Yasur volcano (Vanuatu), activity update: small to moderate activity

During our expedition on Tanna Island, we observed Yasur during 25-29 May. Activity was a low to moderate levels in that period and only 3 vents in the western crater were active although glow from the eastern crater was seen. Near-continuous spattering was seen from the westernmost vent, and more powerful ejections from the other two vents were observed at intervals of 10-15 minutes, throwing incandescent lava bombs to 100-150 m height. Only small amounts of ash were usually produced.
Photos from this activity can be found here.