Smithsonian Institution Global Volcanism Network Bulletin v. 20, no. 7, July 1995 Rabaul (Papua New Guinea) July volcanism and local seismicity both quiet Rabaul New Britain Island, Papua New Guinea 4.27xS, 152.20xE; summit elev. 688 m Activity remained low during July, with only weak-to-moderate fumarolic activity at the summit of Tavurvur, and no reported emissions at Vulcan. Only 11 low-frequency earthquakes originated from the N part of the caldera. There were 7 high-frequency (M < 1) earthquakes, mostly from the Namanula Hill and Karavia Bay areas in the NE and SW portions of the caldera. Two unusual "hybrid" earthquakes occurred in July. The associated signals had very high-frequency impulsive onsets, and low-frequency codas (1.2 Hz) that lasted > 1 minute. At distant stations, only the low-frequency signals were registered. The first earthquake, on 3 July, occurred at 3 km depth off the S shore of Matupit Island close to the area of maximum ground deformation. The second, a much smaller hybrid earthquake, occurred on 25 July and was likely from the Vulcan area. Ground deformation measurements showed little or no change throughout July. Information Contact: Ben Talai, Rabaul Volcano Observatory, P.O. Box 386, Rabaul, Papua New Guinea.