Triggering of large earthquakes by magma-chamber inflation, Izu Peninsula (Japan)
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Abstract
A close spatial and temporal association between three aseismic uplift episodes and subsequent large (M ≈ 7) earthquakes on the Izu Peninsula, Japan, suggests a causal relation. Quaternary geology, as well as studies by other workers, indicates a volcanic origin for the observed uplift, and we use a simple inflation model constrained by leveling data to compute the expected increments in normal and shear stress across faults that ruptured in the earthquakes. Using a Mohr-Coulomb criterion, we find that in two cases out of three, stress changes induced by inflation are in the correct sense to trigger failure. Although changes are no more than a few bars, they represent the equivalent of several decades to a century of secular stress buildup.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Triggering of large earthquakes by magma-chamber inflation, Izu Peninsula (Japan) |
| Series title | Geology |
| DOI | 10.1130/0091-7613(1982)10<637:TOLEBM>2.0.CO;2 |
| Volume | 10 |
| Issue | 12 |
| Year Published | 1982 |
| Language | English |
| Publisher | GSA |
| Contributing office(s) | Earthquake Science Center |
| Description | 4 p. |
| First page | 637 |
| Last page | 640 |
| Country | Japan |
| Other Geospatial | Izu Peninsula |
| Google Analytic Metrics | Metrics page |