71.   Moderate quakes and other seismic activity are not uncommon in the region, according to the U.S. National Earthquake Information Center in Golden, Colorado.

72.   Officials compared the mountain to a blocked pressure cooker, saying they feared unprecedented seismic activity inside the cone could be signs of a pending eruption.

73.   Oil-rich Azerbaijan and neighboring former Soviet republics in the Caucasus Mountains see frequent seismic activity, but few buildings are reinforced to withstand heavy shocks.

74.   On a few occasions, flights have been canceled due to heavy ash and high seismic activity.

75.   On Wednesday, Gujarat state Chief Minister Narendra Modi said he has asked the IMD to install instruments to measure seismic activity throughout the state.

76.   Pressure between the plates produces seismic activity.

77.   Seismic activity has continued to increase since earlier this year.

78.   Seismologists have predicted a period of intense seismic activity over the next few years.

79.   Seismologists have previously warned that China was entering a period of heavy seismic activity that could produce a devastating earthquake.

80.   Scientists believe further research will show a history of seismic activity in the region dating back centuries.