Volcanic Seismology and Accompanying Activity of Ruapehu Volcano, New Zealand

Dibble, R. R.

doi:10.1016/b978-0-444-41141-9.50009-7

Cited by 35 publications

(34 citation statements)

References 12 publications

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“…For example, Minakami (1960Minakami ( , 1972 calls the phase of increase in the daily frequency of B-type events the pre-volcanic or pre-eruptive stage. Dibble (1972) reported a sharp increase in the release of seismic power approximately 29 min before an explosive eruption of Ruapehu volcano on 22 June 1969. Some researchers noticed that in certain cases, the precursory activity increased in a hyperbolic way.…”

Section: Empirical Forecastingmentioning

confidence: 97%

A model to describe precursory material-failure phenomena: applications to short-term forecasting at colima volcano, Mexico

Cruz‐Reyna

Reyes‐Dávila

2001

Bull Volcanol

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Some volcanoes exhibit at times accelerating strain and seismicity before eruptions. Different authors have used this behavior to predict eruptions and to develop materials-science models. Here, a linear KelvinVoigt viscoelastic model is proposed to describe the observed behavior. This model also has applications to other failure phenomena, such as landslides. The strain rate of a variety of materials under constant stress after an instantaneous elastic response is found to be well described by a general relaxation law:, where B and s are parameters depending on the material and its creep state. Whether the creep regime is primary or tertiary depends upon the sign of s; s=0 corresponds to pseudoviscous flow. The creep behavior of the viscoelastic body is analyzed for different load histories. It is found that the body has an exponential distribution of retardation frequencies that may or may not converge, depending on the sign of s. According to the model, tertiary creep implies material degradation and a critical weakening of the medium leading to a runaway growth of the strain and seismic energy release rates. If tertiary creep is detected, time of failure predictions may be done from field data through determination of two model parameters for varying loads. The model response compare well with reported examples of pre-eruptive volcano behavior, and with reported results of landslide experiments. The model is tested with the July 1994 (in hindsight) and November 1998 (in foresight) Colima volcano eruptions. Although this method provides some guidance in estimating the time over which accelerating volcanic precursors may end in an eruption, it is emphasized that eruptions may fail to occur at the estimated time, or may not occur at all. On the other hand, eruptions may not be preceded by such a behavior.

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Section: Empirical Forecastingmentioning

confidence: 97%

A model to describe precursory material-failure phenomena: applications to short-term forecasting at colima volcano, Mexico

Cruz‐Reyna

Reyes‐Dávila

2001

Bull Volcanol

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“…Ruapehu in 1980 and 1995 and the lake conditions have been monitored for decades (i.e. Dibble 1974;Christenson 1994;Sherburn et al 1998;Branan 2008), making it suitable for comparison to models with SAGE. The computational domain (Fig.…”

Section: Applicationmentioning

confidence: 99%

Numerical model of crater lake eruptions

et al. 2010

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We present results from a numerical investigation of subaqueous eruptions involving superheated steam released through a lake mimicking the volcanic setting at Mt. Ruapehu. The simulations were conducted using an adaptive mesh, multi-material, hydrodynamics code with thermal conduction SAGE, (Simple Adaptive Grid Eulerian). Parameters investigated include eruption pressure, lake level and mass of superheated vapor. The simulations produced a spectrum of eruption styles from vapor cavities to radial jets that resulted in hazards that ranged from small-scale waves to high amplitude surges that reached and cascaded over the edge of the crater rim. There was an overall tendency for lake surface activity to increase (including wave amplitude) with increasing mass of superheated vapor and eruption pressure. Surface waves were induced by the formation and collapse of a gas cavity. The collapse of the cavity is considered to play a major role in the characteristic features observed during a subaqueous eruption. The additional mass of superheated vapor produced a larger cavity that displaced a larger area of the lake surface resulting in fast moving surges upon the collapse of the cavity. High lake levels (>90 m) appear to suppress the development of explosive jetting activity when eruption pressures are <10 MPa. At very large eruption pressures (>10 MPa), vertical jets and radial ejections of steam and water can occur in water depths >90 m. Less explosive eruption styles can produce hazardous events such as lahars by the outward movement of surface waves over the crater rim.

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“…Seismic studies at Ruapehu date from the 1940s and have included analyses of the characteristics and source processes of volcanic and volcano-tectonic seismicity and the relationships between seismicity and eruptive activity (Dibble 1974;Latter 1981;Hurst 1992Hurst , 1998. Volcanic earthquakes result from the movement of magmatic fluids (McNutt 1996) and are common at Ruapehu ).…”

Section: Previous Workmentioning

confidence: 99%

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

Bryan

Sherburn

2002

Bull Volcanol

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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.

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Volcanic Seismology and Accompanying Activity of Ruapehu Volcano, New Zealand

Cited by 35 publications

References 12 publications

A model to describe precursory material-failure phenomena: applications to short-term forecasting at colima volcano, Mexico

A model to describe precursory material-failure phenomena: applications to short-term forecasting at colima volcano, Mexico

Numerical model of crater lake eruptions

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

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