Seismicity associated with eruptive activity at Langila volcano, Papua New Guinea

Mori, Jim; Patia, H.; McKee, Chris; Itikarai, Ima; Lowenstein, P. L.; Ours, P. de Saint; Talai, B.

doi:10.1016/0377-0273(89)90040-1

Cited by 55 publications

(34 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Dark grey explosion clouds exited the summit crater at a rate of 1-5 per hour and quickly rose several hundred to 2,000 m above the summit. The explosions were not audible 7.5 km from the summit; the audible acoustic energy may have been absorbed or muffled by debris from the previous paroxysmal eruption overlying the fragmentation zone as suggested by (Murata et al 1966) and (Mori et al 1989).…”

Section: Degassing Explosionsmentioning

confidence: 93%

“…Chugging has been documented at many volcanoes that have similar activity and magmatic and volatile contents as Fuego, including Langila (Mori et al 1989), Semeru (Schlindwein et al 1995), Arenal (Benoit and McNutt 1997), Karymsky (Johnson and Lees 2000), and Sangay (Johnson 2007;Lees and Ruiz 2008). Benoit and McNutt (1997) attributed chugging to rhythmic degassing of a gas-charged magma.…”

Section: Degassing During Lava Effusionmentioning

confidence: 97%

See 1 more Smart Citation

Patterns in open vent, strombolian behavior at Fuego volcano, Guatemala, 2005–2007

et al. 2009

View full text Add to dashboard Cite

Fuego volcano, Guatemala is a high (3,800 m) composite volcano that erupts gas-rich, high-Al basalt, often explosively. It spends many years in an essentially open vent condition, but this activity has not been extensively observed or recorded until now. The volcano towers above a region with several tens of thousands of people, so that patterns in its activity might have hazard mitigation applications. We conducted 2 years of continuous observations at Fuego (2005Fuego ( -2007 during which time the activity consisted of minor explosions, persistent degassing, paroxysmal eruptions, and lava flows. Radiant heat output from MODIS correlates well with observed changes in eruptive behavior, particularly during abrupt changes from passive lava effusion to paroxysmal eruptions. A short-period seismometer and two low-frequency microphones installed during the final 6 months of the study period recorded persistent volcanic tremor (1-3 Hz) and a variety of explosive eruptions. The remarkable correlation between seismic tremor, thermal output, and daily observational data defines a pattern of repeating eruptive behavior: 1) passive lava effusion and subordinate strombolian explosions, followed by 2) paroxysmal eruptions that produced sustained eruptive columns, long, rapidly emplaced lava flows, and block and ash flows, and finally 3) periods of discrete degassing explosions with no lava effusion. This study demonstrates the utility of lowcost observations and ground-based and satellite-based remote sensing for identifying changes in volcanic activity in remote regions of underdeveloped countries.

show abstract

Section: Degassing Explosionsmentioning

confidence: 93%

Section: Degassing During Lava Effusionmentioning

confidence: 97%

Patterns in open vent, strombolian behavior at Fuego volcano, Guatemala, 2005–2007

et al. 2009

View full text Add to dashboard Cite

show abstract

“…At a number of volcanoes, volcanic earthquakes and volcanic tremor have been found to have the same spatial and temporal characteristics, suggesting a common source process for these types of seismicity (Fehler 1983;Mori et al 1989;Julian 1994;Chouet 1996). This correlation has recently been further extended to include relationships between classical long-period seismicity and seismicity which is intermediate in character between long-and short-period (Lahr et al 1994;Chouet 1996), and, more recently, all low-frequency seismic events (Neuberg et al 1998).…”

Section: Source Process and Locationmentioning

confidence: 90%

Eruption-induced modifications to volcanic seismicity at Ruapehu, New Zealand, and its implications for eruption forecasting

