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The Eruptions of Mt. Api Siau During 1975
In January ash eruptions accompanied by strong detanations took place 3x, viz. on the 15th, 21.00 loc time on the 17th 06.05 loc time and on the 21st 17.55 loc time. Rumblings were often heard, sometimes lasting for several hours. Glares could be observed at night. The mechanical "Spindler & Hoyer" observatory seismograph with horizontal component recorded 30 earthquakes incl 16 felt.
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