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Visualizing the Power and Frequency of Earthquakes

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Earthquake Magnitude

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Visualizing the Power and Frequency of Earthquakes

The surface of our planet is in a constant state of creation and destruction as the plates of the Earth collide. It is this movement of the Earth’s crust that causes earthquakes, sending tremors throughout the world.

Today’s graphic is inspired by a classic USGS diagram that tracks the scale and frequency of earthquakes.

Shifting Foundations

Earthquakes occur because the crust of the Earth is made up of several plates. The boundaries of these plates create faults that can run into one another.

Earthquakes describe both the mechanism that causes a sudden stress release along plate boundaries and also the ensuing ground shaking.

They occur when stress builds up along a tectonic fault. This stress causes the two surfaces of the fault, which had previously been stuck together due to friction, to suddenly move, or slide, releasing energy in the form of seismic waves.

Measuring an Earthquake’s Impact

There are three factors to assess the impact of Earthquakes – magnitude, energy, and intensity.

Magnitude is a number most commonly associated with the Richter scale, describing the size of an Earthquake on a scale from 0 to 10 – the latter of which is the maximum motion recorded by a seismograph. Each increase by one on the scale represents a tenfold increase in the amplitude. There are over a million tremors around the planet each year, but it’s not until an earthquake reaches a magnitude of 4 that humans can typically feel it.

Another way to measure the size of an earthquake is by how much energy it releases. The amount of energy radiated by an earthquake is a measure of the potential for damage to man-made structures.

An earthquake releases energy at various frequencies, and in order to calculate accurately, you have to include all frequencies of shaking for the entire event. Some research suggests technology could harness this energy for power generation.

Intensity describes the severity of an earthquake with a qualitative evaluation of its effects on the Earth’s surface and on the built environment. An earthquake may have a high magnitude but if a city or landscape experiences little damage, it can be said that the intensity is low. The Modified Mercalli Intensity Scale measures this intensity.

The World’s Largest Earthquakes by Magnitude

Prior to the development and use of seismographs, around 1900, scientists could only estimate magnitudes, based on historical reports of the extent and severity of damage.

DateLocationMagnitude
May 22, 1960Valdivia, Chile9.4-9.6
March 27, 1964Prince William Sound, Alaska9.2
Dec. 26, 2004Indian Ocean, Sumatra, Indonesia9.1
March 11, 2011Pacific Ocean, Tohoku Region, Japan9.1
July 8, 1730Valparaiso, Chile9.1-9.3 (est.)
Nov. 4, 1952Kamchatka, Russia9
Aug. 13, 1868Arica, Chile8.5-9.0 (est.)
January 26, 1700Pacific Coast, Modern Day British Columbia8.7-9.2 (est.)
April 2, 1762Chittagong, Bangladesh8.8 (est.)
Nov. 25, 1833Sumatra Indonesia8.8 (est.)

Earthquakes are a fact of life on Earth and mark distinct moments in history. One would think given our knowledge of earthquakes, that humans would avoid these locations – however, the very faults of the Earth also create its greatest advantages.

Living with Your Faults

It’s extremely common to find human settlements along the fault lines where earthquakes occur most frequently. Some could say that this is because these decisions were made before a complete understanding of science enabled us to know the potential risks involved.

However, a recent scientific study reveals that there may be more to the pattern than previously thought. Tectonically active plates may have produced greater biodiversity, more food, and water for our human predecessors.

Certain landscape features formed by tectonic processes such as cliffs, river gorges, and sedimentary valleys create environments that support access to drinking water, shelter, and an abundant food supply.

This inherent problem reveals that humans are more connected to their environments than previously thought. It comes down to a question of how well humans can adapt their lifestyle and built environments to a dynamic planet.

Now let’s worry about the asteroids

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Science

Explainer: The Basics of DNA and Genetic Systems

All living things have a genetic system made up of DNA. This graphic explores the basics of DNA composition and structure.

