Etna is under Italian Civil Protection Yellow alert. Summit explosive activity and degassing continue. Conditions can change rapidly — follow INGV and Civil Protection guidance.
Etna
A vast, continually evolving volcanic system — where lava fountains, crater collapses, ash clouds and centuries of human life share the same mountain.
Europe's restless giant
Etna is not defined by one crater or one eruption style. It is one of the most studied volcanoes on Earth — a complex, permanently active system whose summit, flanks and internal plumbing are in a state of continual change.
Rising above the eastern coast of Sicily, Etna covers approximately 1,250 km² and reaches roughly 3,320–3,400 metres above sea level — a figure that shifts as summit eruptions build new material and collapses remove it. It is Europe's largest active volcano by volume and, across its 500,000-year history, one of the longest-documented volcanic systems anywhere on the planet.
Most of its output is basaltic, which allows magma to produce lava flows, lava fountains and Strombolian explosions rather than the catastrophic explosive columns of more silica-rich volcanoes. But basaltic does not mean predictable. Etna can shift rapidly between quiet summit degassing, sustained effusive phases, energetic fountain episodes, and the short, violent bursts known as paroxysms — sometimes within hours.
Its significance is also deeply human. Farms, vineyards, towns, roads, ski lifts and one of Sicily's major airports share its slopes and surroundings. Communities have adapted to centuries of activity, but lava, ash, earthquakes and rapidly evolving summit conditions remain an active part of life on the volcano's flanks.
How it works
The four summit craters
Etna's summit is a cluster of four distinct crater areas — not one central opening — each with its own history, character and current activity level.
The North-East Crater formed in 1911 and was for decades the highest point on the volcano. It is associated with sustained Strombolian activity and major paroxysmal fountain sequences, and often dominates infrasonic and tremor records during active phases.
Voragine — "the chasm" — is the oldest of the four, active since at least the 16th century. It is capable of the most violent behaviour: the December 2015 paroxysmal sequence from Voragine sent eruptive columns to 15 km above sea level, the highest from Etna in decades.
Bocca Nuova formed in 1968 as a collapse pit adjacent to Voragine. It comprises two interconnected pit craters and is a persistent source of degassing and occasional ash emissions. It and Voragine are sometimes grouped as the central craters.
The South-East Crater complex — born from an eruptive fissure in 1971 — is now the youngest, largest and most active summit area. It has been the primary source of paroxysmal lava fountain episodes since the 1990s, producing more than 50 in 2021 alone, and growing substantially with each eruptive cycle.
Fire and snow
Few volcanoes display contrast as dramatically as Etna: glowing fountains rising above snowfields, black lava cutting through white slopes, and ski lifts operating within sight of active craters.
Etna's elevation produces heavy winter snowfall while magma remains active a few kilometres below. Snow and ice can melt around hot deposits, conceal unstable terrain and complicate emergency access. The visual effect is extraordinary, but it is also part of the hazard environment — meltwater interacting with magma can generate phreatomagmatic explosions more violent than dry eruptions of the same scale.
This duality extends to the human landscape. The same fertile volcanic soils that support world-class viticulture on the lower flanks are the product of thousands of years of ash and lava deposits. The mountain gives and threatens at the same time — something the communities around Etna have understood for as long as they have been here.
Watching a mountain in motion
INGV's Osservatorio Etneo in Catania operates one of the world's most comprehensive volcano-monitoring networks. The challenge is not simply detecting activity — it is distinguishing Etna's restless background from meaningful escalation signals that require a public response.
Eruptions through history
Origins beneath the sea
Etna's earliest phase produced tholeiitic basalts through submarine fissural eruptions. As the edifice grew and breached sea level, the eruption style shifted and magma composition began its long evolution toward the alkali basalts erupted today.
First recorded eruptions
INGV's DANTE database — the most comprehensive record of Etna's eruptive history — lists documented eruptions dating to at least 1500 BCE. Greek and Roman writers recorded later events: Pindar wrote of the volcano, and Empedocles of Akragas was said to have studied it directly.
