# What is the difference between Mercalli and Richter?

## What is the difference between Mercalli and Richter?

While the Mercalli scale describes the intensity of an earthquake based on its observed effects, the Richter scale describes the earthquake’s magnitude by measuring the seismic waves that cause the earthquake.

### What does Mercalli scale measure?

The Mercalli Scale is based on observable earthquake damage. From a scientific standpoint, the magnitude scale is based on seismic records while the Mercalli is based on observable data which can be subjective.

#### What does the Mercalli scale tell us about earthquakes?

The Mercalli intensity scale (or more precisely the Modified Mercalli intensity scale) is a scale to measure the intensity of earthquakes. When there is little damage, the scale describes how people felt the earthquake, or how many people felt it.

What is earthquake Mercalli?

The modified Mercalli intensity scale (MM or MMI), developed from Giuseppe Mercalli’s Mercalli intensity scale of 1902, is a seismic intensity scale used for measuring the intensity of shaking produced by an earthquake.

Which is better Mercalli scale or Richter scale?

The Mercalli scale is linear and the Richter scale is logarithmic. i.e. a magnitude 5 earthquake is ten times as intense as a magnitude 4 earthquake….Comparison chart.

Mercalli Scale Richter Scale
Measuring Tool Observation Seismograph

## Where does the most powerful earthquake occur?

Science Center Objects

Mag Location
1. 9.5 Bio-Bio, Chile
3. 9.1 Off the West Coast of Northern Sumatra
4. 9.1 Near the East Coast of Honshu, Japan

### At what intensity is there considerable damage to poorly built buildings?

Modified Mercalli Intensity Scale

Intensity Witness Perceptions and Damage
VIII Little damage in specially built structures. Considerable damage to ordinary buildings, severe damage to poorly built structures. Some walls collapse.

#### How much stronger is a 7 earthquake than a 6?

For each whole-number increase in magnitude, the seismic energy released increases by about 32 times. That means a magnitude 7 earthquake produces 32 times more energy — or is 32 times stronger — than a magnitude 6.

How does the Mercalli scale measure the effect of an earthquake?

‘The Mercalli scale measures the effect of an earthquake rather than its intensity.’ ‘Intensities on the Mercalli scale are usually shown in Roman numerals, a convention worth preserving because it helps to distinguish intensity ratings from magnitude ratings.’

Who was the Modified Mercalli scale named after?

“Mercalli” redirects here. For the scientist whom the scale is named after, see Giuseppe Mercalli. The modified Mercalli intensity scale ( MM or MMI ), developed from Giuseppe Mercalli ‘s Mercalli intensity scale of 1902, is a seismic intensity scale used for measuring the intensity of shaking produced by an earthquake.

## Which is the highest point on the Mercalli scale?

noun A twelve-point scale for expressing the local intensity of an earthquake, ranging from I (virtually imperceptible) to XII (total destruction). ‘The Mercalli scale measures the effect of an earthquake rather than its intensity.’

### Why is the Modified Mercalli intensity scale important?

The Modified Mercalli Intensity value assigned to a specific site after an earthquake has a more meaningful measure of severity to the nonscientist than the magnitude because intensity refers to the effects actually experienced at that place. The lower numbers of the intensity scale generally deal with the manner in which