"The government decided to further expand the regulation to include buildings that are two stories or higher, considering recent indications that the country's geological characteristics make such structures especially vulnerable to earthquakes," it added.

Currently, only buildings that are three stories or higher are required to be earthquake-resistant.

Starting next year, buildings that are 16 stories or higher must have their designs verified and show how strong a quake they can withstand, the ministry said.

Those with 50 stories or more will be subject to an additional safety evaluation that will also check the possible effect on the surrounding structures and environment in case of a quake.

The ministry said a public notice of the proposed revision will be announced Thursday with the government seeking to legislate the revision early next year.

Meanwhile, a local researcher noted problems with existing structures.

Lee Young-hwan, a senior researcher at the Construction Economy Research Institute, said the government earlier planned to reinforce a total of 127,306 existing public facilities to make them more earthquake-resistant, but only 42.4 percent, or 51,088 of them, had actually been reinforced by the end of 2014.

Such a problem was more serious for schools as 78 percent of, or 15,653 out of a total 20,131, school buildings in the country failed to meet safety requirements in terms of earthquake-resistance, the researcher said while speaking at a seminar in Seoul.

Also, about 40 percent of the all railways on Seoul metropolitan subways lines 1 through 4 are not currently earthquake-proof.

"Subway lines 1 through 4 have a combined total of 7.3 million daily users and 1.5 billion users per year, which means a strong enough earthquake could lead to heavy casualties," Lee said. "The country must work to reinforce the entire length of subway railways at the earliest date possible." (Yonhap)