Deception Island | Where Is It and Can You Travel There?

The breathtaking beauty of the Antarctic peninsula is not without its share of hidden turmoil. Beyond the glistening icebergs and the fascinating penguins, the region's unique geology consists of multiple active and inactive volcanoes. But, none is as unique as that of Deception Island.

At first glance, the island looks benign -  just a black mass of rock rising from the ocean. But with Deception Island, everything is not what it seems.

One interesting fact about Antarctica is that it has the southernmost active volcano on the planet- Mount Erebus. Deception Island is the second one of the two active volcanoes on the continent. While it is in the polar belt, the volcanic island is under a strong marine influence creating a unique ecosystem that fascinates researchers.

In all, Deception Island is a fascinating combination of natural beauty, geological significance, military, and whaling history. That makes it one of the most popular destinations among travellers to the white continent.

Where is Deception Island?

Deception Island is a part of the South Shetland Islands 105 kilometres from the Antarctic mainland and around 850 kilometres from the rocky headland of Cape Horn. Sitting in the middle of the infamous Drake Passage, this horseshoe-shaped island is around 14.5 kilometres in width. 

More than half the island is covered by glaciers and Mount Pond, the highest peak, rises to a height of 539 metres. The centre of the island creates a natural harbour, Port Foster, which is roughly 10 kilometres long and 7 kilometres wide. 

The only entrance to the bay is through a 500-metre-wide rocky passage called Neptune's Bellows - an easy-to-miss opening. The final sentry is a submerged rock right in the middle of the passage that was the cause of many shipwrecks after the island was discovered.

Why is it called Deception Island?

The origin of the name ‘Deception was due to its unique shape. From some angles, Deception looks like a normal island. Only when you pass through the entrance, the horseshoe shape becomes apparent. 

Then again, unlike typical volcanoes, Deception Island is not a mountain with a crater on top. Once you reach the centre of the bay, the actual deception becomes clear. You are on the flooded caldera of a volcano! Nowhere else in the world can a vessel sail right into an active volcano.

A massive eruption, occurring between 8,300 and 3,980 years BC, resulted in the collapse of the mountain’s top. This makes it appear as a normal island surrounded by cliffs. The volcano rises 1.4 kilometres from the sea bed and its basal diameter is 30 kilometres.

Interestingly, the eruptions and lava flow did not turn the glaciers on the island into steam. For this reason, the volcanic events on the island are classified as subglacial eruptions. 

Deception Island history

The history of Deception Island is a tale of fire and ice in reality. The rocky outcrops that form the outer periphery of the island rise from the blue sea - a dream-like view that would fit perfectly into a fantasy tale. 

These cliffs partly covered by white glaciers and partly by black volcanic ash effectively hide the secret of the island. From sea level, the island looks like a solid landmass surrounded by cliffs. 

The island was first sighted by British sealers in 1820. The name ‘Deception Island’ was coined by American sealer Nathaniel Palmer who first visited the bay in November 1820. 

The natural harbour on Deception Island offers protection against the rough storms of the Southern Ocean. Before the entrance through Neptune's Bellows was discovered, many ships likely sailed past it without discovering the shelter. 

With the harbour offering excellent wind protection, the island became a popular halting spot for ships involved in the fur-sealing industry. However, years of ruthless overhunting led to the devastation of the seal population in the South Shetlands. By 1825, Deception was abandoned by sailors.

Human activity restarted on the island during the early years of the 20th century as the whaling industry started large-scale operations. The reasons were the safety of the harbour and the abundant availability of freshwater. Extracting oil from the whale fat required huge volumes of freshwater, and the glaciers on the island were a rich water source.

Very soon, the island was hosting multiple whaling vessels during the southern summer with hundreds of men working on whale carcasses laid down on the beach. Structures like a radio station and a hand-operated railway were built. A cemetery was set up which remains the largest in Antarctica.

The rise in offshore whaling in 1925 led to the decline of commercial whaling operations on Deception Island. By 1931, the whaling operation on the island stopped entirely and the structures were abandoned.

Remnants of the grim past, like whaling equipment and rusted structures, are still visible on the island. You will also find bleached whale bones lying on the island’s shorelines. Whaler’s Bay, which was used by a Norwegian-Chilean whaling company, is now a historical site.

Volcanic activity

In the 19th century, eruptions of the volcano were observed in 1828 and 1842. Another period of eruption lasted from 1906 to 1912. The subsequent eruptions between the period 1967 and 1970 resulted in the abandonment of the British and Chilean Antarctic stations on the island. Even so, most of the recent activities were small-volume eruptions.

Some of the old buildings in Whaler's Bay were used by the British research station, ‘Base B’. The 1969 eruption caused a mudslide that buried the site and the British team left the island.

There are still many structures standing such as graveyards and airplane hangars that visitors can see. 

It is estimated the volcanic material was spread over 4500 kilometres during the earlier eruption which formed the caldera. A moderate volcanic eruption on the island can release massive volumes of ash that could cover a large portion of the skies in the southern hemisphere.

The rift zone

One hypothesis suggests that the area under South Shetlands is a rift zone - a place where Earth’s tectonic plates meet. So, this can be an example of rift-induced volcanism.

The entire region around the Antarctic Peninsula and the South Shetland Islands is geodynamic. The island is located at a point where one end of the Bransfield Strait (BS) meets the extension of the Hero Fracture Zone. 

The unique tectonic configuration of the region also makes it seismically active. In 2014-2015 seismic activity was observed on the island.

