Explainer: The Different Types of Volcanoes on Earth
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Explainer: The Different Types of Volcanoes on Earth

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Infographic explaining how volcanoes are formed and different types

Explainer: The Different Types of Volcanoes on Earth

Even if you don’t live near a volcano, you’ve been impacted by their activity.

It’s estimated that more than 80% of our planet’s surface has been shaped by volcanic activity. They’ve helped create our mountain ranges, plains, and plateaus, and have even helped fertilize the land that we now use to grow crops.

These critical mounds come in many shapes and sizes. This graphic by Giulia De Amicis provides a brief introduction to volcanoes, explaining their different types of shapes and eruptions.

Types of Eruptions

A volcano starts to form when molten rock rises from a crack in the Earth’s surface, which often emerge along tectonic plate boundaries.

Magma rises to the Earth’s surface because it’s lighter than rock. When it surfaces or erupts, it’s referred to as lava.

There are various types of volcanic eruptions, depending on the lava’s temperature, thickness, and composition. Generally speaking, high gas content and high ​​viscosity lead to explosive eruptions, while low viscosity and gas content lead to an effusive, or steadily flowing, eruption.

The Four Main Types of Volcanoes

Volcanoes vary in size and structure, depending on how they’re formed. Most volcanoes types fall into four main groups:

Shield Volcanoes

Shield volcanoes are built slowly, from low-viscosity lava that spreads far and quick. The lava eventually dries to form a thin, wide sheet, and after repeated eruptions, a mount starts to form.

From the top, these types of volcanoes look like a shield, hence the name. While these volcanoes take a while to form, they aren’t necessarily low. In fact, the world’s tallest active volcano, Mauna Kea in Hawaii, is a shield volcano.

Stratovolcanoes

Also known as composite volcanoes, stratovolcanoes are built relatively fast, at least compared to shield volcanoes. This is because, in between lava eruptions, composite volcanoes emit ash and rock, which helps add structure to the mound rather quickly.

Some well-known composite volcanoes are Mount Fuji in Japan, Mount St. Helens in Washington, and Mount Cotopaxi in Ecuador.

Volcanic Domes

Opposite to shield volcanoes, volcanic domes are formed when lava is highly-viscous. Because the thick lava can’t travel very far, it starts to pool around the volcano’s vent.

This can sometimes create a pressure build-up, meaning dome volcanoes are prone to explosive eruptions.

Cinder Cones

These types of volcanoes typically don’t release lava. Rather, their eruptions typically emit volcanic ash and rocks, known as pyroclastic products.

Cinder cones are characterized by a bowl-shaped crater at the top, and usually don’t exceed 400 m (1,312 ft) in height.

How Volcanoes Benefit the Earth

Volcanoes have a number of ecological benefits. Once broken down, volcanic materials create exceptionally fertile soil, which can help build prospering new habitats for animals and plants.

Volcanic eruptions can also help cool our climate. When a volcano explodes, ash and sulfur gas from the eruption combine with water droplets and get trapped in the atmosphere for years. This has a cooling effect which is extremely beneficial to us, especially given our current global warming situation.

Dr. Tracy Gregg, associate professor for the University at Buffalo’s geology department, told Accuweather that “volcanoes have actually helped to keep the world about 2 to 3 degrees cooler than it otherwise may be.”

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This article was published as a part of Visual Capitalist's Creator Program, which features data-driven visuals from some of our favorite Creators around the world.

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Money

Mapped: Which Countries Have the Highest Inflation?

Many countries around the world are facing double or triple-digit inflation. See which countries have the highest inflation rates on this map.

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Mapped: Which Countries Have the Highest Inflation Rate?

This was originally posted on Elements. Sign up to the free mailing list to get beautiful visualizations on natural resource megatrends in your email every week.

Inflation is surging nearly everywhere in 2022.

Geopolitical tensions are triggering high energy costs, while supply-side disruptions are also distorting consumer prices. The end result is that almost half of countries worldwide are seeing double-digit inflation rates or higher.

With new macroeconomic forces shaping the global economy, the above infographic shows countries with the highest inflation rates, using data from Trading Economics.

