One of the greatest remaining problems in modern volcanology is the process by which volcanic eruptions are triggered. It is generally accepted that eruptions are preceded by magma intrusion [Sigurdsson and Sparks, 1978]. The degree of interaction between previously ponded magma in a chamber and ...
At that time the prime resource for global seismic data were microfilm chips containing waveform data from the World Wide Seismographic Network (WWSSN) (Oliver & Murphy,1971; Peterson & Hutt,2014) stored at a very limited number of archives around the country. Users would travel to the archive...
A primary goal of volcanology is forecasting hazardous eruptive activity. Despite much progress over the last century, however, volcanoes still erupt with no detected precursors, lives and livelihoods are lost to eruptive activity, and forecasting the onsets of eruptions remains fraught with uncertainty...
VOLCANOLOGY8439 Physics and chemistry of magma bodiesVOLCANOLOGYThe calculated residual topography (RT) and residual mantle Bouguer anomaly (RMBA) reveal distinctive asymmetric crustal structure on conjugate flanks of the Mohns Ridge during the last 35 Ma. During Period I (35 Ma to 17 Ma), large ...
fine ash/ A9140 Volcanology A9190 Other topics in solid Earth physicsGranular flows were generated by the release of beds of particles in various fluidized states, which then deaerated in a horizontal channel. We describe characteristics of the flows and their deposits. Morphological similarities ...
Four lithofacies are proposed, based on the size and shape of clasts and inferred degree of welding: (1) ashrich deposits; (2) nonflattened scoria deposits; (3) mixed scoria deposits; and (4) densely welded scoria deposits. Spatial relationships between lithofacies, steep primary dips, and ...
Bulletin of VolcanologyJohnson RW, Arculus RJ (1978) Volcanic rocks of the Witu islands, Papua New Guinea: the origin of magmas above the deepest part of the New Britain Benioff zone. Bull Volcanol 41:609–655Johnson, R. W. & Arculus, R. J. (1978). Volcanic rocks of the Witu ...
volcanology/ hot spot volcanismpattern recognitionvolcanogeoid anomalieshot spotsterrestrial heatspatial distributiontectonicsThe aim of this paper is to identify the characteristic features, in terms of geophysically measured parameters, of the hot spot sites over the Earth's surface. We use a pattern ...
8450] VOLCANOLOGY / Planetary volcanismThe degree of chemical equilibration (hereafter as Ke), defined as the cumulative mass fraction of the metalic core in equilibrium with the silicate mantle during the Earth accretion processes, greatly influences determination of the timing of the Earth core ...
volcanology/ tholeiitic-alkalic transitionvolcanic geologysubglacial volcanoAsh MountainSouth TuyaTuya ButteBritish ColumbiaCanadabasaltic volcanoAsh Mountain, South Tuya, and Tuya Butte are three small basaltic volcanoes in the Stikine volcanic belt of northern British Columbia. The volcanoes rise 700, 500...