The 1906 Vesuvius eruption

Deadliest incident of the 20th century

A dramatic colour postcard image of the 1906
eruption seen from the Bay of Naples

One of the most violent eruptions in the history of Mount Vesuvius reached its peak on this day in 1906, killing probably in excess of 200 people.

The volcano, most famous for the 79AD eruption that buried the city of Pompeii and may have claimed  between 13,000 to 16,000 victims, had been spewing lava for almost 11 months, treating the residents of nearby Naples to regular fireworks displays.

On 5 April, 1906, an indication that a major eruption was imminent came in a failure in the water supply drawn from wells on the mountain sides, with such water as was still flowing having a strong taste of sulphur. The expulsions of lava became more explosive and an ash cloud began to form in the sky above the crater.

In the preceding days, there had been an earthquake on the island of Ustica some 130km (81 miles) away, which was thought to be connected to the Vesuvius eruption.

On the evening of 7 April came the biggest explosion, as well as three earthquakes felt in the city of Naples, which were said to cause much panic, but no particular damage.

A photograph taken from Naples shows the huge
cloud of ash that plunged the city into darkness

That could not be said of some of the villages at the foot of the mountain, in particular Boscotrecase, on the southeast slope, which was effectively obliterated by a stream of lava as tall as a house and wide as a river.

For a while, there were fears that the ruins of Pompeii and the coastal city of Torre Annunziata - built on the ruins of Oplonti, another Roman city destroyed in 79AD - would suffer the same fate. Mercifully, the lava stopped short.

The 1906 eruption, which came to be known as the Grand Eruption, ejected the most lava of any eruption of which there are reliable records but it was the massive volume of ash rising from the crater that caused most of the deaths, estimated at between 100 and 200, with some reports suggesting as many as 216 casualties. It would remain the deadliest eruption of the 20th century.

The mountain itself was covered in a deep layer of grit and ashes, understandably. But for miles around, as far away as the plain of Sorrento and the island of Capri, buildings, trees and fields were coated in what looked like a fall of dirty snow. In the city of Naples itself, scientists calculated that some 315,000 tons of burning dust fell to earth, leaving streets and gardens unrecognisable.

The biggest single loss of life was in the village of San Giuseppe, to the east of the crater, where people crowded into a little church, imagining it would be a place of safety, only for the roof to fall in from the weight of ash. Many neighbouring houses suffered a similar fate. In neighbouring Ottojano - Ottoviano today - many poorly constructed houses were destroyed.

Vesuvius - or Monte Somma - as it appeared 
before the 1906 eruption blew off its cone

In Naples itself, the roof of the market of Monte Oliveto, in the old part of the city near the Spanish Quarter, also collapsed from the weight of ash, causing considerable loss of life. 

Residents who escaped serious injury had to contend with the threat to their eyes of falling cinder, prompting a busy trade in protective glasses and umbrellas.

The streets of the city were effectively in darkness for several days until a shift in the wind direction allowed the sunlight to shine through again.  Residents offered thanks to San Gennaro, the patron saint of the city, for deliverance. 

All the time there was a sense of chaos as 150,000 residents fled villages in the immediate vicinity of the mountain and descended on Naples, while the railway station was besieged by overseas visitors to the city, mainly German, English and American, trying to board trains out of the area.

The rescue efforts were shared between the army and the Carabinieri, who won much praise for their tireless work in digging among the rubble for survivors and clearing away a landslide that blocked the Circumvesuviana railway line. The royal commander of the army, the Duke of Aosta, visited in person with his wife, the popular Princess Hélène, to rally troops and raise the spirits of residents.

The people of Naples gave thanks also to Professor Raffaele Vittorio Matteucci, director of the Vesuvius Laboratory, who stayed at his post for as long as possible, despite the danger of being burnt or asphyxiated, to pass on vital warnings to citizens of what was to come.

The consequences of the catastrophe were not limited to damage to buildings and loss of life.  The cost of repairing the damage and looking after the thousands made homeless inevitably fell to the government in Rome, who had to abandon their plans to host the Olympic Games in 1908 on the grounds that they could no longer justify the expense.

The Games instead went to London, with Rome obliged to wait another 52 years, until 1960, to host Italy’s only summer Olympics to date.

After the eruption, Vesuvius itself - also known as Monte Somma - had a different appearance, losing its cone and around 170m (558ft) in height.

The ruins of Pompeii - with Vesuvius in the 
background - attract thousands of visitors 

Travel tip:

The excavated ruins of Pompeii - gli scavi - are among the most popular tourist attractions in Italy and many important artefacts have been dug up. When Vesuvius started rumbling in August 79AD and a sinister cloud began to form above it, some people left the area immediately. It is believed those who stayed died from the effects of the heat and their bodies were buried under the stones and ash for hundreds of years. Engineers rediscovered them while digging an aqueduct. The first organised excavations began in 1748 and the site soon became an attraction for wealthy Europeans on the Grand Tour.  Trains from the Circumvesuviana railway station in Naples run to Sorrento every half an hour, stopping at Pompei Scavi station. From the station it is a short walk to the main entrance to the archaeological site in Piazza Porta Marina. The ruins are open daily from 8.30 to 19.30 during the summer and from 8.30 to 17.00 between November and April.

Hotels in Pompei by Booking.com

The ruins of the Villa Oplontis, part of the city
destroyed by the 1906 Vesuvius eruption

Travel tip:

Torre Annunziata, which escaped the worst of the 1906 eruption, was destroyed in the eruption of 79AD, when it was known as Oplonti. The present-day city was rebuilt over the ruins. Its name derives from a watch tower - torre - built to warn people of imminent Saracen raids and a chapel consecrated to the Annunziata (Virgin Mary). It became a centre for pasta production in the early 19th century. The Villa Poppaea, also known as Villa Oplontis, believed to be owned by Nero, was discovered about ten metres below ground level just outside the town and is now a UNESCO World Heritage Site.

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Also on this day:

1763: The birth of musician Domenico Dragonetti

1794: The birth of operatic tenor Giovanni Battista Rubini

1973: The birth of footballer Marco Delvecchio

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Etna’s biggest eruption

Sicily volcano spewed lava for four months

Eruptions are a regular occurrence on the Mount Etna
volcano - this spectacular shot was taken in January this year

The largest eruption of the Mount Etna volcano in recorded history began on this day in 1669.

After several days of seismic activity in the area, a fissure measuring two metres wide and about 9km (5.6 miles) long opened up on the southeastern flank of the Sicilian mountain in the early hours of 11 March.

The lava that was spewed out of the enormous gash continued to flow for four months until the eruption was declared to be over on 16 July, a duration of 122 days.

Although stories of 20,000 deaths as a result of the eruption have been dismissed as myth, with no recorded evidence of any casualties, an estimated 15 towns and villages were destroyed as well as hundreds of buildings in the city of Catania, and some 27,000 people are thought to have been made homeless.

Mount Etna is situated in the northeastern vertex of the triangular island of Sicily. The most active volcano in Europe, it looms over the coastal city of Catania, which has a population within its metropolitan area of more than 1.1 million.  It has a long history of eruptions, first documented in 396BC, when it reportedly thwarted an advance on Syracuse by the Carthanaginians. 

Etna looms large over the port city of Catania,
with the outskirts just 15km from the summit

The 1669 eruption began after a period of intense seismic activity, with accounts of steam and gas rising from the summit to greater heights than normal. A number of earthquakes took place on the evening of 10 March before the first of several fissures in the mountainside appeared shortly after midnight. More opened up in the course of the next day.

The wide stream of molten lava made for a spectacular sight after nightfall but it destroyed every settlement in its path, while other buildings collapsed under the weight of boulders and ash.  Villages up to 5km (3.1 miles) away were covered by up to 12cm (4.7ins) of ash and ash deposits were recorded in Calabria on the Italian mainland, and even as far away as Greece.

Catania itself began to come under threat just over a week after the first rupture appeared on the southeastern flank but volcanologists believe the progress of the lava slowed when it reached a lake and consequently did not reach the walls of the city until around 16 April, having travelled about 15km (9.3 miles).

