earth science

Lists of 20th-century earthquakes

Lists of 20th-century earthquakes is a earth science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Lists of 20th-century earthquakes rather than just read about it. In short: This list of 20th-century earthquakes is a list of earthquakes of magnitude 6 and above that occurred in the 20th century. Some smaller events which nevertheless had a significant impact are also included.

Key takeaways

Lists of 20th-century earthquakes belongs to earth science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Lists of 20th-century earthquakes to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Lists of 20th-century earthquakes from memory before moving on to harder problems.

Reference excerpt

This list of 20th-century earthquakes is a list of earthquakes of magnitude 6 and above that occurred in the 20th century. Some smaller events which nevertheless had a significant impact are also included. After 1900 most earthquakes have some degree of instrumental records and this means that the locations and magnitudes are more reliable than for earlier events. Unless otherwise noted, times are local time and magnitudes use the moment magnitude scale (Mw).

List of deadliest earthquakes

Note: 10,000 or more fatalities

List of largest earthquakes by magnitude

Note: Magnitude 8.5 or greater

List of deadliest earthquakes by year

1901–1910

1911–1920

1921–1930

1931–1940

1941–1950

1951–1960

1961–1970

1971–1980

1981–1990

1991–2000

Key to magnitudes ML = Local magnitude (Richter) MS = Surface-wave magnitude Mw = Moment magnitude

Worked examples

Example 1 — a first encounter with Lists of 20th-century earthquakes

Start with the simplest possible case. Write down what Lists of 20th-century earthquakes claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In earth science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Lists of 20th-century earthquakes before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Lists of 20th-century earthquakes ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Lists of 20th-century earthquakes

In research: Lists of 20th-century earthquakes appears in earth science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Lists of 20th-century earthquakes in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Lists of 20th-century earthquakes is common in secondary-school and first-year university syllabi. It links to neighbouring topics 20th-century earthquakes, 20th century-related lists, Lists of 20th-century earthquakes, so understanding it makes those chapters shorter.
In everyday life: Look for Lists of 20th-century earthquakes outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Lists of 20th-century earthquakes in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Lists of 20th-century earthquakes means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Lists of 20th-century earthquakes out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Lists of 20th-century earthquakes in simple terms?

Why does Lists of 20th-century earthquakes matter?

Because it connects several earth science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Lists of 20th-century earthquakes?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Lists of 20th-century earthquakes.