M=log _{10}A-log _{10}A{0}} or
M = log-{10}A/A{0}
where A is the maximum excursion of the Wood-Anderson seismograph, the empirical function A0 depends only on the epicentral distance of the station,
1.0–1.9 Micro I Microearthquakes, not felt. Recorded by seismographs.[1 Continual/several million per year
2.0–2.9 Minor I Felt slightly by some people. No damage to buildings. Over one million per year
3.0–3.9 Slight II to III Often felt by people, but very rarely causes damage. Shaking of indoor objects can be noticeable. Over 100,000 per year
4.0–4.9 Light IV to V Noticeable shaking of indoor objects and rattling noises. Felt by most people in the affected area. Slightly felt outside. Generally causes zero to minimal damage. Moderate to significant damage is very unlikely. Some objects may fall off shelves or be knocked over. 10,000 to 15,000 per year
5.0–5.9 Moderate VI to VII Can cause damage of varying severity to poorly constructed buildings. Zero to slight damage to all other buildings. Felt by everyone. 1,000 to 1,500 per year
6.0–6.9 Strong VII to IX Damage to a moderate number of well-built structures in populated areas. Earthquake-resistant structures survive with slight to moderate damage. Poorly designed structures receive moderate to severe damage. Felt in wider areas; up to hundreds of kilometers from the epicenter. Strong to violent shaking in the epicentral area. 100 to 150 per year
7.0–7.9 Major VIII or higher Causes damage to most buildings, some to partially or completely collapse or receive severe damage. Well-designed structures are likely to receive damage. Felt across great distances with major damage mostly limited to 250 km from the epicenter. 10 to 20 per year
8.0–8.9 Great Major damage to buildings, and structures likely to be destroyed. Will cause moderate to heavy damage to sturdy or earthquake-resistant buildings. Damaging in large areas. Felt in extremely large regions. One per year
9.0–9.9 Extreme Near total destruction – severe damage or collapse to all buildings. Heavy damage and shaking extend to distant locations. Permanent changes in ground topography.
Hope that helps!!!!
This is known as magnitude. It is measured on the moment magnitude scale.
Richter scale is used to measure earthquakes magnitude Shake intensity is measured on the Mercalli scale
The name of the CalTech seismologist who invented the scale used to measure the magnitude of earthquakes is Charles F. Richter. The scale is called the Richter scale and measures the energy released by an earthquake at its source.
The scale used today to measure earthquakes is the moment magnitude scale (Mw). It is the most widely used scale for measuring the size of earthquakes because it provides a more accurate representation of an earthquake's size and energy release compared to older scales like the Richter scale.
The most commonly used scale to measure the magnitude of earthquakes is the Richter scale. However, the moment magnitude scale (Mw) is now more widely used as it provides a more accurate measurement for larger earthquakes. Other scales include the Modified Mercalli Intensity (MMI) scale, which measures the intensity of shaking at a specific location.
The scale used to measure the strength of an earthquake is called the Richter scale
Richter scale
The Richter scale
This is known as magnitude. It is measured on the moment magnitude scale.
You can measure earthquakes on the Moment magnitude scale or the Richter scale
the rictor scale
An earthquakes intensity
magnitude
The standard units used to measure the magnitude of earthquakes are the Richter scale and the moment magnitude scale.
Richter scale is used to measure earthquakes magnitude Shake intensity is measured on the Mercalli scale
Earthquakes can never be predicted because Mother Nature is a surprise to us all
Earthquake measure