Seismic activity stretched 100 kilometers

"The magnitude-7.3 earthquake that pounded Kumamoto Prefecture early Saturday was more powerful than a foreshock that struck two days earlier.
The seismic activity then moved northeast to reach areas in Oita Prefecture about 100 kilometers away from the focus of the magnitude-7.3 quake. Experts are concerned that quake activities could spread to a major active fault that lies further ahead in that direction.

According to a calculation by Masashi Omata of the Japanese Society for Active Fault Studies, the ground here moved about 20 centimeters vertically, and about two meters horizontally. This measurement was taken in a northeastern section of the Futagawa fault zone, which extends for at least about 64 kilometers.

[link to newsonjapan.com]