Vulcano (Sicily)

Last updated
Vulcano
Gran Cratere e Lipari.JPG
The Gran Cratere on Vulcano Island, in the middle of the Vulcanello, in the background Lípari
Highest point
Prominence 386 m (1,266 ft)
Coordinates 38°24′18″N14°57′36″E / 38.405°N 14.96°E / 38.405; 14.96
Geography
Vulcano (Sicily)
Location Lipari, Messina, Sicilia, Italy
Parent range Aeolian Arch
Geology
Last eruption 1890

Vulcano is a complex stratovolcano in the Mediterranean. It is the eponymous volcanic complex comprising the island of Vulcano in the Aeolian archipelago. The origin of the word volcano is derived from the name of this volcanic island, which in turn owes its name to the Roman god of fire, volcanoes, and metalworking, Vulcan, who in classical Roman mythology resided on this island. [1]

Contents

Geology

This volcanic complex was created due to the African plate subducting under the Eurasian plate. Vulcano’s central peak is 386 meters above sea level. It is visible from the ground as a hill in the island's center, near Porto Levante. The slope’s composition is of various types (sandy landscape, porous pumice-type formations, and the presence of more glassy oxydian-type remnants). The vegetation cover decreases as altitude increases. Around half-way up the hill, only gorse grows; near the main crater, the ground is completely bare. [2]



Volcanic epochs

Volcanic activity at Vulcano can be split up into 8 different eruptive Epochs:

Summary of Eruptive Epochs reconstructed for Vulcano Island eruptive history [3]
Eruptive EpochSynthemAGE (Time Span)Active volcanic centres (lithosomes)Synthetic description
Eruptive Epoch 1Paleovulcano (informal unit)127–113 ka ca.(1)Capo Secco (small shield volcano) Effusive eruptions
Eruptive Epoch 2Casa Grotta dell’Abate117–101 ka ca.(1)Primordial Vulcano (Serro di Punta Lunga stratovolcano)Effusive to subordinate Strombolian activity, with minor phreatomagmatic eruptions
Eruptive Epoch 3Scoglio dell’Arpa99.5–94 ka ca.(1)Scoglio Conigliara caldera ring faultsMainly effusive activity and subordinate phreatomagmatic eruptions (PDC)
Eruptive Epoch 4Rio Grande83–78 ka ca.(1)Monte Aria and Timpa del Corvo fissures (mostly located along the rims of Piano Caldera); Casa Petrulla scoria cone Effusive activity producing lava piles; phreatomagmatic dilute PDCs interlayered with Strombolian fallout deposits
Eruptive Epoch 5Il Piano70–42 ka ca.(1)Il Cardo, Monte Rosso, Punta Luccia, La Sommata (tuff‑cones or scoria cones)Dilute PDC activity alternated to minor Strombolian fallout; effusive and/or pure Hawaiian to Strombolian activity
Eruptive Epoch 6Serra delle Felicicchie28–21 ka ca.(1)Monte Lentia dome field (“Lentia group”, Keller 1980; “Lentia complex”, De Astis et al. 1997b) and other vents, originating various: P. Sciarra del Monte, Sc. Capo Secco, P.ta Bandiera, Faro vecchioVarious effusive and explosive (Quadrara Fm.) western border activities generating lava domes and coulees, scoriae/pumices blankets, lava flow
Eruptive Epoch 7Vallonazzo (Menichedda sub‑synthem)< 21 ka to 10 ka ca.(1)La Fossa caldera (LFC) borders and inner vents, Punta Roja, Monte LentiaMedium‑ to high‑energy PDC (Piano Grotte dei Rossi Fm. ≡ Upper Brown Tuffs (2)); effusive activity (domes, lava flows)
Eruptive Epoch 8Vallonazzo (Porto di Levante sub‑synthem)from 9–8 ka to the last eruption (1888–1890 AD) (1)Mt. Saraceno, LFC western (small domes and lava flow), La Fossa tuff‑cone, Vulcanello cone(s)Frequent phreatomagmatic eruptions with both Vulcanian style (low‑energy PDC and fallout) or PDC‑dominated (La Fossa cone and inside LFC: i.e. final units of Upper Brown Tuffs). Strombolian to Hawaiian and effusive activity (Mt. Saraceno, Vulcanello, La Fossa). Dome‑type activity (LFC border)


A 2025 study shows Vulcano has multiple magma chambers. The study integrated petrological and gas‑monitoring data to reconstruct the pre‑eruptive cycles of Vulcano. The study analysed clinopyroxene crystals from the 1888–90 La Fossa eruption and SO₂ flux records since 1978. This identified three different pulses of mafic magma (low silica) recharges—about 85–140, 16–35 and 2–7 years before an eruption. This estimates that 26–86 × 10⁶ m³ of magma intruded beneath the crater between 1978 and 2024. This pressurized the shallow magma reservoirs. The study describes Vulcano’s magma system as polybaric, with magma storage at 18.5–21 km depth, shoshonitic reservoirs at 17–12 km, latitic reservoirs at 12–8 km, latitic–trachytic reservoirs from roughly 7–8 km down to ~2 km, and small rhyolitic chambers shallower than 2 km. A latitic reservoir at around 4–5 km depth is currently degassing and is periodically recharged by deeper magmas. The study concludes that prolonged magma recharge and interaction among these reservoirs are key triggers for Vulcano‑style eruptions. [4]

Great Pit Crater

The main crater, about 500 metres (1,600 ft) in diameter, is named “Great Pit Crater”, but is also called the “Grand Crater”. The rim is located at an elevation of 386 metres (1,266 ft), but is surrounded by slopes leading to greater heights (Lentia Mountains). [5]

Other craters

In the vicinity of the Great Pit Crater, there are the remains of two other craters:

  1. Old Vulcano is located to the south: it includes the two peaks of Mount Saraceno and Mount Aria, which reach altitudes of around 500 metres (1,600 ft). This is the original volcanic edifice, still the highest in the entire complex.
  2. The Lentia, to the northwest, is much smaller: the Fossa crater was formed from the interior of this crater.

