Ulawun Volcano Eruptions - John Seach


Ulawun volcano is one of the worlds most dangerous volcanoes. It has structural instability and is close to population centres.



Year Comments
1700 The first recorded eruption by Dampier.
1915 Large eruption deposited 10 cm of ash at Toriu, 50 km northeast of the volcano.
1970 Large eruption produced nuees ardentes and lava flows. The eruption devastated the NW flank of Ulawun and modified the summit crater.
1973 Lava flows and emissions from five vents.
1978 Large eruption, lava flow, ash, nuée ardente. Flank eruption which may indicate structural instability.
1980 Eruption ejected ash to 60,000 ft and produced pyroclastic flows which swept all flanks of the volcano and devastated an area of 20 sq km. 
1983 Mild explosive activity.
1984 Explosions, ash clouds, strombolian eruption, Incandescent tephra.
1985 Strombolian eruptions, lava flows, tephra ejection.
1989 Ash emissions to 2 km altitude.
1993 Eruption column to 1,000 m above summit.
1994 Weak red glow from the summit.
1999 Explosions.
2000 Eruption on 29 September resulting in evacuation of nearby towns. eruption during 28 September-2 October 2000 sends a plume to 10-12 km.
2001 Eruption on 30 April 2001 sends an ash cloud to a height of ~13.7 km.
2002 Ash eruptions.
2003 Intermittent ash eruptions.
2005 Increasing activity. Faint plume visible in March.
2006 Ash to 10,000 ft in March.
2007 Ash emissions in January