Kilburn, CRJ;
Sammonds, PR;
(2005)
Maximum warning times for imminent volcanic eruptions.
Geophysical Research Letters
, 32
(24)
, Article L24313. 10.1029/2005GL024184.
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Abstract
Accelerations in seismicity are important precursors to eruptions at volcanoes reawakening after extended repose intervals. These have previously been quantified for subduction-zone settings in terms of the linkage of crustal faults by shearing. Introducing a damage-mechanics criterion for the weakening of rock between major fractures, the model is here modified for failure in tension, consistent with conditions in crust surrounding a pressurized magma reservoir. The results indicate that final accelerations develop over similar to 2-3 weeks at tensile strains of (4.5 +/- 3.2)x10(-3). Since a week or more is required to identify an accelerating trend, seismic forecasts of eruptions after long repose are unlikely to be reliable more than days in advance. Improvements will require the integration of additional precursors or extension of the model to earlier stages of fracture growth in stressed crust.
| Type: | Article |
|---|---|
| Title: | Maximum warning times for imminent volcanic eruptions |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1029/2005GL024184 |
| Publisher version: | http://dx.doi.org/10.1029/2005GL024184 |
| Language: | English |
| Additional information: | Copyright 2005 by the American Geophysical Union |
| Keywords: | Silicic magma chambers, Precursor |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/8815 |
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