Source mechanism of very-long-period signals accompanying dome growth activity at Merapi volcano, Indonesia
January 1, 2002
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.
Citation Information
Publication Year | 2002 |
---|---|
Title | Source mechanism of very-long-period signals accompanying dome growth activity at Merapi volcano, Indonesia |
DOI | 10.1029/2002GL015013 |
Authors | D. Hidayat, B. Chouet, B. Voight, P. Dawson, Antonius Ratdomopurbo |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Geophysical Research Letters |
Index ID | 70023916 |
Record Source | USGS Publications Warehouse |
USGS Organization | Volcano Science Center |