Temporal and spectral characteristics of seismicity observed at Popocatepetl volcano, central Mexico

Arciniega-Ceballos, A.; Valdés‐González, C.; Dawson, Phillip B.

doi:10.1016/s0377-0273(00)00188-8

Cited by 30 publications

(17 citation statements)

References 21 publications

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“…Similarly, at Montserrat, LP events occur usually in swarms and occasionally merge into tremor (Neuberg et al 2000). During times of tremor intermittence, swarms of LP events were also observed to merge into sustained tremor (Arciniega et al 2000). Features similar to those seen in tremor at Redoubt and Merapi have also been observed in tremor at Popocatepetl, depending on the eruptive behavior of the volcano.…”

Section: Introductionmentioning

confidence: 82%

“…Figure 2b shows the cumulative numbers of LP events (solid line) and cumulative number of VT events (dotted line) versus time. All the VT activity observed at Popocatepetl originates at depths of 2-10 km beneath the crater (Arciniega et al 2000). Of note is the persistent low activity of VT events contrasting the high rates of LP event production.…”

Section: Datamentioning

confidence: 96%

“…A few events display quasi-monochromatic signatures and another few are characterized by exponentially decaying coda. Spectral peaks below 0.5 Hz represent oceanic microseismic noise (Arciniega et al 1999(Arciniega et al , 2000, and spectral peaks in the 0.5-3.0 Hz band represent the volcanic signal. Using digital broadband data from PPIG available after August 1996, we select LP signals based on the following criteria: (1) the events display the characteristic features of LP signals described above; (2) visual observations indicate that the seismic signals are associated with fumarolic activity and/or more energetic emissions of gas and ash; and (3) the signals have a signal-to-noise ratio of at least 3.…”

Section: Description Of Lp Events and Tremormentioning

confidence: 99%

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Long-period events and tremor at Popocatepetl volcano (1994–2000) and their broadband characteristics

2002

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Following an initial phreatic eruption on 21 December 1994, activity at Popocatepetl has been dominated by fumarolic emissions interspersed with more energetic emissions of ashes and gases. A phase of repetitive dome-building and dome-destroying episodes began in March 1996 and is still ongoing at present. We describe the long-period (LP) seismicity accompanying eruptive activity at Popocatepetl from December 1994 through May 2000, using data from a three-component broadband seismometer located 5 km from the summit crater. The broadband records display a variety of signals, with periods ranging in the band 0.04-90 s. Long-period events and tremor with typical dominant periods in the range 0.3-2.0 s are the most characteristic signals observed at Popocatepetl. These signals appear to reflect volumetric sources driven by pressure fluctuations associated with the unsteady transport of gases beneath the crater. Very-long-period (VLP) signals are also observed in association with LP events and tremor. The VLP signals which accompany LP events display Ricker-like wavelets with periods near 36 s, whereas VLP signals associated with tremor waveforms typically show sustained oscillations at periods ranging up to 90 s. The spectra and particle motion patterns remain similar from event to event for the majority of LP and tremor signals analyzed during the time span of this study, suggesting a repeated, non-destructive activation of a common source. Hypocenters determined by phase pick analyses of selected LP events recorded by the seven-station, permanent Popocatepetl short-period network suggest that the majority of these events are confined to a source region in the top 1.5 km below the crater floor. The repetitive occurrences of VLP signals with closely matched waveform characteristics are consistent with a non-destructive reactivation of at least two sources. One source appears to coincide with the main source region of LP seismicity, whereas the second is a deeper source whose activity appears to be intimately linked with episodes of monochromatic tremor.

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Section: Introductionmentioning

confidence: 82%

Section: Datamentioning

confidence: 96%

Section: Description Of Lp Events and Tremormentioning

confidence: 99%

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Long-period events and tremor at Popocatepetl volcano (1994–2000) and their broadband characteristics

2002

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“…This seismicity consisted in several hundreds of shock-like events (LP events) superposed upon a sustained background noise. Records have been band-pass filtered between 0.5-4 Hz with a 4-pole zero-phase-shift Butterworth filter in order to exclude oceanic microseismic noise, typical of the 0.1-0.5 Hz band [Webb, 1998;Arciniega-Ceballos et al, 2000], while the spectral peaks in the 0.5-4 Hz band are commonly associated with a volcanic origin of the seismic signals [Aki and Koyanagi, 1981;Chouet, 1996].…”

Section: Data Analysesmentioning

confidence: 99%

Low‐frequency seismic signals recorded by OBS at Stromboli volcano (Southern Tyrrhenian Sea)