Bryan

Sherburn

2002

Bull Volcanol

View full text Add to dashboard Cite

Broadband seismic data collected on Ruapehu volcano, New Zealand, in 1994 and1998 show that the 1995-1996 eruptions of Ruapehu resulted in a significant change in the frequency content of tremor and volcanic earthquakes at the volcano. The pre-eruption volcanic seismicity was characterized by several independent dominant frequencies, with a 2 Hz spectral peak dominating the strongest tremor and volcanic earthquakes and higher frequencies forming the background signal. The post-eruption volcanic seismicity was dominated by a 0.8-1.4 Hz spectral peak not seen before the eruptions. The 2 Hz and higher frequency signals remained, but were subordinate to the 0.8-1.4 Hz energy. That the dominant frequencies of volcanic tremor and volcanic earthquakes were identical during the individual time periods prior to and following the 1995-1996 eruptions suggests that during each of these time periods the volcanic tremor and earthquakes were generated by the same source process. The overall change in the frequency content, which occurred during the 1995-1996 eruptions and remains as of the time of the writing of this paper, most likely resulted from changes in the volcanic plumbing system and has significant implications for forecasting and real-time assessment of future eruptive activity at Ruapehu.

show abstract

“…McNutt (1986) and Benoit and McNutt (1997) modeled the source of harmonic tremor as a 1D vertical resonating conduit filled with gas-charged magma, each of the observed spectral peaks representing an eigen-mode of vibration of the oscillator. Mori et al (1989) explained the observations of harmonic tremor at Langila volcano, Papua New Guinea, in terms of a gas-filled resonating volume. The resonance modes of 1D oscillators are controlled by the length of the resonator, the acoustic properties of the fluid, and a set of specified boundary conditions.…”

Section: Introductionmentioning

confidence: 96%

Observations of volcanic tremor during the January–February 2005 eruption of Mt. Veniaminof, Alaska

Angelis

McNutt

2007

Bull Volcanol

View full text Add to dashboard Cite

Mt. Veniaminof, Alaska Peninsula, is a stratovolcano with a summit ice-filled caldera containing a small intracaldera cone and active vent. From January 2 to February 21, 2005, Mt. Veniaminof erupted. The eruption was characterized by numerous small ash emissions (VEI 0 to 1) and accompanied by low-frequency earthquake activity and volcanic tremor. We have performed spectral analyses of the seismic signals in order to characterize them and to constrain their source. Continuous tremor has durations of minutes to hours with dominant energy in the band 0.5-4.0 Hz, and spectra characterized by narrow peaks either irregularly (non-harmonic tremor) or regularly spaced (harmonic tremor). The spectra of non-harmonic tremor resemble those of low-frequency events recorded simultaneously with surface ash explosions, suggesting that the source mechanisms might be similar or related. We propose that non-harmonic tremor at Mt. Veniaminof results from the coalescence of gas bubbles while low-frequency events are related to the disruption of large gas pockets within the conduit. Harmonic tremor, characterized by regular and quasisinusoidal waveforms, has duration of hours. Spectra containing up to five harmonics suggest the presence of a resonating source volume that vibrates in a longitudinal acoustic mode. An interesting feature of harmonic tremor is that frequency is observed to change over time; spectral lines move towards higher or lower values while the harmonic nature of the spectra is maintained. Factors controlling the variable characteristics of harmonic tremor include changes in acoustic velocity at the source and variations of the effective size of the resonator.

show abstract

Seismicity associated with eruptive activity at Langila volcano, Papua New Guinea

Cited by 55 publications

References 6 publications

Patterns in open vent, strombolian behavior at Fuego volcano, Guatemala, 2005–2007

Patterns in open vent, strombolian behavior at Fuego volcano, Guatemala, 2005–2007

Eruption-induced modifications to volcanic seismicity at Ruapehu, New Zealand, and its implications for eruption forecasting

Observations of volcanic tremor during the January–February 2005 eruption of Mt. Veniaminof, Alaska

Contact Info

Product

Resources

About