# What is the scale for magnitude?

## What is the scale for magnitude?

What is the Richter Magnitude Scale?

Richter magnitude | Description |
---|---|

4.0-4.9 | Light |

5.0-5.9 | Moderate |

6.0-6.9 | Strong |

7.0-7.9 | Major |

### What is the intensity of magnitude 1?

Ranking Earthquake Intensity

Magnitude | Average number per year | Modified Mercalli Intensity |
---|---|---|

0 – 1.9 | >1 million | — |

2.0 – 2.9 | >1 million | I |

3.0 – 3.9 | about 100,000 | II – III |

4.0 – 4.9 | about 10,000 | IV – V |

#### What is the scale for earthquake magnitude?

The Richter scale measures the largest wiggle (amplitude) on the recording, but other magnitude scales measure different parts of the earthquake. The USGS currently reports earthquake magnitudes using the Moment Magnitude scale, though many other magnitudes are calculated for research and comparison purposes.

**Does the Richter scale go from 1 to 10?**

The Richter scale does NOT go from 1 to 10, or between any limits at all. Magnitude 0 and smaller earthquakes happen all the time. As a matter of fact, the smaller they are, the more frequently they occur, but the instrumental detection limit extends only to around magnitude -3.

**How far away can you feel a 6.0 earthquake?**

The USGS says in 2011 a 5.8 magnitude earthquake centered in Mineral, Virginia was felt up to 600 miles away. Tens of millions of people in the Eastern U.S. and Canada reported feeling the quake. Comparatively a 6.0 magnitude quake in Napa, California was only felt as far as 250 miles from the epicenter.

## How bad is a 5.9 earthquake?

The scale also has no upper limit….Earthquake Magnitude Scale.

Magnitude | Earthquake Effects | Estimated Number Each Year |
---|---|---|

5.5 to 6.0 | Slight damage to buildings and other structures. | 350 |

6.1 to 6.9 | May cause a lot of damage in very populated areas. | 100 |

7.0 to 7.9 | Major earthquake. Serious damage. | 10-15 |

### Is a 6.0 earthquake strong?

Getty/AFP A strong earthquake is one that registers between 6 and 6.0 on the Richter scale. There are about 100 of these around the world every year and they usually cause some damage. In populated areas, the damage may be severe.

#### Can you feel a 2.1 earthquake?

Normally, earthquakes below magnitude 3 or so are rarely felt. However, smaller quakes from magnitude 2.0 can be felt by people if the quake is shallow (few kilometers only) and if people are very close to its epicenter and not disturbed by ambient factors such as noise, wind, vibrations of engines, traffic etc.

**What are magnitude scales?**

Magnitude scales , like the moment magnitude, measure the size of the earthquake at its source. An earthquake has one magnitude. The magnitude do not depend on where the measurement is made. Often, several slightly different magnitudes are reported for an earthquake.

**What is a logarithmic earthquake magnitude scale?**

The idea of a logarithmic earthquake magnitude scale was first developed by Charles Richter in the 1930’s for measuring the size of earthquakes occurring in southern California using relatively high-frequency data from nearby seismograph stations. This magnitude scale was referred to as ML, with the L standing for local.

## What is the moment magnitude?

The result is called the moment magnitude. The moment magnitude provides an estimate of earthquake size that is valid over the complete range of magnitudes, a characteristic that was lacking in other magnitude scales. How Big Was That Earthquake?

### What is the Richter magnitude scale?

This magnitude scale was referred to as ML, with the L standing for local. This is what was to eventually become known as the Richter magnitude. As more seismograph stations were installed around the world, it became apparent that the method developed by Richter was strictly valid only for certain frequency and distance ranges.