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Explainer: The Basics of DNA and Genetic Systems

While there is great diversity among living things, we all have one thing in common—we all rely on a genetic system made up of DNA and/or RNA.

But how do genetic systems work, and to what extent do they vary across species?

This graphic by Anne-Lise Paris explores the basics of DNA and genetic systems, including how they’re structured, and how they differ across species.

Composition of Genetic Systems: DNA and RNA

A genetic system is essentially a set of instructions that dictate our genetic makeup—what we look like and how we interact with our environment.

This set of instructions is stored in nucleic acids, the two main types being deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).

While most living things rely on a mix of DNA and RNA for cellular reproduction, some viruses just use RNA to store their genetic information and replicate faster.

DNA is made up of four molecules, known as nucleotides: Adenine (A), Thymine (T), Cytosine ( C), and Guanine (G). These nucleotides are grouped in sets of two, which are called base pairs.

Size of Genomes Across Different Organisms

Human DNA is made up of approximately 3.2 billion base pairs that are tightly wound up and stored in our cells. If you were to unwind and measure the DNA stored in a single human cell, it would be about 2 meters (6.5 feet) long!

This lengthy DNA is stored in pairs of chromosomes. A full collection of chromosomes, or an entire set of genetic information, is referred to as a genome.

Genomes vary in size, depending on the organism. Here is a look at 24 different species and the size of their genomes, from animals and plants to bacteria and viruses:

OrganismKingdomSize of genomes (number of base pairs)
Poplar treePlant500,000,000
HumanAnimal3,200,000,000
ChimpanzeeAnimal3,300,000,000
Marbled lungfishAnimal130,000,000,000
DogAnimal2,400,000,000
WheatPlant16,800,000,000
PufferfishAnimal400,000,000
Canopy plantPlant150,000,000,000
Mouse-ear cressPlant140,000,000
CornPlant2,300,000,000
MouseAnimal2,800,000,000
MossPlant510,000,000
Fruit FlyAnimal140,000,000
C. ruddiiBacteria160,000
S. pombeFungi13,000,000
S. cerevisiaeFungi12,000,000
S. cellulosumBacteria13,000,000
H. pyloriBacteria1,700,000
E. coliBacteria4,600,000
Panadoravirus s.Virus2,800,000
HIV-1Virus9,700
Influenza AVirus14,000
BacteriophageVirus49,000
Hepatitis D virusVirus1,700

The Marbled Lungfish has the largest known animal genome. Its genome is made up of 130 billion base pairs, which is about 126.8 billion more than the average human genome.

Comparatively, small viruses and bacteria have fewer base pairs. The Hepatitis D virus has only 1,700 base pairs, while E. coli bacteria has 4.6 million. Interestingly, research has not found a link between the size of a species’ genome and the organism’s size or complexity.

In fact, there are still a ton of unanswered questions in the field of genome research. Why do some species have small genomes? Why do some have a ton of redundant DNA? These are still questions being investigated by scientists today.

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Politics

Mapped: Which Countries Still Have a Monarchy?

Beyond the 15 nations under the British monarchy, 28 other countries still have a ruling monarch. Here’s a look at the world’s monarchies.

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monarchies

Mapped: Which Countries Still Have a Monarchy?

In the wake of Queen Elizabeth II’s death, the question of monarchy is brought sharply into focus.

However, a surprising number of countries have ruling monarchs, and in this visual we break down the kinds of royal leadership across the 43 countries that still have them.

Types of Monarchies

A monarch in the simplest sense is a country’s king, queen, emir, or sultan, and so on. But before diving in, it’s important to break down the distinctions between the types of monarchies that exist today. Generally, there are four kinds:

① Constitutional Monarchy

The monarch divides power with a constitutionally founded government. In this situation, the monarch, while having ceremonial duties and certain responsibilities, does not have any political power. For example, the UK’s monarch must sign all laws to make them official, but has no power to change or reject new laws.

