Base-line-length variation graph

[Left] Period: 25 July, 1994 to 21 April, 1999

[Right] Period: 1 December, 1999 to 8 May, 1999

Coordinate system: WGS84

Solid circle---- Bernese [IGS Calendar]

Open circle ---- Bernese [Combination Calendar]

Geographical Survey Institute

Seismic Activity in Japan April 1999