Since then, the young cone Tavurvur located inside the caldera has been the site of near persistent activity in form of strombolian to vulcanian ash eruptions. Pyroclastic flows were formed throughout the first few days of the eruption. The eruption column was usually ~1-2 km high. The base of the Tavurvur sequence was marked by a blue-grey very fine ash that appeared to be rich in sulphides. Intermittent strombolian to vulcanian-type explosions continue at the Tavurvur volcano. "SO2 emission rates from Tavurvur were measured in the period from 29 September to 6 October by Stan Williams (Arizona State Univ). to RVO). On the morning of September 19, 1994, two volcanic cones - Vulcan and Tavurvur - began erupting on the opposite side of the harbour from the town. At midnight, RVO advised the Provincial Disaster Committee that an eruption was imminent. This was subsequently issued at 1815. Nearby Rabaul Town was covered with ash as thick as 1.5 m (5 ft), and an estimated 90,000 people were displaced from the area. Satellite imagery. The outer flanks of the highest peak, a 688-metre-high asymmetrical pyroclastic shield, are formed by thick pyroclastic flowdeposits. This image shows the plume wafting toward the southeast, over St. George’s Channel. "Soon after dawn on 19 September (0600), it was clear that an eruption was imminent because offshore areas had emerged. It was feared that announcement of a higher stage of alert might be counter-productive. "At Vulcan, at least four vents were active. At 0743, ballistic ejecta were seen landing in the water up to 1 km from the E shore of Vulcan. "A similar spreading pattern was seen on images (IR channel 4) from the NOAA-12 polar orbiting satellite (19:08). Date: 1994: Source: Aftermath of volcano eruption, Rabaul, PNG, 2009. The 1994 eruption of Rabaul devastated much of the town of Rabaul, with ash deposits as thick as 2 m. The power supply was shut down at the start of the eruption but large sections of the electrical distribution system were damaged by falling-trees and buildings. Vulcan's eruption ended on 2 October. Precursory activity. An eruption of Rabaul in 1994 destroyed Rabaul city, the largest town on New Britain Island. The Rabaul caldera, or Rabaul Volcano, is a large volcano on the tip of the Gazelle Peninsula in East New Britain, Papua New Guinea, and derives its name from the town of Rabaul inside the caldera. Rabaul is a township in East New Britain province, on the island of New Britain, in the country of Papua New Guinea.It lies about 600 kilometres to the east of the island of New Guinea.Rabaul was the provincial capital and most important settlement in the province until it was destroyed in 1994 by falling ash from a volcanic eruption in its harbor. New eruptions began on 19 September 1994, ending a repose period of ~51 years. Throughout the late afternoon a voluntary evacuation of the town had developed, but the release of the Stage 2 alert accelerated the process. It has produced major explosions during historical times, including large eruptions in 1878 and 1994. Late in the Tavurvur sequence was a pumiceous unit that may be sub-Plinian. During the eruption, ash was sent thousands of metres into the air and the subsequent rain of ash caused 80% of the buildings in Rabaul to collapse. The timing and scale of the 1994 Rabaul tsunamis accompanying the eruption of Vulcan and Tavurvur volcanoes were estimated from the temporal and spatial distribution of tsunami deposits. The Moderate Resolution Imaging Spectroradiometer on NASA’s Aqua satellite took this picture the same day. Only one vent was active. Sequence of felt earthquakes and decline of eruption. Jim Lynch (NOAA Synoptic Analysis Branch) provided the following satellite interpretation. 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