Wednesday 4th September, The Observatory

After lunch we visited the volcano observatory. Our guide gave us so much information and we even heard the volcano rumbling. We also saw the Seismogram drum recorders. As the drum revolves the pen shifts to record traces of earthquakes or noise signals within one day. These have been replaced by computers in some places, but they use both in Rabaul. There was lots if ash in the sky that nearly hid the Mother Volcano.