Sgroi

Montuori

Agrusta

et al. 2009

Geophysical Research Letters

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[1] Five three-component broadband ocean bottom seismometers (OBSs) were deployed on the seafloor around the Aeolian Islands (Southern Tyrrhenian Sea). By comparing OBSs digital seismograms, we found a lowfrequency seismicity recorded only at OBS05, the nearest seafloor station to Stromboli volcano. This seismicity appears in the form of a continuous seismic signal (tremor-like-signal) as well as a considerable number of shock-like events. We focused on recordings from OBS05 to verify their correlation with Stromboli volcanic activity. From the spectral analysis, we observed low-frequency events (LP events), superposed upon the continuous background noise (tremor). LP events and tremor, showing similar energy fluctuations and frequency content, appear to be produced by the same dynamic processes. We interpret this low-frequency seismicity as probably originating from a continuous uprising of gas bubbles from the deeper part of the Stromboli magmatic column. This could highlight the existence of a deeper source for low-frequency seismicity. Citation: Sgroi, T., C. Montuori, R. Agrusta, and P. Favali (2009), Low-frequency seismic signals recorded by OBS at Stromboli volcano (Southern

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“…Broadband seismic observations carried out at many volcanoes (KAWAKATSU et al, 1992(KAWAKATSU et al, , 1994NEUBERG et al, 1994;KANESHIMA et al, 1996;OHMINATO and EREDITATO, 1997;OHMINATO et al, 1998;DAWSON et al, 1998;ROWE et al, 1998;CHOUET et al, 1999;ARCINIEGA et al, 1999;FUJITA et al, 2000;LEGRAND et al, 2000;NISHIMURA et al, 2000) clearly demonstrate the broadband nature of volcanic activity and undescore the usefulness of such measurements in the quantification of source mechanisms and mass transport phenomena associated with eruptive activity.…”

Section: Magma Pathway Geometry and Magma Volumetric Budget Derived Fmentioning

confidence: 99%

Volcano Seismology

Chouet¹

2003

Pure appl. geophys.

259

178

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A fundamental goal of volcano seismology is to understand active magmatic systems, to characterize the configuration of such systems, and to determine the extent and evolution of source regions of magmatic energy. Such understanding is critical to our assessment of eruptive behavior and its hazardous impacts. With the emergence of portable broadband seismic instrumentation, availability of digital networks with wide dynamic range, and development of new powerful analysis techniques, rapid progress is being made toward a synthesis of high-quality seismic data to develop a coherent model of eruption mechanics. Examples of recent advances are: (1) high-resolution tomography to image subsurface volcanic structures at scales of a few hundred meters; (2) use of small-aperture seismic antennas to map the spatio-temporal properties of long-period (LP) seismicity; (3) moment tensor inversions of verylong-period (VLP) data to derive the source geometry and mass-transport budget of magmatic fluids; (4) spectral analyses of LP events to determine the acoustic properties of magmatic and associated hydrothermal fluids; and (5) experimental modeling of the source dynamics of volcanic tremor. These promising advances provide new insights into the mechanical properties of volcanic fluids and subvolcanic mass-transport dynamics. As new seismic methods refine our understanding of seismic sources, and geochemical methods better constrain mass balance and magma behavior, we face new challenges in elucidating the physico-chemical processes that cause volcanic unrest and its seismic and gas-discharge manifestations. Much work remains to be done toward a synthesis of seismological, geochemical, and petrological observations into an integrated model of volcanic behavior. Future important goals must include: (1) interpreting the key types of magma movement, degassing and boiling events that produce characteristic seismic phenomena; (2) characterizing multiphase fluids in subvolcanic regimes and determining their physical and chemical properties; and (3) quantitatively understanding multiphase fluid flow behavior under dynamic volcanic conditions. To realize these goals, not only must we learn how to translate seismic observations into quantitative information about fluid dynamics, but we also must determine the underlying physics that governs vesiculation, fragmentation, and the collapse of bubble-rich suspensions to form separate melt and vapor. Refined understanding of such processes-essential for quantitative short-term eruption forecasts-will require multidisciplinary research involving detailed field measurements, laboratory experiments, and numerical modeling.

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Temporal and spectral characteristics of seismicity observed at Popocatepetl volcano, central Mexico

Cited by 30 publications

References 21 publications

Long-period events and tremor at Popocatepetl volcano (1994–2000) and their broadband characteristics

Long-period events and tremor at Popocatepetl volcano (1994–2000) and their broadband characteristics

Low‐frequency seismic signals recorded by OBS at Stromboli volcano (Southern Tyrrhenian Sea)

Volcano Seismology

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