Some accounts have it that Catania was destroyed but it is thought now that, while many buildings near the boundary were severely damaged, most of the city was left intact.  Although the walls were eventually breached by the lava, it took a further 15 days for that to happen, and the barrier they presented was enough to divert the main flow towards the Ionian Sea.  

The 1669 eruption is captured in art by Giacinto
Platania in a fresco in Catania's duomo

The evacuation of the city was considered, but thanks to barriers being constructed within the walls from the remains of buildings that had been destroyed, the lava advanced only about another 200m.

Where Catania did suffer was from an influx of homeless refugees, up to 20,000 in number, swarming in from settlements razed to the ground by the lava, whose presence led to a breakdown of law and order and caused the artisan classes and the aristocracy to flee.

It is thought that the confusion over the extent of damage and casualties may be because Catania was hit by a further natural catastrophe only 24 years later when an earthquake and tsunami killed up to 60,000 Sicilians, including a third of the population of Catania.

In fact, only 77 deaths have been recorded in Etna’s entire known history, largely because its activity is generally well anticipated and its lava eruptions slow enough to allow residents to escape to safety.

Etna's eruptions attract thousands of visitors for
their spectacular nighttime views

Travel tip:

Mount Etna’s regular eruptions make for spectacular sights, particularly after night has fallen, while the mountain dominates the region even during its periods of relative quiet.  It has a base diameter of 40km (25 miles) and is more than 3,330m (10,825ft) tall, although its height varies depending on activity.  Despite its high level of activity, tourist excursions to see the craters and to appreciate the diversity of flora and fauna at the lower levels are very popular. Visitors must be mindful that temperatures at elevated levels are much colder than at sea level even in the height of summer. Indeed, during the winter months, a number of the mountainside villages become ski resorts.

Catania's beautiful Basilica
della Collegiata

Travel tip:

The city of Catania, which is located on the east coast of Sicily facing the Ionian Sea, is one of the ten biggest cities in Italy, and the seventh largest metropolitan area in the country, with a population including the environs of 1.12 million. Twice destroyed by earthquakes, in 1169 and 1693, it can be compared in some respects with Naples, which sits in the shadow of Vesuvius, in that it lives with the constant threat of a natural catastrophe.  As such it has always been a city for living life to the full. In the Renaissance, it was one of Italy's most important cultural, artistic and political centres and enjoys a rich cultural legacy today, with numerous museums and churches, theatres and parks and many restaurants.  It is also notable for many fine examples of the Sicilian Baroque style of architecture, including the beautiful Basilica della Collegiata, with its six stone columns and the concave curve of its façade.

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Also on this day:

1544: The birth of poet Torquato Tasso

1847: The birth of politician Sidney Sonnino

1851: The opera Rigoletto premieres in Venice

1924: The birth of psychiatrist Franco Basaglia

(Picture credits: Etna looming over Catania by notiziecatania from Pixabay; Basilica della Collegiata by Luca Aless via Wikimedia Commons)

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Giuseppe Mercalli - seismologist

Giuseppe Mercalli became southern Europe's biggest
authority on earthquakes and volcanic activity

Scientist who invented Mercalli Scale died in fire

The seismologist and volcanologist Giuseppe Mercalli, who at the time of his death was director of the Vesuvius Observatory, died in a fire at his home in Naples on this day in 1914.

The initial suspicion was that Mercalli, who devised a scale for determining the strength of earthquakes according to the intensity of shaking, had knocked over a paraffin lamp accidentally after falling asleep while working late.

However, an examination of his remains suggested by may have been strangled after disturbing an intruder, who then soaked his clothes in petrol before setting light to them. A sum of money worth the equivalent of $1,400 (€1,250) today was missing, although no one was ever apprehended for the crime.

Born in Milan, Mercalli was ordained a Roman Catholic priest and became a professor of Natural Sciences at the seminary of Milan, although he left under something of a cloud because of his support for Antonio Rosmini, a controversial priest and philosopher who campaigned for social justice and was fiercely critical of various aspects of how the Roman Catholic church operated.

