Question

Identify the incorrect statement concerning earthquake magnitude and significant historical events.

1. The Richter magnitude scale is used to quantify the energy released by an earthquake at its source.
2. Earthquakes registering a magnitude of 6 and above on the Richter scale are often associated with highly devastating effects.
3. The Valdivia Earthquake in Chile, which recorded a magnitude of 9.5, is recognized as the largest earthquake ever recorded globally.
4. An earthquake's destructive power is solely determined by its Richter magnitude, irrespective of its depth or the local geological conditions.

• A. 4 മാത്രം
• B. ഇവയൊന്നുമല്ല
• C. 1, 2
• D. 3, 4

Answer 1

Answer:

A. 4 മാത്രം

• The Richter magnitude scale measures the energy released at the earthquake's source based on the amplitude of seismic waves recorded by seismographs.

• Earthquakes with a magnitude of 6 and above usually result in significant damage, depending on various factors.

• The Valdivia Earthquake in Chile, with a moment magnitude of 9.5, is indeed recognized as the largest earthquake recorded globally.

• However, an earthquake’s destructiveness depends not only on its magnitude but also on its depth, distance from populated areas, building structures, and local geological conditions. Therefore, destructive power cannot be judged solely by the Richter magnitude.