Double-Digit Inflation in 2022

As the table below shows, countless countries are navigating record-high levels of inflation. Some are even facing triple-digit inflation rates. Globally, Zimbabwe, Lebanon, and Venezuela have the highest rates in the world.

CountryInflation Rate, Year-Over-YearDate
🇿🇼 Zimbabwe269.0%Oct 2022
🇱🇧 Lebanon162.0%Sep 2022
🇻🇪 Venezuela156.0%Oct 2022
🇸🇾 Syria139.0%Aug 2022
🇸🇩 Sudan103.0%Oct 2022
🇦🇷 Argentina88.0%Oct 2022
🇹🇷 Turkey85.5%Oct 2022
🇱🇰 Sri Lanka66.0%Oct 2022
🇮🇷 Iran52.2%Aug 2022
🇸🇷 Suriname41.4%Sep 2022
🇬🇭 Ghana40.4%Oct 2022
🇨🇺 Cuba37.2%Sep 2022
🇱🇦 Laos36.8%Oct 2022
🇲🇩 Moldova34.6%Oct 2022
🇪🇹 Ethiopia31.7%Oct 2022
🇷🇼 Rwanda31.0%Oct 2022
🇭🇹 Haiti30.5%Jul 2022
🇸🇱 Sierra Leone29.1%Sep 2022
🇵🇰 Pakistan26.6%Oct 2022
🇺🇦 Ukraine26.6%Oct 2022
🇲🇼 Malawi25.9%Sep 2022
🇱🇹 Lithuania23.6%Oct 2022
🇪🇪 Estonia22.5%Oct 2022
🇧🇮 Burundi22.1%Oct 2022
🇸🇹 Sao Tome and Principe21.9%Sep 2022
🇱🇻 Latvia21.8%Oct 2022
🇭🇺 Hungary21.1%Oct 2022
🇳🇬 Nigeria21.1%Oct 2022
🇲🇰 Macedonia19.8%Oct 2022
🇲🇲 Myanmar19.4%Jun 2022
🇰🇿 Kazakhstan18.8%Oct 2022
🇵🇱 Poland17.9%Oct 2022
🇧🇬 Bulgaria17.6%Oct 2022
🇹🇲 Turkmenistan17.5%Dec 2021
🇧🇦 Bosnia and Herzegovina17.3%Sep 2022
🇲🇪 Montenegro16.8%Oct 2022
🇦🇴 Angola16.7%Oct 2022
🇧🇫 Burkina Faso16.5%Sep 2022
🇪🇬 Egypt16.2%Oct 2022
🇰🇲 Comoros15.9%Sep 2022
🇰🇬 Kyrgyzstan15.4%Oct 2022
🇷🇴 Romania15.3%Oct 2022
🇧🇾 Belarus15.2%Oct 2022
🇨🇿 Czech Republic15.1%Oct 2022
🇷🇸 Serbia15.0%Oct 2022
🇸🇰 Slovakia14.9%Oct 2022
🇲🇳 Mongolia14.5%Oct 2022
🇳🇱 Netherlands14.3%Oct 2022
🇦🇿 Azerbaijan13.7%Oct 2022
🇦🇫 Afghanistan13.6%Sep 2022
🇬🇲 Gambia13.3%Sep 2022
🇭🇷 Croatia13.2%Oct 2022
🇧🇼 Botswana13.1%Oct 2022
🇸🇳 Senegal13.0%Oct 2022
🇨🇱 Chile12.8%Oct 2022
🇽🇰 Kosovo12.7%Oct 2022
🇷🇺 Russia12.6%Oct 2022
🇬🇳 Guinea12.4%Jul 2022
🇧🇪 Belgium12.3%Oct 2022
🇨🇴 Colombia12.2%Oct 2022
🇺🇿 Uzbekistan12.2%Oct 2022
🇨🇬 Congo12.2%Oct 2022
🇳🇮 Nicaragua12.2%Oct 2022
🇰🇾 Cayman Islands12.1%Jun 2022
🇲🇺 Mauritius11.9%Oct 2022
🇲🇿 Mozambique11.8%Oct 2022
🇮🇹 Italy11.8%Oct 2022
🇲🇱 Mali11.3%Sep 2022
🇲🇷 Mauritania11.3%Sep 2022
🇬🇧 United Kingdom11.1%Oct 2022
🇦🇹 Austria11.0%Oct 2022
🇸🇪 Sweden10.9%Oct 2022
🇺🇬 Uganda10.7%Oct 2022
🇬🇪 Georgia10.6%Oct 2022
🇩🇪 Germany10.4%Oct 2022
🇭🇳 Honduras10.2%Oct 2022
🇩🇰 Denmark10.1%Oct 2022
🇵🇹 Portugal10.1%Oct 2022
🇯🇲 Jamaica9.9%Oct 2022
🇸🇮 Slovenia9.9%Oct 2022
🇬🇹 Guatemala9.7%Oct 2022
🇿🇲 Zambia9.7%Oct 2022
🇰🇪 Kenya9.6%Oct 2022
🇦🇲 Armenia9.5%Oct 2022
🇮🇸 Iceland9.4%Oct 2022
