Niu, Jieming;
Song, Teh-Ru;
(2022)
Validation of Repetitive Volcanoseismic Signals in Aso Volcano, Japan With Distant Stations: Implications of Source Characterization and Remote Sensing in Uninstrumented Volcanoes.
Journal of Geophysical Research: Solid Earth
, 127
(5)
, Article e2021JB023400. 10.1029/2021JB023400.
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Abstract
Repetitive volcano-seismic signals, including very long-period signals (VLP) and long-period signals (LP), provide a unique probe of fluid transport processes inside magmatic plumbing system. While syn-eruptive signals are often detected and analyzed with regional or/and global seismic networks to retrieve eruption location and mechanism, repetitive non-eruptive volcano-seismic signals are generally small, and they are typically detected with in-situ stations near the volcanic edifices. Here, we show that repetitive VLP and synchronous deformation events in Aso volcano, Japan, can be detected in the high (15-30 s) and low (50-100 s) VLP bands, respectively, at seismic stations located ∼30-1000 km away from their sources. Changes in the polarities, phases, and amplitudes of VLP and synchronous deformation events observed at the in-situ stations can be verified by the seismic waves in the two VLP bands, respectively, at distant stations up to 150 km. Forward modeling of the amplitude decay in the two VLP bands against epicentral distance corroborates the source locations previously determined by the in-situ data, whereas the joint data analysis of in-situ and distant stations at high VLP band suggests the presence of single-force component (i.e., force/moment ratio of 10-4 m-1) in the source of VLPs. We advocate that not only can systematic data mining against established global and regional seismic networks potentially expand the detection capability of repetitive volcano-seismic signals backward in time when in-situ observations were unavailable, but it could also substantially improve the detection and monitoring capacity in otherwise un-instrumented volcanoes, complementary to remote sensing of ground deformation.
| Type: | Article |
|---|---|
| Title: | Validation of Repetitive Volcanoseismic Signals in Aso Volcano, Japan With Distant Stations: Implications of Source Characterization and Remote Sensing in Uninstrumented Volcanoes |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1029/2021JB023400 |
| Publisher version: | https://doi.org/10.1029/2021JB023400 |
| Language: | English |
| Additional information: | Copyright © 2022. The Authors. This is an open access article under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
| UCL classification: | 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 UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10148315 |
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