Eruption of Piip Crater (Kamchatka)
1968
In autumn of 1966 on the northern slope of Kliuchevskoy volcano a chain of new adventive craters broke out at the height of about 2200 m. Eighty-four hours before the beginning of the eruption a swarm of preliminary volcanic earthquakes had appeared. The number of preliminary shocks was 457 with total energy of 4 × 1017 erg. With the beginning of the lava flow the earthquakes stopped and a continuous volcanic tremor appeared. The total energy of volcanic tremor amounts to 1016 erg. During the eruption numerous explosive earthquakes with the energy of 1015–1016 erg were recorded and besides the microbarograph of the Volcanostation recorded 393 explosions with an energy more than 1013 erg and their total energy was equal to 1017 erg.
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