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Mangaluru prone to earthquakes, says survey

[email protected] (DHNS)
May 6, 2015

Mangaluru, May 6: According to an experts survey, it has been found that buildings in Bejai-Balmatta, Attavar -Hampankatta, have not adhered to IS 1893 : 2002, Part 1, which is the criteria for earthquake resistant design of structures, NITK?Civil Engineering Department Professor D Venkat Reddy said.

He was delivering a talk on ‘Earth, oceans and coastal zone management’, organised by Institution of Engineers (India) local centre an Institution of Valuers Mangalore Branch in Mangaluru.

mangalurucity

The city falls in seismic zone-3 which means that the quakes of intensity six could occur. The buildings could withstand the earthquakes up to five in the Richter scale. As per Indian Standards on Earthquake Engineering, IS1893:1984 criteria for Earthquake Resistant Design of Structures, the country has been categorised into five seismic zones, based on the seismic intensity. IS is about earthquake resistant design of structures and is applicable to buildings, and other structures such as bridges, dams etc. Earthquakes of magnitude of eight take place in zone five. Nethravathi and Gurupur river basins are tectonically active.

As observed in Nepal, the structural failure of buildings have caused more amount of damage. In contrast, the Pashupathinath Temple is intact, though the building in its surrounding have been badly effected, which is due to the difference in structural pattern.

He further said that seismic waves alone are not responsible . Seismic activities take place round the clock. The earthquakes take place due to the sudden failure of strata. As per an estimation, around one thousand take place across the world everyday and three of them could be serious.

A lineament which is a fault in the underlying geological structure and the constructions on these lineaments such as railway tracks, bridges etc could cause more danger. IIS?has established a network system which records the seismic activities and which can even record 0.1 mm change in the crest of the earth. As per the movement of earth plates, a region will be displaced in a span of hundred years.

Comments

Arjun Neil Menezes
 - 
Tuesday, 20 Feb 2018

I'm building a 1story house with slab on load bearing walls instead of the concrete frame structure. Will this be resistant agaianst earthquakes?

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News Network
May 4,2020

Bengaluru, May 4: Former Karnataka chief minister HD Kumaraswamy on Sunday said that the health of the migrants who have been allowed to move, should not be jeopardized and appropriate tests must be conducted.

"The task was to send the workers to their places. However, their health should not be jeopardized. This decision made for their benefit should not be a travesty for them. There will also be physical interference on the buses and appropriate tests must be done," said Kumaraswamy.

"The lockdown, which was implemented without any prerequisites, is now loosened without warning. The state government, which has allowed migrant workers to move to the city, has mobilized large numbers of people. By this, the government is playing with their health," he added.

He continued saying that the government should not lose out on an unscientific move that resulted in the loss of thousands of crores of rupees from a custodial lockdown.

"Workers and villages must be sober. The government must take all necessary precautions in this regard," he added.

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News Network
May 9,2020

Bengaluru, May 9: With 41 new cases of COVID-19 reported on Saturday, the total number of positive cases in Karnataka has reached 794, said the state Health Department.

Out of the total number, 386 are discharged and 30 patients have passed away. The total number of active cases now in Karnataka is 377.

The total number of positive coronavirus cases across the country is 59,662, including 39,834 active cases.

Till now, 17,846 patients have been cured and discharged and 1,981 deaths have been recorded in the country, as per the data provided by the Union Ministry of Health and Family Welfare. 

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News Network
May 18,2020

Bengaluru, May 18: Karnataka Chief Minister BS Yediyurappa on Monday said that people from Gujarat, Maharashtra, Kerala and Tamil Nadu will not be allowed in the state till May 31.

"We have decided not to allow entry of people from Gujarat, Maharashtra, Kerala and Tamil Nadu till May 31," Yediyurappa said after a meeting with state ministers and senior government officers to discuss the guidelines issued by the Centre regarding the fourth phase of nationwide lockdown.

"State road transport corporation buses in Karnataka and private buses will run. Strict lockdown measures in containment zones and economic activities will be permitted in other areas. Sundays will be total lockdown across the state. Home quarantine will be strengthened," he added.

The Chief Minister further said that all shops will be allowed to open and all trains running within the state will be permitted.

The central government on Sunday extended the ongoing COVID-19 induced nationwide lockdown till May 31, but with a set of new relaxations commencing from Monday. The Union Home Ministry has also given powers to States/UTs demarcate areas in Green, Orange and Red zones, which will allow them to start activities except in containment zones.

According to the guidelines, "all other activities will be permitted except those which are specifically prohibited under these guidelines. However, in containment zones, only essential activities shall be allowed, as mentioned earlier."

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