcanic field, Idaho; Blacktail Caldera (size: 100 x 60 km), Idaho; 6.62 Ma ±0.03; 1,500 cubic kilometers (360 cu mi) of Blacktail Tuff.^[4][60]
• Pastos Grandes Caldera (size: 40 x 50 km), Altiplano-Puna Volcanic Complex, Bolivia; 8.3 Ma; 652 cubic kilometers (156 cu mi) of Sifon Ignimbrite.^[4]
• Manus Island, Admiralty Islands, northern Papua New Guinea; 8–10 Ma
• Banks Peninsula, New Zealand; Akaroa erupted 9 Ma, Lyttelton erupted 12 Ma.^[64]
• Mascarene Islands were formed in a series of undersea volcanic eruptions 8–10 Ma, as the African plate drifted over the Réunion hotspot.
• Yellowstone hotspot, Twin Fall volcanic field, Idaho; 8.6 to 10 Ma.^[65]
• Yellowstone hotspot, Grey's Landing Supereruption, Idaho; 8.72 Ma, 2,800 cubic kilometers (672 cu mi) of Grey's Landing Ignimbrite.^[66]
• Yellowstone hotspot, McMullen Supereruption, Idaho; 8.99 Ma, 1,700 cubic kilometers (408 cu mi) of volcanic material^[66]
• Yellowstone hotspot, Picabo volcanic field, Idaho; 10.21 Ma ± 0.03 (Arbon Valley Tuff).^[60]
• Mount Cargill, New Zealand; the last eruptive phase ended some 10 Ma. The center of the caldera is about Port Chalmers, the main port of the city of Dunedin. Much of the caldera is filled by Otago Harbour.^[67][68][69]
• Yellowstone hotspot, Idaho; Bruneau-Jarbidge volcanic field; 10.0 to 12.5 Ma (Ashfall Fossil Beds eruption).^[65]
• Anahim hotspot, British Columbia, Canada; has generated the Anahim Volcanic Belt over the last 13 million years.
• Yellowstone hotspot, Owyhee-Humboldt volcanic field, Nevada/ Oregon; around 12.8 to 13.9 Ma.^[65][70]
• Tejeda Caldera, Gran Canaria, Spain; 13.9 Ma; the 80 km3 eruption produced a composite ignimbrite (P1) of rhyolite, trachyte and basaltic materials, with a thickness of 30 metres at 10 km from the caldera center^[71]
• Gran Canaria shield basalt eruption, Spain; 14.5 to 14 Ma; 1,000 km3 of tholeiitic to alkali basalts^[72]
• Campi Flegrei, Naples, Italy; 14.9 Ma; 79 cubic kilometers (19 cu mi) of Neapolitan Yellow Tuff.^[4]
• Huaylillas Ignimbrite, Bolivia, southern Peru, northern Chile; 15 Ma ±1; 1,100 cubic kilometers (264 cu mi) of tephra.^[4]
• Yellowstone hotspot, McDermitt volcanic field (North), Trout Creek Mountains, Whitehorse Caldera (size: 15 km wide), Oregon; 15 Ma; 40 cubic kilometers (10 cu mi) of Whitehorse Creek Tuff.^[4][73]
• Yellowstone hotspot (?), Lake Owyhee volcanic field; 15.0 to 15.5 Ma.^[74]
• Yellowstone hotspot, McDermitt volcanic field (South), Jordan Meadow Caldera, (size: 10–15 km wide), Nevada/ Oregon; 15.6 Ma; 350 cubic kilometers (84 cu mi) Longridge Tuff member 2–3.^{[4][65][73][75]}
• Yellowstone hotspot, McDermitt volcanic field (South), Longridge Caldera, (size: 33 km wide), Nevada/ Oregon; 15.6 Ma; 400 cubic kilometers (96 cu mi) Longridge Tuff member 5.^{[4][65][73][75]}
• Yellowstone hotspot, McDermitt volcanic field (South), Calavera Caldera, (size: 17 km wide), Nevada/ Oregon; 15.7 Ma; 300 cubic kilometers (72 cu mi) of Double H Tuff.^{[4][65][73][75]}
• Yellowstone hotspot, McDermitt volcanic field (South), Hoppin Peaks Caldera, 16 Ma; Hoppin Peaks Tuff.^[76]
• Yellowstone hotspot, McDermitt volcanic field (North), Trout Creek Mountains, Pueblo Caldera (size: 20 x 10 km), Oregon; 15.8 Ma; 40 cubic kilometers (10 cu mi) of Trout Creek Mountains Tuff.^[4][73][76]
• Yellowstone hotspot, McDermitt volcanic field (South), Washburn Caldera, (size: 30 x 25 km wide), Nevada/ Oregon; 16.548 Ma; 250 cubic kilometers (60 cu mi) of Oregon Canyon Tuff.^[4][73][75]
• Yellowstone hotspot (?), Northwest Nevada volcanic field (NWNV), Virgin Valley, High Rock, Hog Ranch, and unnamed calderas; West of Pine Forest Range, Nevada; 15.5 to 16.5 Ma.^[77]
• Yellowstone hotspot, Steens and Columbia River flood basalts, Pueblo, Steens, and Malheur Gorge-region, Pueblo Mountains, Steens Mountain, Washington, Oregon, and Idaho, USA; most vigorous eruptions were from 14 to 17 Ma; 180,000 cubic kilometers (43,184 cu mi) of lava.^{[4][78][79][80][81][82][83][84]}
• Mount Lindesay (New South Wales), Australia; is part of the remnants of the Nandewar extinct volcano that ceased activity about 17 Ma after 4 million years of activity.
• Oxaya Ignimbrites, northern Chile (around 18°S); 19 Ma; 3,000 cubic kilometers (720 cu mi) of tephra.^[4]
• Pemberton Volcanic Belt was erupting about 21 to 22 Ma.^[85]