Here are some examples of countries with constitutional monarchies:

🇯🇵  Japan
🇬🇧  United Kingdom
🇩🇰  Denmark

② Absolute Monarchy

The monarch has full and absolute political power. They can amend, reject, or create laws, represent the country’s interests abroad, appoint political leaders, and so on.

Here are some examples of countries with absolute monarchies:

🇸🇿  Eswatini
🇸🇦  Saudi Arabia
🇻🇦  Vatican City

③ Federal Monarchy

The monarch serves an overall figurehead of the federation of states which have their own governments, or even monarchies, ruling them.

Here are some examples of countries with federal monarchies:

🇦🇪  UAE
🇲🇾  Malaysia

Malaysia is a unique form of federal monarchy. Every five years, each state’s royal leaders choose amongst themselves who will be the monarch, or the Yang di-Pertuan Agong, of Malaysia and the respective states. Furthermore, the monarchy is also constitutional, allowing a democratically elected body to govern.

④ Mixed Monarchy

This is a situation wherein an absolute monarch may divide powers in distinct ways specific to the country.

Here are some examples of countries with mixed monarchies:

🇯🇴  Jordan
🇱🇮  Liechtenstein
🇲🇦  Morocco

Interestingly, Liechtenstein is the only European monarchy that still practises strict agnatic primogeniture. Under agnatic primogeniture, the degree of kinship is determined by tracing descent from the nearest common ancestor through male ancestors.

Kings, Queens, Emperors, and Sultans Around the Globe

Now let’s break down the different monarchies country by country:

CountryType of MonarchyTitle of Head of StateMonarchTitle of Head of Government
🇦🇩 AndorraConstitutionalCo-PrincesJoan-Enric Vives, Emmanuel MacronPrime Minister
🇦🇬 Antigua and BarbudaConstitutionalKingCharles IIIPrime Minister
🇦🇺 AustraliaConstitutionalKingCharles IIIPrime Minister
🇧🇭 BahrainMixedKingHamad bin Isa Al KhalifaPrime Minister
🇧🇪 BelgiumConstitutionalKing PhilippePrime Minister
🇧🇿 BelizeConstitutionalKingCharles IIIPrime Minister
🇧🇹 BhutanConstitutionalKingJigme Khesar Namgyel WangchuckPrime Minister
🇧🇳 Brunei DarussalamAbsoluteSultanHassanal BolkiahSultan
🇰🇭 CambodiaConstitutionalKingNorodom SihamoniPrime Minister
🇨🇦 CanadaConstitutionalKingCharles IIIPrime Minister
🇩🇰 DenmarkConstitutionalQueenMargrethe IIPrime Minister
🇸🇿 EswatiniAbsoluteKingMswati IIIPrime Minister
🇬🇩 GrenadaConstitutionalKingCharles IIIPrime Minister
🇯🇲 JamaicaConstitutionalKingCharles IIIPrime Minister
🇯🇵 JapanConstitutionalEmperorNaruhitoPrime Minister
🇯🇴 JordanMixedKingAbdullah IIPrime Minister
🇰🇼 KuwaitMixedEmirNawaf Al-Ahmad Al-Jaber Al-SabahPrime Minister
🇱🇸 LesothoConstitutionalKingLetsie IIIPrime Minister
🇱🇮 Liechtenstein MixedSovereign PrinceHans-Adam IIPrime Minister
🇱🇺 LuxembourgConstitutionalGrand DukeHenriPrime Minister
🇲🇾 MalaysiaConstitutional & FederalYang di-Pertuan AgongAbdullahPrime Minister
🇲🇨 MonacoMixedSovereign PrinceAlbert IIMinister of State
🇲🇦 MoroccoMixedKingMohammed VIPrime Minister
🇳🇱 NetherlandsConstitutionalKingWillem-AlexanderPrime Minister
🇳🇿 New ZealandConstitutionalKingCharles IIIPrime Minister
🇳🇴 NorwayConstitutionalKingHarald VPrime Minister
🇴🇲 OmanAbsoluteSultanHaitham bin TarikSultan
🇵🇬 Papua New GuineaConstitutionalKingCharles IIIPrime Minister
🇶🇦 QatarMixedEmirTamim bin Hamad Al ThaniPrime Minister
🇰🇳 Saint Kitts and NevisConstitutionalKingCharles IIIPrime Minister
🇱🇨 Saint LuciaConstitutionalKingCharles IIIPrime Minister
🇻🇨 Saint Vincent and the GrenadinesConstitutionalKingCharles IIIPrime Minister
🇸🇦 Saudi ArabiaAbsoluteKingSalmanPrime Minister
🇸🇧 Solomon IslandsConstitutionalKingCharles IIIPrime Minister
🇪🇸 SpainConstitutionalKingFelipe VIPresident of the Government
🇸🇪 SwedenConstitutionalKingCarl XVI GustafPrime Minister
🇹🇭 ThailandConstitutionalKingRama XPrime Minister
🇧🇸 The BahamasConstitutionalKingCharles IIIPrime Minister
🇹🇴 TongaConstitutionalKingTupou VIPrime Minister
🇹🇻 TuvaluConstitutionalKingCharles IIIPrime Minister
🇦🇪 UAEFederalPresidentMohamed bin Zayed Al NahyanPrime Minister
🇬🇧 UKConstitutionalKingCharles IIIPrime Minister
🇻🇦 Vatican CityAbsolutePopeFrancisPresident of the Pontifical Commission