🇲🇬 Madagascar9.3%Aug 2022
🇮🇪 Ireland9.2%Oct 2022
🇱🇸 Lesotho9.2%Sep 2022
🇹🇳 Tunisia9.2%Oct 2022
🇬🇷 Greece9.1%Oct 2022
🇺🇾 Uruguay9.1%Oct 2022
🇨🇷 Costa Rica9.0%Oct 2022
🇧🇩 Bangladesh8.9%Oct 2022
🇨🇾 Cyprus8.8%Oct 2022
🇫🇴 Faroe Islands8.8%Sep 2022
🇩🇿 Algeria8.7%Sep 2022
🇳🇵 Nepal8.6%Sep 2022
🇸🇧 Solomon Islands8.5%Aug 2022
🇲🇽 Mexico8.4%Oct 2022
🇬🇼 Guinea Bissau8.4%Sep 2022
🇦🇱 Albania8.3%Oct 2022
🇧🇧 Barbados8.3%Aug 2022
🇫🇮 Finland8.3%Oct 2022
🇲🇦 Morocco8.3%Sep 2022
🇵🇪 Peru8.3%Oct 2022
🇩🇴 Dominican Republic8.2%Oct 2022
🇨🇻 Cape Verde8.2%Oct 2022
🇵🇾 Paraguay8.1%Oct 2022
🇹🇱 East Timor7.9%Sep 2022
🇹🇬 Togo7.9%Sep 2022
🇵🇭 Philippines7.7%Oct 2022
🇺🇸 U.S.7.7%Oct 2022
🇨🇲 Cameroon7.6%Sep 2022
🇳🇴 Norway7.5%Oct 2022
🇸🇬 Singapore7.5%Sep 2022
🇿🇦 South Africa7.5%Sep 2022
🇸🇻 El Salvador7.5%Oct 2022
🇲🇹 Malta7.4%Oct 2022
🇦🇺 Australia7.3%Sep 2022
🇪🇸 Spain7.3%Oct 2022
🇹🇩 Chad7.2%Sep 2022
🇳🇿 New Zealand7.2%Sep 2022
🇧🇿 Belize7.1%Sep 2022
🇳🇦 Namibia7.1%Oct 2022
🇦🇼 Aruba7.0%Sep 2022
🇨🇦 Canada6.9%Oct 2022
🇱🇺 Luxembourg6.9%Oct 2022
🇸🇴 Somalia6.9%Oct 2022
🇮🇳 India6.8%Oct 2022
🇦🇪 United Arab Emirates6.8%Jun 2022
🇬🇾 Guyana6.5%Sep 2022
🇱🇷 Liberia6.5%Jul 2022
🇧🇷 Brazil6.5%Oct 2022
🇧🇸 Bahamas6.3%Aug 2022
🇨🇮 Ivory Coast6.3%Sep 2022
🇹🇹 Trinidad and Tobago6.3%Aug 2022
🇫🇷 France6.2%Oct 2022
🇩🇯 Djibouti6.1%Sep 2022
🇵🇷 Puerto Rico6.1%Sep 2022
🇧🇹 Bhutan6.1%Sep 2022
🇧🇹 Qatar6.0%Sep 2022
🇹🇭 Thailand6.0%Oct 2022
🇸🇿 Swaziland5.8%Aug 2022
🇮🇩 Indonesia5.7%Oct 2022
🇰🇷 South Korea5.7%Oct 2022
🇹🇯 Tajikistan5.7%Sep 2022
🇵🇬 Papua New Guinea5.5%Jun 2022
🇰🇭 Cambodia5.4%Jul 2022
🇮🇶 Iraq5.3%Sep 2022
🇯🇴 Jordan5.2%Oct 2022
🇫🇯 Fiji5.1%Sep 2022
🇮🇱 Israel5.1%Oct 2022
🇳🇨 New Caledonia5.0%Sep 2022
🇹🇿 Tanzania4.9%Oct 2022
🇧🇲 Bermuda4.5%Jul 2022
🇪🇷 Eritrea4.5%Dec 2021
🇲🇾 Malaysia4.5%Sep 2022
🇭🇰 Hong Kong4.4%Sep 2022
🇵🇸 Palestine4.4%Oct 2022
🇧🇳 Brunei4.3%Sep 2022
🇱🇾 Libya4.3%Sep 2022
🇻🇳 Vietnam4.3%Oct 2022
🇪🇨 Ecuador4.0%Oct 2022
🇧🇭 Bahrain4.0%Sep 2022
🇯🇵 Japan3.7%Oct 2022
🇰🇼 Kuwait3.2%Sep 2022
🇳🇪 Niger3.2%Sep 2022
🇲🇻 Maldives3.1%Sep 2022
🇬🇦 Gabon3.0%Jul 2022
🇱🇮 Liechtenstein3.0%Oct 2022
🇸🇦 Saudi Arabia3.0%Oct 2022
🇨🇭 Switzerland3.0%Oct 2022
🇸🇨 Seychelles2.9%Oct 2022
🇬🇶 Equatorial Guinea2.9%Dec 2021
🇧🇴 Bolivia2.9%Oct 2022
🇹🇼 Taiwan2.7%Oct 2022
🇨🇫 Central African Republic2.7%Dec 2021
🇻🇺 Vanuatu2.7%Mar 2022
🇴🇲 Oman2.4%Sep 2022
🇧🇯 Benin2.1%Oct 2022
🇨🇳 China2.1%Oct 2022
🇵🇦 Panama1.9%Sep 2022
🇲🇴 Macau1.1%Sep 2022
🇸🇸 South Sudan-2.5%Aug 2022