Volcanism before the Neogene

See also: List of large volume volcanic eruptions in the Basin and Range Province

Distribution of selected hotspots. The numbers in the figure are related to the listed hotspots on Hotspot (geology).

• Paleogene ends 23 million years ago.
  • The formation of the Chilcotin Group basalts occurs between 10–6 million years ago.
  • The formation of the Columbia River Basalt Group occurs between 17 and 6 million years ago.
  • La Garita Caldera erupts in the Wheeler Geologic Area, Central Colorado volcanic field, Colorado, USA, eruption several VEI 8 events (Possibly as high as a VEI 9), 5,000 cubic kilometers (1,200 cu mi) of Fish Canyon Tuff was blasted out in a single, major eruption about 27.8 million years ago.^[52][86][87]
  • Unknown source in Ethiopia erupts 29 million years ago with at least 3,000 cubic kilometers (720 cu mi) of Green Tuff and SAM.^[4]
  • Sam Ignimbrite in Yemen forms 29.5 million years ago, at least 5,550 cubic kilometers (1,332 cu mi) of distal tuffs associated with the ignimbrites.^[88]
  • Jabal Kura’a Ignimbrite in Yemen forms 29.6million years ago, at least 3,700 cubic kilometers (888 cu mi) of distal tuffs associated with the ignimbrites.^[88]
  • The Ethiopian Highlands flood basalt begins 30 million years ago
• About 33.9 million ago, the Oligocene epoch of the Paleogene period begins
  • The Mid-Tertiary ignimbrite flare-up begins 40 million years ago and lasts until 25 million years ago.
  • Bennett Lake Volcanic Complex erupts 50 million years ago with a VEI 7 850 cubic kilometers (204 cu mi) of tephra.^[89]
  • Canary hotspot is believed to have first appeared about 60 million years ago.
  • Formation of the Brito-Arctic province begins 61 million years ago
  • Réunion hotspot, Deccan Traps, India, formed between 60 and 68 million years ago which are thought to have played a role in the Cretaceous–Paleogene extinction event.
  • The Louisville hotspot has produced the Louisville Ridge, it is active for at least 80 million years. It may have originated the Ontong Java Plateau around 120 million years ago.
  • Hawaii hotspot, Meiji Seamount is the oldest extant seamount in the Hawaiian-Emperor seamount chain, with an estimated age of 82 million years.
  • The Kerguelen Plateau begins forming 110 million years ago.
  • The Rahjamal Traps form from 117 to 116 million years ago.
  • The Ontong Java Plateau forms from 125 to 120 million years ago
  • Paraná and Etendeka traps, Brazil, Namibia and Angola form 128 to 138 million years ago. 132 million years ago, a possible supervolcanic eruption occurred, ejecting 8,600 cubic kilometers (2,063 cu mi).^[90]
  • Formation of the Karoo-Ferrar flood basalts begins 183 million years ago.
• The flood basalts of the Central Atlantic magmatic province are thought to have contributed to the Triassic–Jurassic extinction event about 199 million years ago.
• The Siberian Traps are thought to have played a significant role in the Permian–Triassic extinction event 252 million years ago.
  • Formation of the Emeishan Traps began 260 million years ago.
• The Late Devonian extinction occurs about 374 million years ago.
• The Ordovician–Silurian extinction event occurs between 450 and 440 million years ago.
  • Glen Coe, Scotland; VEI 8; 420 million years ago
  • Scafells, Lake District, England; VEI 8; Ordovician (488.3–443.7 million years ago).
  • Flat Landing Brook; VEI 8, A Supervolcanic eruption occurred 466 million years ago, as it erupted in one of the largest explosive volcanic eruptions known in Earth's history with a volume of ejecta at around 2,000–12,000 cubic kilometers (480–2,879 cu mi).
• The Phanerozoic eon begins 539 million years ago.^[91]
  • Midcontinent Rift System of North America begins forming 1,000 million years ago.
  • Mackenzie Large Igneous Province forms 1,270 million years ago.
  • Mistassini dike swarm and Matachewan dike swarm form 2,500 million years ago.
  • Blake River Megacaldera Complex forms 2,704–2,707 million years ago.^[92]
• Approximately 2,500 million years ago, the Proterozoic eon of the Precambrian period begins
• About 3,800 million years ago, the Archean eon of the Precambrian period begins