Constitutional monarchies are undoubtedly the most popular form of royal leadership in the modern era⁠, making up close to 70% of all monarchies. This situation allows for democratically elected governments to rule the country, while the monarch performs ceremonial duties.

Most monarchs are hereditary, inheriting their position by luck of their birth, but interestingly, French president, Emmanuel Macron, technically serves as a Co-Prince of Andorra.

Another unique case is the Vatican’s Pope Francis, who has absolute power in the small independent city⁠—he gained his role thanks to an election process known as a papal conclave.

The Role of Monarchies

One of the most notable and famous ruling monarchies is the United Kingdom’s House of Windsor⁠—also known as Queen Elizabeth II’s family. King Charles III has now ascended to the country’s throne, making him head of state in 15 nations total, including Canada, Australia, and New Zealand.

Many see the benefit in having a stable and consistent form of tradition and decorum at the country’s head of state.

“The Crown is an integral part of the institution of Parliament. The Queen [now King] plays a constitutional role in opening and dissolving Parliament and approving Bills before they become law.” – British Parliament

Japan’s royal family has been a prime example of stability, having reigned in the country for more than 2,600 years under the same hereditary line.

Critiques and the Future of Monarchy

Some claim, however, that there is no function of monarchy in the modern day, and complaints of monarchies’ immense wealth and power are rampant.

For example, according to the Dutch government, King Willem-Alexander’s budget for 2022, funded by the state and thus, taxpayers, comes out to more than €48 million.

Beyond tax dollars, with absolute monarchies there is typically a lack of political freedoms and certain rights. Saudi Arabia, for example, has no national elections. Rather its king, Salman bin Abdulaziz Al Saud, stays in power for life, appoints the cabinet himself, and passes laws by royal decree.

The death of Queen Elizabeth, though, may bring about change though for many of the world’s royally-governed. Since Barbados’ removal of her as head of state in 2021, six other Caribbean nations have expressed the desire to do the same, namely:

🇧🇿  Belize
🇧🇸  The Bahamas
🇯🇲  Jamaica
🇬🇩  Grenada
🇦🇬  Antigua and Barbuda
🇰🇳  St. Kitts and Nevis

The future of monarchy in the 21st century is certainly not a guarantee.

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