51.   Over the past year, two major Japanese volcanoes have erupted.

52.   Scientists warned, though, that the volcano will probably erupt again within two weeks.

53.   The Manam volcano erupts regularly and had been rumbling for more than a month before blowing its top this week.

54.   The Manam volcano erupts regularly.

55.   The Popocatepetl volcano erupted with a spew of ash and gas on Tuesday, sending a rain of fine ash over at least five small towns nearby.

56.   The volcano has been erupting sporadically since early last month.

57.   The volcano has erupted repeatedly in recent years.

58.   The volcano erupted late Friday but appeared calm Saturday morning.

59.   The volcano erupts daily, spewing searing avalanches of rock and gas that barrel through abandoned towns and raining pebbles on inhabited areas of the central-west coast.

60.   The volcano has been erupting since Monday.