*Inflation rates based on the latest available data.

As price pressures mount, 33 central banks tracked by the Bank of International Settlements (out of a total of 38) have raised interest rates this year. These coordinated rate hikes are the largest in two decades, representing an end to an era of rock-bottom interest rates.

Going into 2023, central banks could continue this shift towards hawkish policies as inflation remains aggressively high.

The Role of Energy Prices

Driven by the war in Ukraine, energy inflation is pushing up the cost of living around the world.

Since October 2020, an index of global energy prices—made up of crude oil, natural gas, coal, and propane—has increased drastically.

Double-Digit Inflation

Compared to the 2021 average, natural gas prices in Europe are up sixfold. Real European household electricity prices are up 78% and gas prices have climbed even more, at 144% compared to 20-year averages.

Amid global competition for liquefied natural gas supplies, price pressures are likely to stay high, even though they have fallen recently. Other harmful consequences of the energy shock include price volatility, economic strain, and energy shortages.

“The world is in the midst of the first truly global energy crisis, with impacts that will be felt for years to come”.

-Fatih Birol, executive director of the IEA

Double-Digit Inflation: Will it Last?

If history is an example, taming rising prices could take at least a few years yet.

Take the sky-high inflation of the 1980s. Italy, which managed to combat inflation faster than most countries, brought down inflation from 22% in 1980 to 4% in 1986.

If global inflation rates, which hover around 9.8% in 2022, were to follow this course, it would take at least until 2025 for levels to reach the 2% target.

