81.   Seismic activity has increased in recent weeks at the Soufriere Hills volcano, and scientists have placed the Caribbean island on alert to prepare for a possible eruption.

82.   Seismic activity near a former Soviet nuclear weapons test site has prompted Norway to ask Moscow to explain the incident, the foreign ministry said Thursday.

83.   Seismic activity there is not unusual.

84.   Seismologists have not ruled out the possibility of the tremors being a prelude to a stronger quake, but stress there is no sure way to predict seismic activity.

85.   Scott said seismic activity within the volcano had been building for four days before the latest outburst.

86.   Seismic activity detected near a former Soviet nuclear test site set off alarm bells Thursday in the United States and Norway.

87.   Seismic activity has increased in other areas recently as well.

88.   Seismic activity has increased in recent days around the Kuril Islands.

89.   Takao Kimihira of the local Meteorological Observatory in Muroran, near Usu, said seismic activity was intensifying because of the movement of magma underground.

90.   Such shifts can result from seismic activity, and if watched closely enough could provide signals of impending earthquakes.