KARACHI - Earthquake or tsunami of a moderate magnitude can bring disaster to the metropolitan. Karachi is situated on the moderate seismic zone which rises concern among the citizens," said Muhammad Riaz, chief meteorologist. Talking to The Nation on Saturday, he said: "All over the world, the earthquakes of moderate magnitude are not much devastating. It is notable that the magnitude of such earthquakes stands between 5 and 6. The epicentre of the earthquake may have damages but over all, the areas adjacent can bear this magnitude." He said: "This is because of the standard of building material. All over the world, there are standards of building codes which are strictly followed by the constructors. This has brought down the rate of devastation in the areas which are on the seismic zone, after any such earthquake." "We are unfortunate, as there are rules and regulations prescribed by the building control authority. But these rules and regulations are normally being violated by the constructors. They use sub-standard material. This makes the situation very dangerous for the people living in those buildings, as most of these buildings are residential," he added. Riaz said: "It should be observed by the government authorities that the international code of conduct for building high rise apartments should be followed. Lives of our citizens is more important and it should be safeguarded at any cost." It is noteworthy that during the two weeks time, at least five minor earthquake shocks have been reported on the rector scale of Karachi met office. Last week citizens of Landhi, Malir, Korangi and Steel Town felt shocks of earthquake which was recorded by the rector scale. According to the met office, these were the shocks of minor magnitude and measured as 2.0 and 2.4 on the rector scale. These were reported in the eastern part of the City and fault belt from Karachi to Thatta was the epicentre of these shocks. One of the sources in the met office informed that sea earthquake was also witnessed in the Arabian Sea, the same night. But its magnitude was recorded as 4.3 on rector scale and its depth was not more than 10 kilometre in the sea due to which rough waves were not being observed in the sea. It may be noted that old parts of the City including Kharadar, Saddar, Lyari, Tower, Gulistan-e-Johar, Guslahn-e-Iqbal, North Karachi, Nazimabad, and various other parts of the City where hundreds of high rises have been built. "If tsunami of moderate or high magnitude is generated in the sea, then it will take 30 minutes to reach the coastal area of the City. We have the instruments that can detect the magnitude of earthquake but shocks resulting after tsunami, can also be detected. Our duty is to inform DCO, Disaster Management Authority and chief secretaries of Sindh and Balochistan," he expressed. It is noteworthy that in 1962, earthquake of 5.6 magnitude had hit the City. In 1945 when tsunami hit Makran Coastal Belt, Karachi was also affected. The magnitude was recorded as 8.6 on the rector scale.