Mercalli collecting data on the edge of the crater of Vesuvius,
with an aide on hand to keep him from falling

After he had left, the Italian government appointed him a professor at Domodossola in Piedmont, followed by a post at Reggio di Calabria. He was professor of geology at the University of Catania in the late 1880s and was given a post at the Naples University in 1892. He became director of the Vesuvius Observatory in 1911.

He is best remembered for the Mercalli intensity scale for measuring earthquakes which, in modified form, is still used today.

While studying seismic activity in Italy in the late 19th century, Mercalli’s access to seismic instrumentation was limited. Most of Mercalli's information came from personal accounts and observations of damage. To provide consistency in his analyses, he decided he needed a way to measure the relative effects of each event.

He first developed a scale with six degrees, with the most disastrous earthquakes given an intensity of six, but felt that this did not provide enough precision.  Another intensity scale called the deRossi-Forel scale that was gaining in prominence at the same time had the advantage of 10 degrees of intensity, although Mercalli felt it lacked meaningful description.

Mercalli was ordained as a priest before
beginning his scientific career

In 1902, Mercalli modified this 10-degree scale to include the detail he desired, and his new scale quickly caught on among European scientists

Mercalli also observed eruptions of the volcanoes Stromboli and Vulcano in the Aeolian Islands and his descriptions of these eruptions became the basis for two indices in the Volcanic Explosivity Index: 1 - Strombolian eruption, and 2 - Vulcanian eruption.

The scale has been tweaked by various other seismologists but remains the basis for determining an earthquake’s intensity. It is now known as the Modified Mercalli Intensity Scale.

Mercalli also engaged in detailed cataloguing of Italian earthquakes, which enabled him to produce a book - I vulcani e fénomeni vulcanici in Italia - which he used to assemble a clear picture of where most of the events happened.

Mercalli's work built his reputation across southern Europe, and he was often called upon to study events throughout the continent.  He travelled to Spain in 1884 to examine the aftermath of the Andalusian earthquake, and in 1887 Mercalli was the lead investigator of the deadly event in Imperia along the French and Italian Riviera.

He became famous even beyond scientific circles, to the extent that his death and the speculation over the circumstances was reported in the New York Times.

Some fascinating buildings line Piazza Mercato in the
medieval heart of Domodossola

Travel tip:

The name Domodossola is familiar to many Italian children as a line - ‘D’ is for Domodossola - recited in learning the alphabet at school. It is, in fact, a very pleasant town in northern Piedmont, close to the border with Switzerland and the last town at the Italian end of the Simplon Pass and the Simplon railway tunnel. Domodossola has a charming medieval centre around the Piazza Mercato, which has a number of interesting buildings. The Collegiale Church of Santi Gervasio and Protasio is the town’s most important church, while just outside the town is the Sacro Monte Calvario, a Roman Catholic sanctuary that is a UNESCO World Heritage site. The Palazzo Silva in Piazza Chiossi houses a civic museum. The area is surrounded by outstanding Alpine countryside, which can be admired from a light railway linking Domodossola and Locarno in Switzerland.

Domodossola hotels by Booking.com

The vast crater of Mount Vesuvius, which remains classified
as an active volcano despite being quiet since 1944

Travel tip:

The Vesuvius Observatory today is part of the Mount Vesuvius National Park, which was created in 1955. The crater of the volcano itself is accessible to visitors, albeit by guided tour only, and there is a road to within 200 metres of it, but after that the ascent is on foot only.  The crater is about 200 metres deep and has a maximum diameter of about 600 metres. The climb is said to be well worth it because the view takes in the entire coastline from the Gulf of Gaeta, some 84km (52 miles) to the north, to the Sorrento peninsula. Visitors can take the Naples-Sorrento line of the Circumvesuviana railway and get off at Ercolano station, from where a shuttle bus runs to the park. As well as the observatory, there is a museum, a visitor centre, a restaurant and a shop where you can buy Lacrima Christi del Vesuvio, the wine made from the grapes grown on the sloped of the volcano.

