What are the four types of seismic zones?
The four zones of earthquake in India, as discussed below:
- Seismic Zone II: Zone II is classified as the low-damage risk zone.
- Seismic Zone III: Seismic Zone 3/III is classified as the moderate-damage risk zone.
- Seismic Zone IV: Zone IV is considered the high-damage risk zone.
What do you mean by seismic zones?
A seismic zone is used to describe an area where earthquakes tend to focus; for example, the New Madrid Seismic Zone in the Central United States. A seismic hazard zone describes an area with a particular level of hazard due to earthquakes.
What is a seismic zone 3?
Zone 3. This zone is classified as a Moderate Damage Risk Zone which is liable to MSK VII. The IS code assigns a zone factor of 0.16 for Zone 3. Several megacities like Chennai, Mumbai, Kolkata and Bhubaneshwar lie in this zone.
How seismic zones are classified?
According to Modified Mercalli scale, the seismic zone intensity are classified as zone II (low intensity zone), zone III (moderate intensity zone), zone IV (severe intensity zone) and zone V (very severe intensity zone).
What is meant by seismic zone 4?
Next, the values on the seismic-risk map are figured this way: If you live in seismic zone 4, you have a one in ten chance that an earthquake with an active peak acceleration level of 0.4g (4/10 the acceleration of gravity) will occur within the next fifty years.
How many seismic zones are?
four zones
The whole country has been divided into four zones viz. zone V, IV, III and II according to the seismic zoning map of India prepared by Bureau of Indian Standards (BIS) based on the historical seismicity and strong ground motions. Out of these zones, Zone V exhibits the highest seismic risk and zone II has the least.
What are seismic zones give any two examples?
Examples
- Charlevoix Seismic Zone (Quebec, Canada)
- New Madrid Seismic Zone (Midwestern United States)
- South West Seismic Zone (Western Australia)
What is seismic zone C?
Seismic Design Category C – Corresponds to buildings of Occupancy Groups IV ( Hospitals, Police Stations Emergency control centers etc) I where expected ground shaking will be MODERATE AND buildings of occupancy categories I, II, and III where MORE SEVERE ground shaking will occur.
How many seismic zone are there?
four seismic zones
As per the seismic zoning map of the country, the total area is classified into four seismic zones. Zone V is seismically the most active region, while zone II is the least.
What is a seismic zone 1?
Likewise, if you live in zone 1, you have a one in ten chance that an earthquake with an active peak acceleration level of 0.1g (1/10 the acceleration of gravity) will occur within the next fifty years.
What is seismic zone class 7?
Answer : The boundaries of the plates, which are considered to be weak zones, are most susceptible to earthquakes. These weak zones are called seismic zones or fault zones.
What are the 3 major earthquake zones of the world?
The Earth has three major earthquake zones. The first large area known as the Pacific Ring of Fire. The second major earthquake zone is along the mid-ocean ridges. The third major earthquake zone is the Eurasian-Melanesian mountain belt.
What is seismic Class D?
Seismic Design Category D -Corresponds to buildings and structures in areas expected to experience severe and destructive ground shaking But NOT located close to a major fault.
What is the importance of seismic zoning?
Seismic zonation is useful for hazard reduction such as earthquake-resistant design of structures, risk analysis, land-use planning, etc. Many earthquake-prone countries developed seismic zonation maps.
What is the importance of seismic zone mapping?
Importance of India’s Seismic Zoning Map
An Indian seismic zoning map assists one in identifying the lowest, moderate as well as highest hazardous or earthquake prone areas in India. Even such maps are looked into before constructing any high rise building so as to check the level of seismology in any particular area.
What are the 3 types of earthquakes for Class 7?
There are three types of earthquake waves or seismic waves.
- P waves or longitudinal waves.
- S waves or transverse waves.
- L waves or surface waves.
How many seismic zones are in India?
What is seismic Site Class C?
Sites consisting predominately of very dense glacial tills, sands, gravels, and soil sites with very shallow rock often qualify as Site Class C. When shallow foundations are allowed for a building on a soil site, Site Classes C and D are generally applicable, with Site Class D being more common.
What are the 10 effects of earthquake?
How do Earthquakes Cause Damage
- Ground Shaking & Structural Failure. Ground shaking is the vibration of the ground during an earthquake.
- Surface Rupture & Ground Displacement. The primary earthquake hazard is surface rupture.
- Landslides.
- Liquefaction.
- Tsunamis.
- Fires.
- Earth Shaking.
- Surface Rupture.
What are the 10 causes of earthquake?
Seismic Waves.
Which are the 4 seismic zones of India?
Based on the past seismic history, Bureau of Indian Standards grouped the country into four seismic zones namely Zone-II, Zone-III, Zone-IV and Zone-V. Of all these four zones, Zone-V is the most seismic active region whereas Zone-II is the least.
What is seismic Category B?
For Seismic Design Category (SDC) B, which designates a low seismic hazard region, structural engineers still need to complete a full seismic design process to meet the building code requirements.
What is SS and S1 in seismic?
Ss: Spectral acceleration parameter at short periods corresponding to the mapped maximum considered earthquake. S1: Spectral acceleration parameter at a period of 1 sec corresponding to the mapped maximum considered earthquake.
What are the 3 types of earthquakes?
Three Kinds of Earthquakes
- Shallow fault earthquakes. A fault is a break in the rock beneath our feet.
- Subduction zone earthquakes. The largest earthquakes ever recorded are subduction zone earthquakes.
- Deep earthquakes. Deep earthquakes occur in the subducting ocean slab, deep beneath the continental crust.
Which country has earthquake?
Indonesia is in a very active seismic zone, also, but by virtue of its larger size than Japan, it has more total earthquakes. Which country has the most earthquakes per unit area? This would probably be Tonga, Fiji, or Indonesia since they are all in extremely active seismic areas along subduction zones.