The Hindu : Andhra Pradesh / Vijayawada News : Experts arrive to study vibrations

Online edition of India's National Newspaper
Wednesday, Sep 15, 2004

Andhra Pradesh

Andhra Pradesh - Vijayawada

Experts arrive to study vibrations

By Our Special Correspondent

VIJAYAWADA, SEPT. 14. The continuous vibrations witnessed in parts of Krishna Lanka area on Sunday night may be a normal "hydrological phenomenon," but the incident appears to have generated a lot of academic interest among experts.

Even as experts from the National Geophysical Research Institute (NGRI) are continuing their studies of the area, representatives of the Indian Meteorological Department (IMD) arrived in the city on Tuesday to study the phenomenon witnessed in the area that is not known for any seismic activity earlier.

Visit to Krishna Lanka

The two-member IMD team led by the Chief Meteorologist, P. Chandra Sekhar Rao, visited Krishna Lanka and its adjoining areas to study their topographic and geological features.

Personal interaction

Accompanied by the officials of the Revenue Department, the experts personally interacted with the residents to have first hand information on the vibrations. The experts during their inspection observed that the vibrations were restricted to a few houses in the locality, while the residents of all other structures, those constructed with pillars in particular, did not feel it.

In an informal chat with reporters who met him later, Mr. Rao ruled out the possibility of any tremors in the area, as they were not recorded by any seismographs positioned at Hyderabad, Visakhapatnam and other places.

"The vibrations are definitely not tremors as there is no evidence. But the exact reasons for their occurrence can be arrived at only after making a detailed study," he said.

No hasty conclusions

When it was pointed out that there was no such incidence even when the barrage received inflows in excess of nine lakh cusecs in 1998, against the current inflows of less than 20,000 cusecs, he said that while the sudden inflow of huge quantities of water into the barrage may be one of the reasons for the vibrations, there were several other parameters that needed to be studied to understand the situation. The IMD had, therefore, decided to interact with all the concerned before arriving at a conclusion.

Meanwhile, the NGRI officials positioned the seismographic equipment at Bhavanipuram and other locations in the city to see whether there would be any further occurrence of such vibrations.

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