More reading:

1944 - the last Vesuvius eruption

How Italy's worst earthquake almost destroyed Messina and Reggio Calabria

The devastating quake that led to an architectural golden age

Also on this day:

1661: The birth of Venetian composer Francesco Gasparini, who gave Vivaldi a job

1923: The birth of cartoonist Benito Jacovitti

1943: The birth of politician Mario Monti, who was Italy’s prime minister from 2011 to 2013

(Picture credits: Mercalli on slopes of Vesuvius by Sailko; Domodossola by Little Joe; Vesuvius crater by S J Pinkney)

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Vesuvius erupts

Terrible toll of Europe's worst volcanic catastrophe 

A nightmarish vision of the AD 79 eruption is conveyed in
this painting by the 19th century British artist, John Martin

Mount Vesuvius erupted on this day in AD 79, burying the Roman cities of Pompeii, Herculaneum, Oplontis and Stabiae and causing the deaths of thousands of people.

An eyewitness account of the eruption, in which tons of stones, ash and fumes were ejected from the volcano, has been left behind for posterity by a Roman administrator and poet, Pliny the Younger, who described the event in his letters to the historian Tacitus.

Although there were at least three large eruptions of Vesuvius before AD 79 and there have been many since, the disaster in August AD 79 is considered the most catastrophic volcanic eruption in European history.

Mount Vesuvius had thrown out ash the day before and many people had left the area. But in the early hours of the morning of August 25, pyroclastic flows of hot gas and rock began to sweep down the mountain.

The flows were fast moving and knocked down all the structures in their path, incinerating or suffocating the people who had remained. Pliny noted there were also earth tremors and a tsunami in the Bay of Naples.

The remains of about 1500 people have been found at Pompeii and Herculaneum (Ercolano) but it is not known what percentage this represents of the overall death toll.

The crater of Vesuvius as it is today

Pompeii dates back to at least the seventh century BC and came under Roman rule around 200 BC. The city was almost completely covered after the eruption but the upper floors of some of the buildings stuck out from the rubble. These were looted by local people over the centuries until eventually the city was forgotten. Engineers rediscovered it while digging an aqueduct in the 17th century. The first organised excavations began in 1748 and the site soon became an attraction for wealthy Europeans on the Grand Tour.

After AD 79, eruptions occurred at a rate of one or two every century, culminating in a very busy period between 900 and 1073 in which there are records of eight eruptions.  After 1150, the volcano became relatively quiet for almost 500 years, with activity so infrequent that vineyards and shrubbery covered the whole mountain.

But in 1631 the peace was shattered by a major eruption, burying several villages under lava flows and resulting in many casualties. After that, Vesuvius continued to erupt every few years.

A dramatic image of the 1944 eruption, taken from
a US military aircraft

More recently, an eruption in March 1944 destroyed three villages and about 80 planes belonging to the US Army Air Forces, which were based at an airfield close by. American military personnel took photographs of the eruption, which have been useful for experts to analyse.

Since 1944 Vesuvius has been uncharacteristically quiet, although it is constantly monitored for activity and an evacuation plan is in place. Experts believe seismic activity would give them between 14 and 20 days notice of an impending eruption.

The volcano remains a concern because of the same geological factors that make the Italian peninsula so prone to earthquakes, as has been confirmed so tragically this week in the Apennine mountains north of Rome, with the destruction of the town of Amatrice and other communities.

Travel tip:

Tourists can visit the volcano inside Mount Vesuvius National Park, which was created in 1955. The crater is accessible to visitors and there is a road to within 200 metres of it, but after that the ascent is on foot only.  The crater is about 200 metres deep and has a maximum diameter of about 600 metres. The climb is said to be well worth it because the view takes in the entire coastline from the Gulf of Gaeta, some 84 kilometres to the north, to the Sorrento peninsula. Visitors can take the Naples-Sorrento line of the Circumvesuviana railway and get off at Ercolano station, from where a shuttle bus runs to the park. There is an observatory, a museum, a visitor centre, a restaurant and a shop where you can buy Lacrima Christi del Vesuvio, the wine made from the grapes grown on the volcano. You have to sign up for a guided tour to actually get close to the crater.