The most destructive eruption in recorded history
A catastrophic SW-flank fissure eruption created the Monti Rossi cinder cones and sent lava flows more than 15 km downslope. Flows breached the walls of Catania, destroyed villages, and reached the Ionian Sea across more than 40 km². One of the earliest attempts to divert lava artificially was made during this event.
Mascali destroyed
A flank eruption on the northern slopes overwhelmed the town of Mascali, destroying it entirely — a stark demonstration of the threat posed when magma breaks out far below the summit, giving little warning to downslope communities.
The longest flank eruption of the 20th century
Over 473 days, lava advanced toward Zafferana Etnea, prompting one of the most ambitious lava-diversion operations in European history — including the use of explosives to breach a lava tube. The flows stopped just short of the town.
Flank eruptions and infrastructure damage
Two eruptions in quick succession damaged ski and tourist facilities, produced widespread ash affecting Catania airport, and opened simultaneous vents on both north and south flanks during the 2002–03 event.
Voragine's record-breaking paroxysms
Intense activity from Voragine generated eruptive columns reaching 15 km above sea level — the highest from Etna in decades — with lava fountains visible across much of eastern Sicily and ash reaching the Greek islands.
Fifty paroxysms in a single year
The South-East Crater complex entered an extraordinary phase of repeated short-duration paroxysmal episodes — more than 50 in 2021 alone — building the crater complex substantially and repeatedly disrupting Catania airport with ashfall.
Continued summit and effusive activity
Voragine grew further during intense 2024 activity, at times reclaiming the title of highest point on the volcano. New sub-terminal effusive vents have opened on the upper flanks, and summit explosive activity with periodic ash emissions continues under Yellow alert.
Main hazards
Lava flows
The most consistent long-term hazard. Flank eruptions — where magma breaks out well below the summit — give far less warning than summit activity and can threaten towns and infrastructure directly. Major destructive flank events occurred in 1669, 1928, 1971, 1983, 1991–93, 2001 and 2002–03.
Ash and tephra
Ash, lapilli and coarser ballistic material from summit paroxysms regularly affects communities downwind. Catania Fontanarossa Airport is repeatedly disrupted by ashfall — one of the most economically significant impacts of Etna's activity on the region.
Pyroclastic density currents
Less frequent than lava flows but potentially lethal. PDCs can be generated by dome collapse, explosive summit events or lava-flow-front destabilisation. Valle del Bove channels most products away from populated areas, but significant events can travel further.
Earthquakes and faulting
Volcanic earthquakes beneath the edifice frequently precede or accompany eruptions. The 2018 M4.8 event caused significant damage to eastern-flank communities. The broader regional setting also generates damaging tectonic earthquakes — the 1693 event near Etna remains one of Italy's deadliest.
Volcanic gas
SO₂ and CO₂ can reach dangerous concentrations near active vents and be blown toward inhabited areas. Summit access is frequently restricted during high-gas episodes. SO₂ plumes regularly affect communities as far away as the Sicilian coast and mainland Italy.
Flank instability
Etna's eastern flank is slowly sliding toward the Ionian Sea under gravity — monitored continuously by INGV using GPS and InSAR. Accelerating movement or a major detachment event could trigger flank collapse and potentially generate a Mediterranean tsunami. A low-probability, high-consequence scenario requiring ongoing surveillance.
Europe's restless giant
"Etna never feels finished. Its craters rise, collapse and rebuild; lava redraws the slopes; snow covers yesterday's deposits; and communities continue life beneath it. No other volcano in Europe shows the Earth's capacity for creation and disruption with such regularity, such accessibility, or such beauty."
This editorial summary reflects the scientific information presented above. It does not replace official monitoring, access restrictions or public-safety guidance from INGV, Italian Civil Protection and local authorities. Always consult official sources before visiting the volcano.
Etna explained
What is Etna's current alert level?
