Notes and Study material for Exams
Earthquakes occur when energy stored in elastically strained rocks is suddenly released. This release of energy causes intense ground shaking in the area near the source of the earthquake and sends waves of elastic energy, called seismic waves, throughout the Earth. Earthquakes can be generated by bomb blasts, volcanic eruptions, sudden volume changes in … Read more
Bureau of Indian Standards , based on the past seismic history, grouped the country into four seismic zones, viz. Zone-II, -III, -IV and –V. Of these, Zone V is the most seismically active region, while zone II is the least. The Modified Mercalli (MM) intensity, which measures the impact of the Earthquakes on the surface of the … Read more
Earthquakes and INFRASTRUCTURE, and it can also cause landslides and liquefaction. Tsunamis, which are large waves caused by earthquakes, can also cause widespread damage. Volcanoes are formed when magma, or molten rock, rises to the surface of the Earth. Magma can rise to the surface through cracks in the Earth’s crust, or it can erupt … Read more
Waves A wave can be described as a disturbance that travels through a medium from one location to another location.It is a disturbance or variation that transfers energy progressively from point to point. It may take the form of an elastic deformation, a variation of pressure, electric or magnetic intensity, electric potential, or temperature. When … Read more
Most of the knowledge we have about Earth’s deep interior comes from the fact that seismic waves penetrate the Earth and are recorded on the other side. Earthquake ray paths and arrival times are more complex than illustrated in the animations, because velocity in the Earth does not simply increase with depth. Velocities generally … Read more
Understanding Earthquakes: A Comprehensive Guide Earthquakes, those sudden and often violent shifts in the Earth’s crust, are a powerful reminder of the dynamic nature of our planet. These seismic events can cause widespread devastation, leaving behind shattered landscapes, collapsed buildings, and a trail of human suffering. Yet, understanding earthquakes is crucial not only for mitigating … Read more
The Trembling Earth: Understanding Earthquakes and Their Body Waves Earthquakes, those sudden and violent shifts in the Earth’s crust, are a powerful reminder of the dynamic nature of our planet. They can cause widespread devastation, leaving behind shattered landscapes, collapsed buildings, and a trail of human suffering. Understanding the causes, types, and propagation of earthquakes … Read more
Unveiling the Earth’s Secrets: A Deep Dive into P-Waves The Earth, our planet, is a dynamic and complex system, constantly evolving beneath our feet. Understanding its internal structure and processes is crucial for comprehending natural phenomena like earthquakes, volcanic eruptions, and even the formation of continents. One of the key tools in this endeavor is … Read more
Unveiling Earth’s Hidden Depths: Sources of Information about the Interior of Our Planet The Earth, our home, is a dynamic and complex system. While we traverse its surface, the vast majority of its mass remains hidden beneath our feet. This hidden realm, the Earth’s interior, holds secrets about our planet’s formation, evolution, and the processes … Read more