Mangaluru prone to earthquakes, says survey

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.

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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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July 22,2020

Bengaluru,  Jul 22: Karnataka Congress president DK Shivakumar on Tuesday said that the state government should give details of the amount it spent on migrants and labourers during the coronavirus crisis if it is transparent.

"The image of Karnataka has come to a very rotten position. We all know that Karnataka has failed in sorting out the problem. Let them (the state government) tell what has been the amount spent on the labour, migrants, food kits on the health department. We want an account (of the expenditure) if they are so transparent," Shivakumar said.

He said that the state government should have approached the hospitals for treating COVID-19 patients and if any hospital refused, a message should have been given that the government would take it over.

He also accused the state government of corruption.

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June 22,2020

Mangaluru, June 22: A chartered flight from Dammam with more than 170 stranded Saudi Kannadiga passengers landed at Mangaluru International Airport at 8.53 pm. 

The flight was chartered by Saudi Kannadigas Humanity Forum (SKHF), an unregistered NGO, which was formed recently to help the Kannadigas stranded in Saudi Arabia due to covid-19 lockdown under the leadership of Zakariya Jokatte, president of Jubail unit of Bearys Chamber of Commerce and Industry and KS Sheikh Karnire, Director of Expertise Contracting Co. Ltd, Saudi Arabia.

There were 165 adults and 8 infants on board the IndiGo flight. All the passengers were screened at the airport. They will be dispatched to quarantine centres after completing formalities. 

SKHF had launched an online portal to assist those who were in need of emergency repatriation such as elderly people, those who lost their jobs, pregnant women and those who are in need of emergency medical treatment back home in India. 

SKHF coordinated with the authorities concerned to carry out all the formalities and legal procedures in Saudi Arabia. SKHF members were present at the Dammam Airport to help the passengers during the departure. 

Mr Jokatte and Mr Sheikh have thanked U T Khader, Mangaluru MLA and Dr Arathi Krishna, former deputy chairperson of NRI forum of government of Karnataka, for their help in chartering the flight.

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April 23,2020

Mangaluru, Apr 23: An astronomical phenomenon, ‘Zero Shadow Day', will be observed in Mangaluru on April 24 and in Udupi on April 25. 

According to a press release from Poornaprajna Amateur Astronomers’ Club, the wonder will commence and people will see their shadows disappear for a few moments at 12:28 pm.

The phenomenon is called as Zero Shadow Day. If a person takes a candle in a dark room and use it to create a shadow of one’s palm on the wall, the hand will cast shadow on the wall as one moves the hand. But when one places the palm on the wall, there will be no shadow.

In the phenomenon, the sun at these times shines exactly above the heads on these days. In astronomy, this point is called as Zenith. The point in the sky directly above an observer at any given location. So it is quite clear now that on Zero Shadow Day, the sun passes through the Zenith as a result of which, all objects will have minimal or no shadow if they are on the ground.

The reason for this happens on some specific days is concerned with astronomy. The earth spins around on its own axis and causes days and nights. It also revolves around the sun causing a year. But the seasons are caused because the axis is tilted at an angle of 23.5 degrees. It is because of this tilt that the sun rises every day in the east gradually moving towards the north till June 21st and then slowly proceeding towards the south till December 21st every year. “We call these days solstice. This means the sun shines between the Tropic of Cancer and Tropic of Capricorn every day passing by the equator on the days we call equinox,” the release stated.

As the earth moves around the sun and revolves on its own axis, for all the people between Tropic of Cancer and Tropic of Capricorn, the Sun at noon moves father and closer to the zenith passing through zenith twice causing two Zero Shadow Days per year. People at Mangaluru will observe this on April 24 and August 18 every year and People in Udupi will observe this on April 25 and August 17 every year.

Places with same latitudes will observe the same days of Zero Shadow but the time would vary with longitude. For example, people of Bengaluru as they share the latitude with Mangaluru will also observe it on April 24. While the people of Mangaluru will observe their shadows disappear at 12.28pm, people of Bengaluru will observe this at 12:17pm. Places like Moodabidri, Bantwal, Sakleshpur and Hassan will also observe Zero Shadow on April 24.

Places like Brahmavar, Karkala, Sringeri, Kudremukha, Chikkamagaluru will observe the Zero Shadow Day on the same day as Udupi on April 25.

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