Notes

• The Mackenzie Large Igneous Province contains the largest and best-preserved continental flood basalt terrain on Earth.^[93] The Mackenzie dike swarm throughout the Mackenzie Large Igneous Province is also the largest dike swarm on Earth, covering an area of 2,700,000 km² (1,000,000 sq mi).^[94]
• The Bachelor (27.4 Ma), San Luis (27–26.8 Ma), and Creede (26 Ma) calderas partially overlap each other and are nested within the large La Garita (27.6 Ma) caldera, forming the central caldera cluster of the San Juan volcanic field, Wheeler Geologic Area, La Garita Wilderness. Creede, Colorado and San Luis Peak (Continental Divide of the Americas) are nearby. North Pass Caldera is northeastern the San Juan Mountains, North Pass. The Platoro volcanic complex lies southeastern of the central caldera cluster. The center of the western San Juan caldera cluster lies just west of Lake City, Colorado.
• The Rio Grande rift includes the San Juan volcanic field, the Valles Caldera, the Potrillo volcanic field, and the Socorro-Magdalena magmatic system.^[95] The Socorro Magma Body is uplifting the surface at approximately 2 mm/year.^[96][97]
• The southwestern Nevada volcanic field, or Yucca Mountain volcanic field, includes: Stonewall Mountain caldera complex, Black Mountain Caldera, Silent Canyon Caldera, Timber Mountain – Oasis Valley caldera complex, Crater Flat Group, and Yucca Mountain. Towns nearby: Beatty, Mercury, Goldfield.^[98] It is aligned as a Crater Flat volcanic field, Réveille Range, Lunar Crater volcanic field, Zone (CFLC).^[99] The Marysvale Volcanic Field, southwestern Utah is nearby too.
• McDermitt volcanic field, or Orevada rift volcanic field, Nevada/ Oregon, nearby are: McDermitt, Trout Creek Mountains, Bilk Creek Mountains, Steens Mountain, Jordan Meadow Mountain (6,816 ft), Long Ridge, Trout Creek, and Whitehorse Creek.
• Emmons Lake stratovolcano (caldera size: 11 x 18 km), Aleutian Range, was formed through six eruptions. Mount Emmons, Mount Hague, and Double Crater are post-caldera cones.^[6]
• The topography of the Basin and Range Province is a result of crustal extension within this part of the North American Plate (rifting of the North American craton or Laurentia from Western North America; e.g. Gulf of California, Rio Grande rift, Oregon-Idaho graben). The crust here has been stretched up to 100% of its original width.^[100] In fact, the crust underneath the Basin and Range, especially under the Great Basin (includes Nevada), is some of the thinnest in the world.
