Yasur Volcano
Lighthouse of the Pacific
yasur.com
Dangers at Yasur Volcano, Vanuatu
Yasur is a potentially hazardous volcano. Visitors must realise that approaching the crater is dangerous at any time. Often quoted activity levels are for general scientific classification only, and do not relate to visitor safety. During periods of low activity, there can still be a large eruption without warning.
| Hazards at Yasur Volcano - John Seach |
Projectiles Yasur volcano has not produced a large destructive eruption historically. There is no indication that a large eruption will occur in the near future at Yasur. Magma chamber inflation is currently being accommodated by the volcano. The largest reasonable level of activity expected is the ejection of bombs 3-4 km from the vent, and pyroclastic flows threatening low lying areas near the volcano. This type of activity would pose a danger to nearby villages. |
Ground deformation Yasur volcano has the second greatest level of ground uplift in the world. Since 1000 AD there has been a yearly average uplift of 149 mm. This is only beaten by Iwo Jima volcano in Japan with 200 mm uplift per year since 1200 AD. |
Tsunami Volcanic and tectonic earthquakes, and landslides may result in the production of tsunamis which may threaten coastal populations. |
Flood Lake Siwi broke through its natural dam in 2002 flooding Sulphur Bay Village and destroying houses. |
Landslides Landslide and debris flow pose significant risks to the surrounding population. Uplift of the caldera creates unstable ground, combined with the deposition of unstable ash and cinders. |
Ashfall Periods of strong volcanic activity may cause ashfall over large areas of Tanna Island. Ashfall can damage crops, cause roofs to collapse, and result in mudflows after rain. |
Gas Gas samples collected from the plume crossing Yasur crater rim in 1988 contained SO2 and HCl gases at concentrations between 3 and 9 ppm. This is a hazardous level of gas. This level of SO2 causes a decrease in lung function and immediate irritation of eyes nose and throat. |
Lava Flow Lava flows occur infrequently at Yasur volcano. |
Yasur Photos
Yasur Tours 2008
Yasur is one of the world's most active volcanoes. Join an exciting 3 day adventure tour to the volcano. Departures every day of the year. More details...