In addition to the Grand Crater, Old Vulcano, and the Lentia, there is a peripheral complex. Next to the island of Vulcano are the cones of Volcanello  [ it ], joined to the island of Vulcano by an isthmus called the Isthmus of Vulcano  [ it ]. [2]

Recorded history

Vulcano in ancient times

Geographic location Mappa Eolie.PNG
Geographic location

Vulcano has produced half a dozen devastating eruptions over the past millennia. The Fossa crater has been active at irregular intervals since ancient times, as documented by classical writers, particularly Thucydides in the fifth century B.C. During this time period, records suggest the island produced eruptions that were audible as far as Sicily. After centuries of irregular eruptions, the Fossa crater began a prolonged phase of dormancy. [6]

Eruption of 1889 Vulcano in 1889.jpg
Eruption of 1889

In the second century B.C., next to the island of Vulcano, the new crater of Vulcanello emerged from the sea, which, erupting, gave rise to a small island located next to the mother island. The eruption causing the creation of Vulcanello, was also documented in antiquity in a dramatic style. The dormancy of the Great Crater was recorded as lasting until the sixth century A.C. [1]

Vulcano in modern times

Between 1727 and 1739, the activity of the Grand Crater resumed; following this eruptive awakening, the lava flow of fired stones (obsidian) was observed. Spilled ash fell on Lipari, Salina, Stromboli, and the Sicilian coast opposite. Further eruptions are also documented in 1771 and 1783. [6]

Fumaroles of Vulcano Fumarola, Vulcano, Sicilia, Italia, 2015.gif
Fumaroles of Vulcano

The last eruption occurred between 1888 and 1890. The latter was heralded in 1886 by a phreatic eruption (i.e., caused by steam formed as a result of water heating). The last eruptions in this series were of the Vulcano type: so-called bread crust bombs (solidified lava) and ash were catapulted from the Great Crater. An expedition of researchers was organized by the government. In particular, the eruption was documented by the famous seismologist Mercalli. [7]

Current Unrest

Boulders near fumaroles, with a yellow patina of sulfur Vulcano.sassi.jpg
Boulders near fumaroles, with a yellow patina of sulfur

Since the time of the last violent eruption, only fumarole activity has been recorded volcanic exhalations consisting of the production of steam and volcanic gases. In the case of Vulcano, it is mainly sulfur, which, thanks to the action of bacteria, contributes to the formation of a colored patina on the surfaces of soil and stones. [8]

The activity of fumaroles has been documented for centuries and has continued in alternating phases to the present day. While it was very modest in the 1970s, there was increased activity at the turn of the 1980s and 1990s that raised serious concerns. [8]

On the beach at Porto Levante, the water and mud are heated by the heat of sulfur dioxide produced by the weaker fumaroles. This small coastal area has long been famous for bathing: mud baths on Vulcano have a reputation for benefiting the skin and having therapeutic effects. [9]

Starting in the summer of 2021 and that of September, there has been an increase in fumarole activity, with a rise in the temperature of the gases and the amount of CO2 and SO2 in them, as well as an increase in microseismic activity. For this reason, the Civil defense  [ it ] raised the volcanic alert level from green to yellow starting in October. Following a subsequent decrease in these phenomena, the alert level was returned to green in December 2023. [7]

In the fall of 2025, volcanic unrest increased again with strong gas emissions reported on October 15, 2025. [10]

Excursions

The ascents to the peaks of Vulcano are typically done on foot, starting from Porto Levante. Ascents to the Grand Crater for people in average physical condition typically do not require much effort nor a guide. Elderly people and people sensitive to sulfurous gases have complained about the difficulty of reaching the peak. It is frequently advised to avoid getting near the fumaroles. Before the descent back down to Porto Levante, there is an option to have a guided tour around the crater. [9]

See also

References

  1. 1 2 "Vulcano" [Vulcano]. ingv.it (in Italian). 24 July 2024. Retrieved February 18, 2025.
  2. 1 2 "Vulcano" [Vulcano]. ingvvulcani.com (in Italian). Retrieved February 18, 2025.
  3. ↑ Selva, J. (2020). "Multiple hazards and paths to eruptions: A review of the volcanic system of Vulcano (Aeolian Islands, Italy)". Earth‑Science Reviews. 207: 7. doi:10.1016/j.earscirev.2020.103186.
  4. ↑
  5. ↑ "La Sicilia in Rete!" [Sicily on the Web!]. sicilyweb.com (in Italian). Retrieved February 18, 2025.
  6. 1 2 "Le Isole Eolie" [Aeolian Islands]. palermoweb.com (in Italian). Retrieved February 18, 2025.
  7. 1 2 "Isola di Vulcano: disposto il livello di allerta verde" [Vulcano Island: green alert level ordered]. protezionecivile.gov.it (in Italian). Retrieved February 18, 2025.
  8. 1 2 "Cosa succede a Vulcano?" [What happens to Vulcano?]. ingvvulcani.com (in Italian). October 2021. Retrieved February 18, 2025.
  9. 1 2 "Protezione civile: allerta gialla per il vulcano dell'isola di Vulcano" [Civil defense: yellow alert for the Vulcano on the island of Vulcano]. protezionecivile.gov.it (in Italian). Retrieved February 18, 2025.
  10. ↑ Martin (14 October 2025). "Vulcano volcano (Eolian Islands, Italy): strong degassing". Volcano Discovery. Retrieved 19 October 2025.
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