Iceland is a volcanic island in the North Atlantic Ocean, located just south of the Arctic Circle, roughly 800 kilometers from Scotland and 300 kilometers from Greenland. Its geography is defined by a dramatic collision of fire and ice: it sits atop the Mid-Atlantic Ridge where the North American and Eurasian tectonic plates pull apart, while simultaneously being capped by Europe’s largest glacier.
Location and Size
Iceland lies between latitudes 63° and 67° N and longitudes 18° and 24° W. It is the second-largest island in Europe (after Great Britain), covering about 103,000 square kilometers. The island is roughly the size of Kentucky or Portugal, but its coastline stretches for about 4,970 kilometers due to deep fjords and peninsulas. Despite its high latitude, the Gulf Stream moderates the climate, keeping coastal areas far milder than places like Siberia or Greenland at the same latitude.
Geological Formation and Tectonics
Iceland is one of the few places on Earth where a mid-ocean ridge is visible above sea level. It formed about 20 million years ago from volcanic eruptions along the Mid-Atlantic Ridge, where the North American and Eurasian plates diverge at a rate of about 2.5 centimeters per year. This spreading is not uniform: it is concentrated in a broad zone called the rift zone, which runs from the southwest to the northeast of the island. The island also sits atop a mantle plume—a hot upwelling of magma from deep within the Earth—which adds extra volcanic activity and explains why Iceland is much larger than other ridge islands like the Azores.
Volcanoes and Geothermal Activity
Iceland has around 30 active volcanic systems and more than 130 volcanic mountains. The most famous is Eyjafjallajökull, whose 2010 eruption disrupted European air travel for weeks. Another notable volcano, Katla, lies under the Mýrdalsjökull glacier and has erupted roughly every 40–80 years, with the last major eruption in 1918. The country’s volcanic activity also produces vast geothermal fields—areas where underground heat surfaces as hot springs, mud pools, and geysers. The Great Geysir in southwest Iceland gave its name to geysers worldwide, though it rarely erupts today; its neighbor Strokkur erupts every 5–10 minutes. Geothermal energy heats about 90% of Iceland’s homes, and the famous Blue Lagoon is a geothermal spa fed by runoff from the Svartsengi power plant.
Glaciers and Rivers
About 11% of Iceland is covered by glaciers, with Vatnajökull being the largest—covering roughly 8,100 square kilometers, it is the biggest glacier in Europe by volume. These glaciers feed numerous rivers, primarily glacial rivers that carry fine sediment, giving them a characteristic milky turquoise color. The longest river is Þjórsá, about 230 kilometers long, which flows south from the central highlands. Glacial outburst floods, known as jökulhlaup, occur when volcanic eruptions under glaciers melt ice rapidly, sending torrents of water downstream. The most powerful waterfalls in Europe, such as Dettifoss, are fed by glacial rivers; Dettifoss drops 44 meters and has an average flow of about 193 cubic meters per second.
Coastline and Fjords
Iceland’s coastline is deeply indented, especially in the northwest and east, where fjords cut into the land. The Westfjords region is a large peninsula with steep cliffs and narrow inlets, formed by glacial erosion. The east coast has long, straight fjords like Reyðarfjörður, while the south coast is mostly a flat, sandy plain with black beaches, notably Reynisfjara near Vík. The north coast features the Tjörnes Peninsula and the island of Grímsey, which sits directly on the Arctic Circle. The capital, Reykjavík, is located on the southwest coast, on a bay protected by the Seltjarnarnes peninsula.
Climate and Weather Patterns
Iceland has a subpolar oceanic climate (Köppen classification Cfc) that is surprisingly mild for its latitude. Winters in Reykjavík average around 0°C, while summers average around 11°C. The Gulf Stream warms the south and west coasts, while the north and east are cooler and drier. Precipitation varies dramatically: the south coast receives over 1,600 mm annually, while the central highlands get less than 400 mm. The weather is notoriously changeable—locals say, “If you don’t like the weather, just wait five minutes.” The midnight sun shines from mid-May to late July, while polar night (with only a few hours of twilight) occurs from mid-November to late January. The Northern Lights (Aurora Borealis) are visible from September to April in dark, clear skies.
Human Geography and Settlement
Iceland has a population of about 376,000 (2023), making it one of the least densely populated countries in Europe, with roughly 3.6 people per square kilometer. Most people live in the southwest, particularly in the capital region, which holds about two-thirds of the population. The rest of the island is sparsely inhabited, with many coastal villages and farms; the interior highlands are uninhabited. Settlement is concentrated along the coast because the interior is a barren desert of lava fields, sand, and glaciers. The country is divided into eight regions, but these are mostly statistical; local government is based on municipalities. Fishing and tourism are major economic drivers, and the country is highly urbanized despite its small size.
Frequently Asked Questions
Is Iceland really green and Greenland really icy?
The saying is partly true but misleading. Iceland’s coastal lowlands, especially in the south and west, have green meadows and birch forests (though large forests are rare). The highlands and northern areas are barren and rocky. Greenland, despite its name, is mostly covered by ice, but its southern fjords do have green valleys. The names likely come from Viking explorers: Iceland’s first settler, Flóki Vilgerðarson, named it after seeing sea ice, while Erik the Red named Greenland to attract settlers.
What is the tallest mountain in Iceland?
The highest peak is Hvannadalshnúkur, which rises to 2,110 meters. It is part of the Öræfajökull volcano in Vatnajökull National Park. The mountain is actually the rim of a volcanic caldera, and it was first climbed in 1794. Because it is covered by glacier ice, its exact height can vary slightly with snow accumulation.
Why does Iceland have so many hot springs?
Iceland’s hot springs are a direct result of its volcanic activity. Rainwater seeps down through porous rock, gets heated by hot magma near the surface, and rises back up as steam or hot water. The high geothermal gradient—the rate at which temperature increases with depth—is due to the thin crust above the mantle plume. This is why the country can generate geothermal power so cheaply and why hot water is piped to homes for heating.
Does Iceland have any forests?
Yes, but they are small. When the Norse arrived in the 9th century, birch woodland covered about 25–40% of the land. Over centuries of grazing and cutting, that dropped to less than 1%. Today, the Icelandic Forest Service and farmers have been replanting native birch and non-native spruce, and forest cover has risen to about 2% (as of 2020). The largest forest is Hallormsstaðaskógur in the east, covering about 740 hectares.
How far is Iceland from the Arctic Circle?
The Arctic Circle passes through the island of Grímsey, about 40 kilometers north of the mainland. So the mainland itself is entirely south of the Arctic Circle, though the northernmost point, the Rifstangi peninsula, is only about 2.5 kilometers from it. This is why Iceland does not experience true polar day or polar night, but it does have very short winter days and long summer days.
Can you drive around the whole island?
Yes, the Ring Road (Route 1) encircles Iceland, spanning about 1,332 kilometers. It is fully paved and open year-round, though winter weather can close mountain passes. Driving the full loop takes about 10–14 days without stops. However, the road does not cross the central highlands, which are only accessible by 4×4 vehicles on F-roads during summer.
Related
- Japanese Yokan Sweets: What They Are & How to Enjoy
- Colorado Hunting Seasons: Dates, Licenses & Tips
- Ghoul Mask in Blox Fruits: What It Does
How pages are sourced and corrected: Sources and editorial policy.