The ruins of Pompeii, with Vesuvius in the distance as a
constant reminder of the Roman city's history

Travel tip:

One of the most popular tourist attractions in Italy, gli scavi - the excavated ruins of Pompeii - show us what daily life was like in a Roman city, even down to what was sold in the shops and how people decorated their homes. A large number of important artefacts have been unearthed on the site in the last 250 years since excavations began properly. To get there take the Circumvesuviana railway and get off at Pompeii Scavi-Villa dei Misteri station. It is a short walk to the main entrance of the site in Piazza Porta Marina. From there walk along Via Marina to il Foro Civile (the forum) where orators addressed public meetings and law courts were held. Along Via del Mercurio there are interesting houses, including Casa dei Vettii, where there are well preserved wall paintings. Along Via dell’Abbondanza are the remains of shops, a tavern and even a brothel. At the end of the street you will find the main anfiteatro (ampitheatre). There is a self service bar and restaurant near the Tempio di Giove.  The excavations are open daily from 8.30 to 19.30 during the summer and 8.30 to 17.00 between November and April.

More reading:

Vesuvius - the 1944 eruption

(Photo of Vesuvius crater by S J Pinkney CC BY 2.0)

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Mount Vesuvius – the 1944 eruption

The last time the volcano was seen to blow its top

A dramatic picture of American B-25 Mitchell bombers
circling Vesuvius during the 1944 eruption

Mount Vesuvius, the huge volcano looming over the bay of Naples, last erupted on this day in 1944.

Vesuvius is the only volcano on mainland Europe to have erupted during the last 100 years and is regarded as a constant worry because of its history of explosive eruptions and the large number of people living close by.

It is most famous for its eruption in AD 79, which buried the Roman cities of Pompeii and Herculaneum and is believed to have killed thousands of people.

An eyewitness account of the eruption, in which tons of stones, ash and fumes were ejected from the cone, has been left behind for posterity by Pliny the Younger in his letters to the historian, Tacitus.

There were at least three larger eruptions of Vesuvius before AD 79 and there have been many since. In 1631 a major eruption buried villages under lava flows and killed about 300 people and the volcano then continued to erupt every few years.

Smoke billows from Vesuvius in this picture taken from
San Sebastiano al Vesuvio, a village destroyed by lava

The eruption which started on 18 March 1944 and went on for several days destroyed three villages nearby and about 80 planes belonging to the US Army Air Forces, which were based at an airfield close to Pompeii. Some of the American military personnel took photographs of the eruption, which have been useful for today’s experts to analyse.

Since 1944 Vesuvius has been uncharacteristically quiet although it is constantly monitored for activity and an evacuation plan is in place. Experts believe seismic activity would give them between 14 and 20 days' notice of an impending eruption. 

The area was officially declared a national park in 1955. The crater is now open to visitors and there is access by road to within 200 metres of it, but after that the ascent is on foot only.

The crater is about 200 metres deep and has a maximum diameter of about 600 metres. The climb is said to be well worth it because the view from up there takes in the entire coastline from the Gulf of Gaeta to the Sorrento peninsula.

Travel tip:

The excavated ruins of Pompeii, gli scavi, are among the most popular tourist attractions in Italy and many important artefacts have been dug up. When Vesuvius started rumbling in August AD 79 and a sinister cloud began to form above it, some people left the area immediately. It is believed those who stayed died from the effects of the heat and their bodies were buried under the stones and ash for hundreds of years. Engineers rediscovered them while digging an acqueduct. The first organised excavations began in 1748 and the site soon became an attraction for wealthy Europeans on the Grand Tour.  Trains from the Circumvesuviana railway station in Naples run to Sorrento every half an hour, stopping at Pompei Scavi station. From the station it is a short walk to the main entrance to the archaeological site in Piazza Porta Marina. The ruins are open daily from 8.30 to 19.30 during the summer and from 8.30 to 17.00 between November and April.

Pompei hotels by Booking.com

The ruins of the forum at Pompeii with a now
dormant Vesuvius visible in the distance

Travel tip:

Highlights of the excavations at Pompeii include Casa dei Vettii, where there are well preserved wall paintings, Via dell’Abbon- danza, where you will see the remains of shops, a tavern and a brothel, the main amphitheatre and the Villa dei Misteri, which is outside the walls of the city and has some colourful wall paintings depicting the myth of Dionysis.

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