Measuring Earthquake Destruction: Scales Explained
The question asks how the amount of destruction caused by an earthquake is measured. Different scales are used in seismology to understand earthquakes, each focusing on different aspects.
Understanding Earthquake Measurement Scales
When studying earthquakes, scientists use various scales. It's important to differentiate between measuring the earthquake's strength at its source and measuring its impact on the surface.
Magnitude Scales (Richter Scale and Moment Magnitude Scale)
Scales like the Richter Scale (developed by Charles Richter) and the more modern Moment Magnitude Scale (often simply called magnitude) are designed to measure the energy released by an earthquake. This energy is released at the earthquake's source, deep within the Earth.
- These scales provide a quantitative, numerical value based on recordings from seismographs.
- A higher number indicates a stronger earthquake with more energy released.
Intensity Scales (Mercalli Scale)
The Mercalli Scale, on the other hand, is an intensity scale. It measures the effects of an earthquake at a specific location on the Earth's surface. This includes:
- How the earthquake is perceived by people.
- The extent of damage to buildings and infrastructure.
- Observed effects on the environment, such as ground deformation or landslides.
The Mercalli Scale uses Roman numerals, typically ranging from I (not felt) to XII (catastrophic destruction), to describe the observed intensity.
Why Mercalli Scale Measures Destruction
The key difference lies in what is being measured:
- Magnitude Scales (like Richter) measure the earthquake's size or strength at its origin (how much energy was released).
- Intensity Scales (like Mercalli) measure the earthquake's impact and the resulting destruction experienced at different locations on the surface.
Since the question specifically asks about the amount of destruction caused, the scale that assesses the observed effects and damage is the correct one. This is precisely what the Mercalli Scale does.
Therefore, the Mercalli Scale is used to measure the amount of destruction caused by an earthquake.
Important Questions from General Science
- In which year does ISRO plan to launch the first base module of the Bharatiya Antariksh Station?
- Consider the following statements:
Statement-I: Buckyballs, also known as fullerenes, are fascinating carbon molecules that resemble soccer balls
Statement-II: Fly Ash from thermal power plants contain buckyballs
Which one of the following is correct in respect of the above statements? - Which of the following statement(s) is/are correct with respect to possible effects of solar storms on earth?
i. Disruption of GPS navigation and satellite communications
ii. Destruction of power grids
iii. Tsunamis at equatorial regions
iv. Intense auroras all over the Earth
Select the answer using the code given below. - Consider the following features:
i. Blockchain integration
ii. Centralized platform
iii. User ownership and control
iv. Interoperability
Which of the above are characteristics of Web 3.0? - Urea Gold' is a mixture of:
