Browse by Magnitude

Explore earthquakes categorized by their strength on the Richter scale

The magnitude of an earthquake is a measure of the energy released at its source. Each whole number increase represents approximately 32 times more energy release.

Understanding Earthquake Magnitudes

Richter Scale

The magnitude scale is logarithmic, meaning each whole number increase represents a tenfold increase in measured amplitude and approximately 32 times more energy release. For example, a magnitude 6.0 earthquake releases about 32 times more energy than a magnitude 5.0.

Impact Levels

Lower magnitude earthquakes (below 5.0) are generally felt but cause minimal damage. Moderate quakes (5.0-6.9) can cause damage to buildings. Strong to great earthquakes (7.0+) can cause serious damage over large areas and are capable of widespread destruction.

Browse by Magnitude Range

All Earthquakes

M0 - M+
All recorded earthquakes regardless of magnitude
202,284
Earthquakes
200.0%
of total
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Moderate

M5 - M5.9
Can cause some damage to poorly constructed buildings
84,115
Earthquakes
83.2%
of total
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Strong

M6 - M6.9
May cause a lot of damage in very populated areas
11,900
Earthquakes
11.8%
of total
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Major

M7 - M7.9
Serious damage over larger areas
1,336
Earthquakes
1.3%
of total
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Great

M8 - M+
Can cause serious damage in areas several hundred miles across
96
Earthquakes
0.1%
of total
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Frequently Asked Questions

What is earthquake magnitude?

Magnitude is a measure of the size of an earthquake based on the amplitude of seismic waves. It's calculated using data from seismographs and represents the energy released at the earthquake's source.

How often do major earthquakes occur?

On average, the Earth experiences one magnitude 8+ earthquake per year, about 15 magnitude 7-7.9 earthquakes per year, and roughly 134 magnitude 6-6.9 earthquakes annually. Smaller earthquakes (magnitude 5-5.9) occur several hundred times each year.

Can magnitude predict damage?

While magnitude indicates the energy released, the actual damage depends on many factors including depth, distance from populated areas, building construction quality, and local soil conditions. A moderate earthquake in a densely populated area can cause more damage than a stronger one in a remote location.