One of the world's largest active volcanoes, with a caldera measuring approximately 25 km across. Located on Kyushu island, it features multiple peaks and is popular with hikers — though its active nature demands constant monitoring.
One of the most active volcanoes in North America with over 30 periods of eruptions since 1585. The Colima volcanic complex dominates the western Mexican Volcanic Belt and remains closely monitored by scientists.
One of Indonesia's most persistently active volcanoes, Dukono on Halmahera has been erupting near-continuously since 1933. Daily ash plumes rise 300–700 m — extraordinary longevity that goes largely unnoticed due to its remote location.
Europe's tallest active volcano with one of the world's longest documented eruption records dating to 1500 BCE. Etna dominates Catania and is characterised by both continuous summit activity and occasional high-rate flank eruptions.
One of Central America's most active volcanoes, looming over Guatemala's former capital Antigua. Fuego is feared for its vigorous eruptions producing major ashfalls, pyroclastic flows and lava flows recorded continuously since 1524.
A stratovolcano in the central Aleutians erupting continuously since July 2021. Slow lava effusion has nearly filled the summit crater with no explosive activity since May 2021 — one of the longest ongoing eruptions in recent Alaskan history.
The Krýsuvík–Trölladyngja volcanic system on the Reykjanes Peninsula has been the site of repeated eruptions in recent years. Activity has reshaped the landscape around Grindavík and Svartsengi, with the most recent eruption concluding in August 2025.
A stratovolcano on Halmahera Island in near-continuous eruption since 2008. Extraordinarily active in 2026 with 641+ eruptions by May — nearly 4 per day — with ash plumes to 1,000 m. A paroxysmal eruption in January 2025 sent ash to 4 km.
The most active volcano on Negros Island, rising 2,465 m in the central Philippines. Since June 2024 it has produced moderately explosive eruptions generating PDCs, ash plumes to 4–5 km and ballistic projectiles, with eruptions recurring every few weeks to months.
A symmetrical stratovolcano on Lembata Island, active since 1660. The current eruptive episode began in 2020, briefly reaching Level 3 in early 2026 before moderating to daily white-to-gray plumes and seismically detected explosions at Level 2.
One of the world's most active volcanoes, Kīlauea has erupted episodically from Halemaʻumaʻu crater since December 2024. By June 2026 it has produced 49 episodes, with fountains exceeding 600–900 ft and fresh lava covering the crater floor.
One of the world's most perfectly symmetrical stratovolcanoes, Mayon has erupted over 50 times since 1616. Its 2,462 m cone dominates Albay Province with a 6 km Permanent Danger Zone enforced due to frequent lava flows and pyroclastic currents.
Indonesia's most active volcano and one of the most dangerous — feared for its deadly pyroclastic flows generated when lava domes collapse. Erupts on average every 5–10 years and is under constant scientific surveillance. Name means "the one making fire."
One of the world's most active volcanoes, Piton de la Fournaise completed an eruptive episode from February to April 2026, sending lava to the ocean and extending Réunion's coastline by 840 m. The volcano is currently at rest.
Costa Rica's "smoking mountain" hosts one of the world's most acidic crater lakes — a striking turquoise pool whose pH rivals battery acid. Frequent phreatic eruptions driven by superheated groundwater keep scientists and visitors on constant alert.
The highest peak in the Cascade Range at 4,392 m and 3rd highest volcanic threat in the USA. Mount Rainier's glacial ice cap poses a major lahar risk to the Puget Sound region, and it is extensively monitored despite no eruption since around 1894.
North America's second highest volcano, rising 70 km southeast of Mexico City. Its Aztec name means "smoking mountain" — an apt description for a glacier-clad giant with a history of major Plinian eruptions stretching back to pre-Columbian times.
The most active volcano in the Cascade Range and most likely to erupt again according to USGS. The catastrophic 1980 eruption killed 57 people and flattened 600 km² of forest, with dome-building eruptions following from 2004–2008.
New Zealand's most active volcano is a complex stratovolcano whose summit crater lake is a persistent hazard. Lahars from phreatic eruptions threaten nearby ski areas and river valleys. Low-level seismic unrest continues following the October 2022 eruption.
One of the world's most persistently active volcanoes, producing strong Strombolian to large ash explosions every 4–24 hours. Located just 8 km from the city of Kagoshima and half a million people, it is closely watched and frequently deposits ash on the city.
Also known as Chaparrastique, San Miguel's symmetrical cone is one of El Salvador's most recognisable landmarks and most active volcanoes. Flank eruptions have produced lava flows reaching the north, northeast and southeast since the 17th century.
One of Alaska's most active stratovolcanoes, rising 2,857 m on Unimak Island in the eastern Aleutians. Known for frequent Strombolian and sub-Plinian eruptions, Shishaldin has been in persistent unrest since 2023 and is closely watched across the North Pacific.
Java's highest and one of its most active volcanoes — also known as Mahameru (Great Mountain). Its ongoing activity since 1967 is characterised by frequent small-to-moderate summit explosions, occasional lava flows and pyroclastic events reaching the lower flanks.
The "Lighthouse of the Mediterranean" — Stromboli has been erupting almost continuously for at least 2,000 years. Famous for its regular small explosions throwing glowing lava from summit craters, lending its name to the Strombolian eruption style worldwide.
One of the Philippines' most active volcanoes — a caldera lake enclosing a volcanic island with its own crater lake. At least six eruptions since 1572 have claimed lives via pyroclastic flows and tsunamis across the lake.
Spain's highest peak and one of the world's largest volcanoes by volume. Teide experienced a seismic swarm beneath the Las Cañadas caldera in February 2026. No eruptive activity since 1909.
Three volcanic cycles produced some of the greatest eruptions in planetary history. The current 45 × 85 km caldera formed 640,000 years ago. Yellowstone's hydrothermal system — geysers, hot springs and fumaroles — remains intensely active.