1968 eruption Cerro Negro

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eruption of cerro negro in 1968


the volcanic activity october 23 until december 10, 1968 marked formation of cristo rey crater, when summit , south flank of cerro negro erupted sub-plinian vei of 3. new vent formed lava flow 750m long , 600m wide , thickness of 3m. thirteen villages located near erupting volcano evacuated on 27th because of excessive ash falls. additional larger-scale evacuations nicaragua’s 2nd largest city, león, recorded ash falls of on 1 cm thick. lava flows advanced @ rate of 23 m/day, , caused additional land damage lava poured 3 of cerro negro’s craters, fountaining heights of 30m air. eruptive ash columns reached heights of 2.3 4.8 km. in addition, incandescent gases vents raised heights of 120 meters, , these seen on 50 km away volcano. when volcanic activity ceased, lava volume totaled 6.9 x 10 m , tephra volume totaled 2.7 x10 m.







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