Source mechanism of very-long-period signals accompanying dome growth activity at Merapi volcano, Indonesia
Geophysical Research Letters
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Abstract
Very-long-period (VLP) pulses with period of 6–7s, displaying similar waveforms, were identified in 1998 from broadband seismographs around the summit crater. These pulses accompanied most of multiphase (MP) earthquakes, a type of long-period event locally defined at Merapi Volcano. Source mechanisms for several VLP pulses were examined by applying moment tensor inversion to the waveform data. Solutions were consistent with a crack striking ∼70° and dipping ∼50° SW, 100m under the active dome, suggest pressurized gas transport involving accumulation and sudden release of 10–60 m3 of gas in the crack over a 6s interval.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Source mechanism of very-long-period signals accompanying dome growth activity at Merapi volcano, Indonesia |
| Series title | Geophysical Research Letters |
| DOI | 10.1029/2002GL015013 |
| Volume | 29 |
| Issue | 23 |
| Publication Date | December 11, 2002 |
| Year Published | 2002 |
| Language | English |
| Publisher | Wiley |
| Contributing office(s) | Volcano Science Center |
| Description | 4 p. |
| First page | 33-1 |
| Last page | 33-4 |
| Country | Indonesia |
| Other Geospatial | Merapi volcano |
| Google Analytic Metrics | Metrics page |