Tsukuba Scientist Comments on Quake
According to an analysis conducted by Associate Prof. Yuki Sakai of Tsukuba University, the seismic wave of Sunday’s earthquake had a frequency cycle of one to two seconds, which causes particularly violent shaking of wooden houses.
A seismic wave with a cycle of a second, dubbed a killer pulse, caused catastrophic damage in the Great Hanshin Earthquake in 1995. The seismic wave Sunday was the strongest since the Great Hanshin Earthquake and the Niigata Prefecture Chuetsu Earthquake in 2004.
Read the full article: Quakes’ seismic waves worst for wooden buildings