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| Title: |
INFLATION AND TILTING BEFORE ERUPTION |
| Caption: |
(a) Idealized diagram of Kilauea volcano in Hawai'i illustrating inflation and surface tilting as magma moves up. The red area is the underground magma chambers that fill before an eruption. (U.S. Geological Survey Circular 1073, 1992) (b) Graphs showing the tilting of the surface of Kilauea in two directions, the east-west component and the north-south component, from 1964 to 1966. Notice the slow increase in ground tilt before an eruption and rapid subsidence, or lowering of the land surface, during eruption. (From Fiske, R. S., and Koyanagi R. Y. 1968. U.S. Geological Survey Professional Paper 607) |
| Keywords: |
volcanoes, volcanism, volcanic eruptions, lavas, magmas, shield volcanoes, Kilauea, Hawaiian Islands, mantle plumes, hot spots |
