USGS
10th May 2011, 08:30
CVGHM reported that during January-April diffuse white plumes from Gamkonora rose 25-100 m above the crater rim. Seismicity increased during 29 April-3 May. On 1 May, white plumes rose 150 m above the crater rim. The next day, white plumes rose 300 m above the crater rim and incandescence from the crater was observed. Residents near the volcano's base noted a sulfur smell. The Alert level was raised to 2 (on a scale of 1-4).
Source: Center of Volcanology and Geological Hazard Mitigation (CVGHM)
More... (http://www.volcano.si.edu/reports/usgs/index.cfm?wvarweek=20110427#gamkonor)
Source: Center of Volcanology and Geological Hazard Mitigation (CVGHM)
More... (http://www.volcano.si.edu/reports/usgs/index.cfm?wvarweek=20110427#gamkonor)