It’s worth noting that inflation was also highly volatile over this decade. Consider how inflation fell across much of the rich world by 1981 but shot up again in 1987 amid higher energy prices. Federal Reserve chair Jerome Powell spoke to the volatility of inflation at their November meeting, indicating that high inflation has a chance of following a period of low inflation.

While the Federal Reserve projects U.S. inflation to fall closer to its 2% target by 2024, the road ahead could still get a lot bumpier between now and then.

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Misc

Visualized: The Many Shapes of Bacteria

We introduce the visual diversity of bacteria and illustrate how they are categorized by appearance—from a single cell to an entire colony.

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Invisible Diversity: The Many Shapes of Bacteria

Bacteria are amazing.

They were the first form of life to appear on Earth almost 3.8 billion years ago.

They make up the second most abundant lifeform, only outweighed by plants.

And most interesting of all: they exist in practically every environment on our planet, including areas where no other lifeforms can survive. As a result, bacteria exhibit a wide variety of appearances, behaviors, and applications similar to the lifeforms we see in our everyday lives.

The incredible diversity of bacteria goes underappreciated simply because they are invisible to the naked eye. Here, we illustrate how researchers classify these creatures on the basis of appearance, giving you a glimpse into this microscopic world.

A Life of Culture

Though bacteria may look similar to other microorganisms like fungi or plankton, they are entirely unique on a microscopic and genetic level.

Bacteria make up one of the three main domains of life. All life shares its earliest ancestor with this group of microbes, alongside two other domains: the Archaea and the Eukarya.

Archaea are very similar to bacteria, but have different contents making up their cell walls.

Eukarya largely consists of complex, multicellular life, like fungi, plants, and animals. Bacteria are similar to its single-celled members because all bacteria are also unicellular. However, while all Eukarya have nuclear membranes that store genetic material, bacteria do not.

Bacteria have their genetic material free-floating within their cellular bodies. This impacts how their genes are encoded, how proteins are synthesized, and how they reproduce. For example, bacteria do not reproduce sexually. Instead, they reproduce on their own.

Bacteria undergo a process called binary fission, where any one cell divides into two identical cells, and so on. Fission occurs quickly. In minutes, populations can double rapidly, eventually forming a community of genetically identical microbes called a colony.

Colonies can be visible to the human eye and can take on a variety of different shapes, textures, sizes, colors, and behaviors. You might be familiar with some of these:

Superstars of a Tiny World

The following are some interesting bacterial species, some of which you may be familiar with:

Epulopiscium spp

This species is unusually large, ranging from 200-700 micrometers in length. They are also incredible picky, living only within the guts of sturgeon, a type of large fish.

Deinococcus radiodurans

D. radiodurans is a coccus-shaped species that can withstand 1,500 times the dose of radiation that a human can.

Escherichia coli

Despite being known famously for poisoning food and agriculture spaces from time to time, not all E.coli species are dangerous.

Desulforudis audaxviator

Down in the depths of a South African gold mine, this species thrives without oxygen, sunlight, or friends—it is the only living species in its ecosystem. It survives eating minerals in the surrounding rock.

Helicobacter pylori

Known for causing stomach ulcers, this spiral-shaped species has also been associated with many cancers that impact the lymphoid tissue.

Planococcus halocryophillus

Most living things cease to survive in cold temperatures, but P. halocryophillus thrives in permafrost in the High Arctic where temperatures can drop below -25°C/-12°F.

‘Bact’ to the Future

Despite their microscopic size, the contributions bacteria make to our daily lives are enormous. Researchers everyday are using them to study new environments, create new drug therapies, and even build new materials.

Scientists can profile the diversity of species living in a habitat by extracting DNA from an environmental sample. Known as metagenomics, this field of genetics commonly studies bacterial populations.

In oxygen-free habitats, bacteria continuously find alternative sources of energy. Some have even evolved to eat plastic or metal that have been discarded in the ocean.

The healthcare industry uses bacteria to help create antibiotics, vaccines, and other metabolic products. They also play a major role in a new line of self-building materials, which include “self-healing” concrete and “living bricks”.

Those are just a few of the many examples in which bacteria impact our daily lives. Although they are invisible, without them, our world would undoubtedly look like a much different place.

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