• Topographically visible calderas: South part of the McDermitt volcanic field (four overlapping and nested calderas), West of McDermitt; Cochetopa Park Caldera, West of the North Pass; Henry's Fork Caldera; Banks Peninsula, New Zealand (Photo) and Valles Caldera. Newer drawings show McDermitt volcanic field (South), as five overlapping and nested calderas. Hoppin Peaks Caldera is included too.
• Repose periods: Toba (0.38 Ma),^[39] Valles Caldera (0.35 Ma),^[101][102] Yellowstone Caldera (0.7 Ma).^[103]
• Kiloannum (ka), is a unit of time equal to one thousand years. Megaannum (Ma), is a unit of time equal to one million years, one can assume that "ago" is implied.

Volcanic explosivity index (VEI)

Main article: Volcanic explosivity index

VEI and ejecta volume correlation

VEI	Tephra Volume (cubic kilometers)	Example
0	Effusive	Masaya Volcano, Nicaragua, 1570
1	>0.00001	Poás Volcano, Costa Rica, 1991
2	>0.001	Mount Ruapehu, New Zealand, 1971
3	>0.01	Nevado del Ruiz, Colombia, 1985
4	>0.1	Eyjafjallajökull, Iceland, 2010
5	>1	Mount St. Helens, United States, 1980
6	>10	Mount Pinatubo, Philippines, 1991
7	>100	Mount Tambora, Indonesia, 1815
8	>1000	Yellowstone Caldera, United States, Pleistocene

       

Volcanic dimming

Main article: Global dimming

The global dimming through volcanism (ash aerosol and sulfur dioxide) is quite independent of the eruption VEI.^{[104][105][106]} When sulfur dioxide (boiling point at standard state: -10 °C) reacts with water vapor, it creates sulfate ions (the precursors to sulfuric acid), which are very reflective; ash aerosol on the other hand absorbs ultraviolet.^[107] Global cooling through volcanism is the sum of the influence of the global dimming and the influence of the high albedo of the deposited ash layer.^[108] The lower snow line and its higher albedo might prolong this cooling period.^[109] Bipolar comparison showed six sulfate events: Tambora (1815), Cosigüina (1835), Krakatoa (1883), Agung (1963), and El Chichón (1982), and the 1808 mystery eruption.^[110] And the atmospheric transmission of direct solar radiation data from the Mauna Loa Observatory (MLO), Hawaii (19°32'N) detected only five eruptions:^[111]

• June 11, 2009, Sarychev Peak (?), Kuril Islands, 400 tons of tephra, VEI 4
  • 48°05′30″N 153°12′0″E
• June 12–15, 1991 (eruptive climax), Mount Pinatubo, Philippines, 11,000 ±0.5 tons of tephra, VEI 6
  • Global cooling: 0.5 °C,^[112] 15°08′0″N 120°21′0″E
• March 28, 1982, El Chichón, Mexico, 2,300 tons of tephra, VEI 5
  • 17°21′36″N 93°13′40″W
• October 10, 1974, Volcán de Fuego, Guatemala, 400 tons of tephra, VEI 4
  • 14°28′22″N 90°52′49″W
• February 18, 1963, Mount Agung, Lesser Sunda Islands, 100 tons of lava, more than 1,000 tons of tephra, VEI 5
  • Northern Hemisphere cooling: 0.3 °C,^[113]8°20′30″S 115°30′30″E

