Smithsonian Institution Global Volcanism Network Bulletin v. 20, no. 9, September 1995 Rincon de la Vieja (Costa Rica) Seismic activity continues at a rate of tens of events per month Rincon de la Vieja Costa Rica 10.83N, 85.33W; summit elev. 1,916 m The seismic receiver at the remote Rincon de la Vieja volcanic complex (RIN3) is located 5 km SW of the active crater. During August it registered 42 events at frequencies below 1.5 Hz; during September, 28 events with frequencies below 2.5 Hz. Information Contacts: E. Fernandez, E. Duarte, R. Saenz, W. Jimenez, and V. Barboza, Observatorio Vulcanologico y Sismologico de Costa Rica, Universidad Nacional (OVSICORI-UNA), Apartado 86- 3000, Heredia, Costa Rica.