Italian Civil Protection currently lists Etna at Yellow alert — indicating a level of volcanic imbalance or elevated activity requiring attention. Yellow does not mean an eruption is imminent. For the current official picture always check INGV Osservatorio Etneo and Italian Civil Protection directly.
Is Etna always erupting?
Etna is almost never truly quiet — some level of degassing, seismic activity or low-level summit explosions is typical background behaviour. What varies dramatically is intensity and style: from quiet fumarolic activity to major lava fountain episodes producing columns tens of kilometres high.
How high is Mount Etna?
Etna's summit elevation is not fixed. Paroxysmal eruptions build new material while collapses and erosion remove it. Recent measurements generally place the highest point at roughly 3,320–3,400 metres, but this changes after every significant eruptive episode. INGV surveys the summit morphology by drone after major events.
Why does Etna produce so much ash?
Explosive fragmentation during lava fountains and Strombolian activity sends ash and lapilli into prevailing winds, which regularly carry them across eastern Sicily and occasionally to the Italian mainland, the Balkans and North Africa. The scale of ash production is closely linked to magma supply rate and gas content during each episode.
Can lava reach towns?
Yes — and it has. Historic flank eruptions have destroyed entire settlements, including Mascali in 1928. Most modern activity remains high on the volcano, but a major unexpected flank eruption is considered the most serious threat to downslope communities. Lava diversion using earthworks and, historically, explosives has been attempted during threatening events.
What is a paroxysm?
A short, high-intensity summit episode involving rapid escalation to intense lava fountaining, a tall ash-and-gas column, and rapid tephra fallout over a wide area — often ending as abruptly as it began. Etna produced more than 50 paroxysmal episodes in 2021 alone, mostly from the South-East Crater complex.
Who monitors Etna?
INGV's Osservatorio Etneo (OE) in Catania operates the scientific monitoring networks — seismic, infrasound, GPS, InSAR, gas, thermal and visual. Italian Civil Protection manages alert levels and emergency coordination. INGV-OE publishes multiparametric weekly bulletins every Monday, and issues VONA notices to aviation authorities when significant ash occurs.
What is Valle del Bove?
A large horseshoe-shaped depression on Etna's eastern flank, several kilometres across, that exposes the volcano's internal layered structure and acts as a natural receptacle for lava flows erupting from the summit. Its presence has historically directed lava away from the most populated western and southern flanks.
What makes Etna scientifically unusual?
Etna's magma composition and location do not fit neatly into any of the three classical models for volcano formation — it is not a typical subduction volcano, hotspot or rift-zone system. A 2026 study proposed it may be the world's first known giant petit-spot volcano, fed by mantle pockets squeezed upward at ~80 km depth as the plate bends into the subduction zone. Its longevity, output and accessibility make it one of the most-studied volcanoes on Earth.
Can visitors climb Etna?
Access to higher elevations depends on volcanic activity, weather conditions and official restrictions. Guided ascents to the summit craters require authorised guides and may be suspended at any time. Lower-elevation areas and crater rim viewpoints are generally accessible, but visitors should always check current access conditions with official authorities before visiting.
Why does the summit height keep changing?
Each significant eruptive episode deposits new scoria, lava and ash at or near the summit craters, building them higher — while collapse events, heavy rain and erosion can remove material just as quickly. Voragine, the North-East Crater and the South-East Crater complex have each held the title of highest point on Etna at different times in recent years.
Where are official updates published?
INGV Osservatorio Etneo publishes weekly multiparametric bulletins, VONA aviation notices and news updates at ct.ingv.it. Italian Civil Protection publishes the national alert level and risk information. These are the only authoritative sources for Etna's current status.
Official science, made readable
This profile uses INGV publications, Italian Civil Protection information and authoritative eruption records as its only factual sources. Editorial passages explain the significance of what is observed while keeping official monitoring data and safety guidance clearly attributed and separate. No news outlet, social media or aggregator site is used as a factual source.