 

But very large sulfur dioxide emissions overdrive the oxidizing capacity of the atmosphere. Carbon monoxide's and methane's concentration goes up (greenhouse gases), global temperature goes up, ocean's temperature goes up, and ocean's carbon dioxide solubility goes down.^[1]

• 
  Location of Mount Pinatubo, showing area over which ash from the 1991 eruption fell.
• 
  Satellite measurements of ash and aerosol emissions from Mount Pinatubo.
• 
  MLO transmission ratio - Solar radiation reduction due to volcanic eruptions
• 
  NASA, Global Dimming - El Chichon, VEI 5; Pinatubo, VEI 6.
• 
  Sulfur dioxide emissions by volcanoes. Mount Pinatubo: 20 million tons of sulfur dioxide.
• 
  TOMS sulfur dioxide from the June 15, 1991 eruption of Mount Pinatubo.
• 
  Sarychev Peak: the sulphur dioxide cloud generated by the eruption on June 12, 2009 (in Dobson units).

Map gallery

• 
  Yellowstone sits on top of four overlapping calderas. (US NPS)
• 
  Diagram of Island Park and Henry's Fork Caldera.
• 
  Harney Basin, Steens Mountain, Owyhee and Malheur River.^[83]
• 
  Steens Mountain, McDermitt volcanic field and Oregon/ Nevada stateline.
• 
  Location of Yellowstone Hotspot in Millions of Years Ago.
• 
  Snake River Plain, image from NASA's Aqua satellite, 2008
• 
  Location of Yucca Mountain in southern Nevada, to the west of the Nevada Test Site.
• 
  Jemez Ranger District and Jemez Mountains, Santa Fe National Forest.

See also

• Decade Volcanoes – Set of sixteen volcanoes noted for their eruptive history and proximity to densely populated areas
• Dense-rock equivalent – Volcanologic calculation to estimate eruption volume
• Volcanic winter of 536 – Cooling period in Northern Hemisphere caused by volcanic eruptions
• Geologic timeline of Western North America
• Hotspot (geology) – Volcanic region hotter than the surrounding mantle
• List of largest volcanic eruptions
• List of volcanoes in Iceland
• List of volcanoes in Mexico
• List of volcanoes in Papua New Guinea
• Lists of volcanoes
• Ring of Fire – Region around the rim of the Pacific Ocean where many volcanic eruptions and earthquakes occur
• Stratospheric sulfur aerosols – Putting particles in the stratosphere to reflect sunlight to limit global heatingPages displaying short descriptions of redirect targets
• Supervolcano – Volcano that has had an eruption with a volcanic explosivity index (VEI) of 8
• Trans-Mexican Volcanic Belt – Active volcanic belt that covers central-southern Mexico
• Volcanic arc – Chain of volcanoes formed above a subducting plate
• Volcanic explosivity index – Predictive Qualitative scale for explosiveness of volcanic eruptions
• Volcanic winter – Temperature anomaly event caused by a volcanic eruption
• Year Without a Summer – 1816 volcanic winter climate event

