evidence: March-April explosions. The March and April explosions destroyed most of the former central lava dome and formed a new crater ~ 1 km in diameter and slightly elongate NW-SE. In early June, there were several explosion pits on the floor of the new crater, all of which were filled with boiling water or mud and were emitting vapor. Although heavy rains had compacted the ash, 3-4 m remained at the rim of the new crater. [...] Further Reference. Armienta M.A., De la Cruz-Reyna S., and Macías, J.L., 2000, Chemical characteristics of the crater lakes of Popocatepetl, El Chichón, and Nevado de Toluca volcanoes, Mexico: JVGR 97, p. 105-125. Information Contacts: Silvia Ramos, Monitoreo Volcanológioc y Sismológico, Chiapas, México, Río Cantela 221, Fracc Paraíso II, Tuxtla Gutierrez, Chiapas, México; M. Aurora Armienta, Instituto de Geofisica, UNAM, México 04510, D.F., México.