Manam volcano (Papua New Guinea) activity update 28 Feb - 18 March 2015: seismic unrest

RVO reported that activity at both Manam's Southern Crater and Main Crater was low during 1-18 March although inclement weather made crater observations difficult; no noises were reported. Seismicity had slowly and erratically increased since 28 February, peaked on 13 March and remained at that level through 15 March, and then increased again through 18 March. The seismicity was characterized by small-to-moderate, sub-continuous, and continuous volcanic tremor. ... Read all

Based on observations of satellite imagery and wind data analyses, the Darwin VAAC reported that on 24 February ash plumes from Manam rose to an altitude of 3 km (10,000 ft) a.s.l. and drifted almost 40 km W. ... Read all