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Further reading

• Ammann, Caspar M.; Philippe Naveau (6 March 2003). "Statistical analysis of tropical explosive volcanism occurrences over the last 6 centuries" (PDF). Geophysical Research Letters. 30 (5): 1210. Bibcode:2003GeoRL..30.1210A. doi:10.1029/2002GL016388. S2CID 135288077. Archived from the original (PDF) on 26 July 2011. Retrieved 19 March 2010.
• Froggatt, P.C.; Lowe, D.J. (1990). "A review of late Quaternary silicic and some other tephra formations from New Zealand: their stratigraphy, nomenclature, distribution, volume, and age". New Zealand Journal of Geology and Geophysics. 33 (1): 89–109. Bibcode:1990NZJGG..33...89F. doi:10.1080/00288306.1990.10427576. hdl:10289/176.
• Lipman, P.W. (September 30, 1984). "The Roots of Ash Flow Calderas in Western North America: Windows Into the Tops of Granitic Batholiths". Journal of Geophysical Research. 89 (B10): 8801–8841. Bibcode:1984JGR....89.8801L. doi:10.1029/JB089iB10p08801.
• Mason, Ben G.; Pyle, David M.; Oppenheimer, Clive (2004). "The size and frequency of the largest explosive eruptions on Earth". Bulletin of Volcanology. 66 (8): 735–748. Bibcode:2004BVol...66..735M. doi:10.1007/s00445-004-0355-9. S2CID 129680497.
• Newhall, Christopher G.; Dzurisin, Daniel (1988). "Historical unrest at large calderas of the world". USGS Bulletin 1855. p. 1108. Archived from the original on 2009-05-12.
• Siebert L.; Simkin T. (2002). "Volcanoes of the World: an Illustrated Catalog of Holocene Volcanoes and their Eruptions". Digital Information Series (GVP-3). Smithsonian Institution, Global Volcanism Program. Archived from the original on 2012-10-24.).
• Simkin T. & Siebert L. (1994). Volcanoes of the World. Geoscience Press, Tucson, 2nd edition. p. 349. ISBN 978-0-945005-12-4.
• Simkin T. & Siebert L. (2000). "Earth's volcanoes and eruptions: an overview". In Sigurdsson, H. (ed.). Encyclopedia of Volcanoes. San Diego: Academic Press. pp. 249–261.
• Simkin, T.; Siebert L.; McClelland L.; Bridge D.; Newhall C.; Latter J.H. (1981). Volcanoes of the World: A Regional Directory, Gazetteer, and Chronology of Volcanism During the Last 10,000 Years. Hutchinson-Ross, Stroudsburg, Pennsylvania. pp. 232. ISBN 978-0-87933-408-6.
• Stern, Charles R. (December 2004). "Active Andean volcanism: its geologic and tectonic setting". Revista Geológica de Chile. 31 (2): 161–206. doi:10.4067/S0716-02082004000200001.
• United States Geological Survey; Cascades Volcano Observatory, Vancouver, Washington; Index to CVO online volcanoes
  • Map: Tom Simkin, Robert I. Tilling, Peter R. Vogt, Stephen H. Kirby, Paul Kimberly, and David B. Stewart, Third Edition (Published 2006) interactive world map of Volcanoes, Earthquakes, Impact Craters, and Plate Tectonics
• Ward, Peter L. (2 April 2009). "Sulfur Dioxide Initiates Global Climate Change in Four Ways" (PDF). Thin Solid Films. 517 (11): 3188–3203. Bibcode:2009TSF...517.3188W. doi:10.1016/j.tsf.2009.01.005. Archived from the original (PDF) on 20 January 2010. Retrieved 2010-03-19.
  • Supplementary Table I: "Supplementary Table to P.L. Ward, Thin Solid Films (2009) Major volcanic eruptions and provinces" (PDF). Teton Tectonics. Archived from the original (PDF) on 2010-01-20. Retrieved 2010-03-16.
  • Supplementary Table II: "Supplementary References to P.L. Ward, Thin Solid Films (2009)" (PDF). Teton Tectonics. Archived from the original (PDF) on 2010-01-20. Retrieved 2010-03-16.

External links

• Volcano World Information
• Volcano Live, John Seach
• Holocene Volcanoes in Kamchatka
• Reference Database of the International Association of Volcanology (XLS file)
• Reference Database of Chemistry of the Earth’s Interior (XLS file)
• Volcanic sulfate record in the GISP2 core (ftp protocol)