The flooded caldera

Sailing into Deception Island on a cruise ship through the rocky passage is a dramatic experience. The calmness of the emerald blue water gives no hint of the ongoing powerful geothermal activities under the surface.

The size of the Deception caldera is similar to other medium-sized calderas like Krakatoa and Santorini. Estimates suggest that around 60 cubic kilometres of magma was expelled during the caldera collapse event. At present, there are 70 eruption vents scattered within the caldera.

Monitoring Deception Island’s volcanic activity

The 1967 and 1969 eruptions on Deception Island were unpredicted. Since the island is visited by research teams and a large number of tourists every year, prediction of volcanic activity is important. 

Presently, there are Argentinian and Spanish research stations being operated on the island during the austral summer. The stations conduct volcanic monitoring and research on marine ecosystems.

Deception Island wildlife

Once it was a site that wreaked havoc on the surrounding wildlife. But today, Deception Island is home to various wildlife. Discussing wildlife in Antarctica without talking about penguins is almost impossible. Today, the spectacular sight of the penguin colonies on the island helps in overcoming the doom and gloom of the past.

The outer periphery of the island at Bailey Head is home to chinstrap and gentoo penguins that you may have the luxury of seeing on your trip. 

Birds like seagulls, skuas, petrels, cormorants, and sheathbills can be found near the central lagoon. Various seal species, including Weddell, crabeater, leopard, fur, and southern elephant seals, use the island as a resting spot. However, it is not a breeding ground for any seal species.

Climate and weather

The climate on Deception Island is classified in the polar maritime category. During the summer, the daytime temperatures can be around 11°C, whereas in winter it can get as low as -28°C. The average annual temperature is -3°C.

Weather conditions in the Southern Ocean remain harsh almost the entire year. You can expect cloud cover over Port Foster during most months. The mean annual rainfall is 500 mm and it occurs mostly during the summer months.

Perhaps unsurprisingly, the volcanic activity results in the formation of microclimates in some zones of the island. The black-sand beach of the island is geothermally heated. So you may find random steam clouds rising from different spots. The seawater in the area can be as hot as 70°C in some places.

Where to visit on Deception Island

Deception Island is a fascinating destination for nature and wildlife photographers as the volcanic geology creates unique patterns worth capturing. Combining the wildlife images with the monochromatic hues and the occasional burst of bright colours can result in some stunning images.

Whaler’s Bay

Once you pass through Neptune's Bellows, Whaler’s Bay is on the right. This natural harbour has a semi-circular ash beach that is around 2 kilometres in length. In the 1950s and 60s, the beach was used as a runway for the British Antarctic air movements. The abandoned hangar still lies at one end of the beach and was actually in the news recently for being tagged with graffiti. A terrible act that angered a lot of people. 

Walk to the southern end of the beach to view the rusted oil tanks and buildings - remnants from the whaling era. Many pieces have actually been cut from the oil tanks so you can walk inside them. 

Telefon Bay

As you move beyond Whaler’s Bay, the scenery becomes more outstanding. At the northwest end, there is the gently sloping beach that is overlooked by a ridge that contains a few unnamed volcanic craters.

The entire area looks like an area devastated by a dragon’s fiery breath. The ash cliffs on both sides of the bay are a result of the 1967 eruption. You might find scientific equipment placed on the beach for monitoring seismic activity.

Pendulum Cove

On the northeast of Port Foster, this small cove is an active zone for the scientists who work on Deception Island. The unusual name of the cove originates from the magnetic observations - including measuring gravity by using a pendulum - that Henry Foster made here in 1829. The rusted remains of the Chilean research station that was hit by the 1969 eruption are here.

Bailey Head

Bailey Head is a long linear beach running along the outer eastern edge of Deception Island. The natural amphitheatre has Antarctica’s largest colony of chinstrap penguins inhabiting it and the views are nothing short of spectacular. 

While the rough surf can make zodiac landings on the beach somewhat tricky, it is a joy to watch numerous penguins parading around and surfing the waters. In the right month, you can observe breeding pairs and catch some of the baby chicks feeding.

Planning your trip to Deception Island

You may find Deception Island quiet, but underneath the surface, it is very much alive. Landing on the beach and standing on the top of an active volcanic crater is an incredible experience. 

Deception Island is an important chapter in Antarctica’s heritage, forming a connection between the past and present. As any Antarctic travel guide would suggest, exploring the island means embracing the spirit of adventure and being ready to connect intimately with the wilderness.

Just like any other Antarctic trip, summer is the best month for planning a visit. Since this small window is the tourist season, plan ahead to avoid the rush for bookings. The weather around the island can always be uncertain, so you may expect sudden changes in the itinerary. Landings at Deception Island are never a guarantee because of weather. 

Whether you want to look back at Antarctica’s history or capture the landscape through the lens, joining a small ship expedition is the best way to do it.

Visit Deception Island and the South Shetland Archipelago with Secret Atlas

The enigma surrounding Deception Island makes it a special destination - a geographical wonder with a dark past. The Secret Atlas team can guide you to the special spots on the island where you can immerse yourself in history or marvel at the stunning views.

Our Small Ship Adventure is conducted on a state-of-the-art polar vessel designed to explore the awe-inspiring immensity of the white continent. With small group sizes, our Antarctic journeys provide a personalized experience to the guests while taking into account the continent’s ecological sensitivity. 

Talk to us to learn more about our voyages.