Renewed inflation of Long Valley Caldera, California (2011 to 2014)
Links
- More information: Publisher Index Page (via DOI)
- Open Access Version: Publisher Index Page
- Download citation as: RIS | Dublin Core
Abstract
Slow inflation began at Long Valley Caldera in late 2011, coinciding with renewed swarm seismicity. Ongoing deformation is concentrated within the caldera. We analyze this deformation using a combination of GPS and InSAR (TerraSAR-X) data processed with a persistent scatterer technique. The extension rate of the dome-crossing baseline during this episode (CA99 to KRAC) is 1 cm/yr, similar to past inflation episodes (1990–1995 and 2002–2003), and about a tenth of the peak rate observed during the 1997 unrest. The current deformation is well modeled by the inflation of a prolate spheroidal magma reservoir ∼7 km beneath the resurgent dome, with a volume change of ∼6 × 106 m3/yr from 2011.7 through the end of 2014. The current data cannot resolve a second source, which was required to model the 1997 episode. This source appears to be in the same region as previous inflation episodes, suggesting a persistent reservoir.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Renewed inflation of Long Valley Caldera, California (2011 to 2014) |
| Series title | Geophysical Research Letters |
| DOI | 10.1002/2015GL064338 |
| Volume | 42 |
| Issue | 13 |
| Year Published | 2015 |
| Language | English |
| Publisher | American Geophysical Union |
| Publisher location | Washington, DC |
| Contributing office(s) | Volcano Science Center |
| Description | 8 p. |
| First page | 5250 |
| Last page | 5257 |
| Country | United States |
| State | California |
| Other Geospatial | Long Valley Caldera |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |