Different Types of Earthquake
- On the Basis of the depth of their Foci, there are three earthquake types, they are Deep-focus earthquakes, Intermediate focus earthquakes, and Shallow-focus earthquakes.
- Deep-focus earthquakes: This type of earthquakes occur at depths exceeding 300kms.
- Intermediate focus earthquakes: They occur with the depths of the focus ranging between 55Kms and 300Kms.
- Shallow-Focus earthquakes: It occurs with the depth of focus, less than 55Kms.
Earthquake types of waves and Characteristics:
- When Earthquake occurring time, there will be many vibrations spreads outwards in all direction from the focus point, it is known as Earthquake Waves.
- These waves are classified into three types they are Primary waves, Secondary waves, and Long waves.
this waves commonly abbreviated as
P-waves: Primary waves
S-waves: Secondary Waves
L-waves: Long Waves
Characteristics of Earthquake waves:
- The primary waves faster than secondary waves, like primary waves travels 1.7 times faster than secondary waves.
- The Main cause of primary waves, it makes vibration of a rock particle to the backward and forward direction in the wave direction.
- The P-waves are the first waves, gets recorded in the earthquake station, since its fastest waves among the other earthquake waves.
- The Secondary waves cause the particles to oscillate at 90 degrees to the wave direction.
- The primary and secondary waves converted into long Waves.
- The Long waves either travel along surface horizontally at 90 degrees or travel sea waves.
- Long waves are the very danger, great loss of destruction occurs due to long waves and it produces shocking violent waves.
- The Primary waves can pass through any media.
- The secondary waves cannot traverse the liquid.
The Incidence of Earthquakes in India:
- Koyana earthquakes and the Latur earthquake in Maharashtra, 1967 and 1993 respectively.
- Uttar Kashi earthquakes occurred in Uttar Pradesh in 1992.
- The Bhuj earthquake occurred in Gujarat in 2001.
- The earthquake occurred in Jammu and Kashmir in 2005.