1. Wednesday, the National Institute of Geophysics and Vulcanology said in a statement. 2. The National Institute of Geophysics and Vulcanology said the eruption could go on for weeks. 3. The strongest had a 4.2 magnitude, said the National Institute of Geophysics and Vulcanology . 4. The eruption was confirmed by the Indonesian government's Centre for Vulcanology and Geological Hazard Mitigation. 5. Followup to Talk : Vulcanology .-- Merphant 02 : 31 1 Jun 2003 ( UTC) 6. The strongest quake had a 4.2 magnitude, said the National Institute of Geophysics and Vulcanology . 7. Since August 3, 2011 Alert Level has been established by Center of Vulcanology and Mitigation Geology Disaster. 8. The strongest quake was magnitude-4.2, according to the National Institute of Geophysics and Vulcanology . 9. The earthquake had a 4.6 magnitude, said the National Institute of Geophysics and Vulcanology in Rome. 10. The research departments of the museum are biodiversity and evolutionary biology, evolutionary ecology, paleobiology, vulcanology and geology.