書誌事項
- 公開日
- 1994-05
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1029/94gl00377
- 公開者
- American Geophysical Union (AGU)
この論文をさがす
説明
<jats:p>An array of nine three‐component broadband seismometers was deployed in two different configurations on Stromboli volcano. The analysis of the seismic wavefield related to volcanic explosions revealed some observations which offer a completely new insight into the internal dynamics of a volcano. These new observations are restricted to the low‐frequency range below 1 Hz and underline, therefore, the superiority of broadband recordings over conventional short‐period observations. Surprisingly simple wavelets indicate an initially contracting source mechanism. Gas‐jets, that could not be seen in a short‐period seismic record at all, generate a clear dilatational wavelet in a broadband recording suggesting the same contracting source mechanism. The analysis of particle motion and seismic array techniques permits a location of the seismic source. We find low‐frequency signals of 3s and 6s period that are not related to eruptions and do not share a common source with the eruption‐related events. A video recording of visible volcanic activity at the crater region allows one to correlate precisely eruptive features with seismic signals.</jats:p>
収録刊行物
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- Geophysical Research Letters
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Geophysical Research Letters 21 (9), 749-752, 1994-05
American Geophysical Union (AGU)
