Clinopyroxene megacrysts from Itino-megata volcano, northeastern Japan

Contributions to the Mineral Chemistry of Hawaiian Rocks. V. Composition and Origin of Ultramafic Nodules and Megacrysts in a Rhyodacite from Oahu, Hawaiian Islands

Dunite nodules (Foss) and megacrysts of olivine (Fos3 s4 ) and clinopyroxene (FS13W043En44) are present as rare inclusions in the rhyodacite (~ 66wt %SiO z ) of Kauaopuu Ridge, Oahu, Hawaii. The rhyodacite is interbedded with caldera-filling tholeiitic lavas of the Waianae volcano. Results: (I) Dunite nodules (::;; I cm) consist of xenomorphic-granular olivine and minor chrome spinel and clinop...

Volcano-induced regime shifts in millennial tree-ring chronologies from northeastern North America.

Dated records of ice-cap growth from Arctic Canada recently suggested that a succession of strong volcanic eruptions forced an abrupt onset of the Little Ice Age between A.D. 1275 and 1300 [Miller GH, et al. (2012) Geophys Res Lett 39(2):L02708, 10.1029/2011GL050168]. Although this idea is supported by simulation experiments with general circulation models, additional support from field data ar...

Repetitive fracturing during spine extrusion at Unzen volcano, Japan

Rhythmic seismicity associated with spine extrusion is a well-documented phenomenon at a number of dome-forming volcanic systems. At Unzen volcano, Japan, a 4-year dome-forming eruption concluded with the emplacement of a spine from October 1994 to February 1995, offering a valuable opportunity to further investigate seismogenic processes at dome-forming volcanoes. Using continuous data recorde...

Introduction to an Open Community Infrasound Dataset from the Actively Erupting Sakurajima Volcano, Japan

Predictability of Volcano Eruption: lessons from a basaltic effusive volcano

Volcano eruption forecast remains a challenging and controversial problem despite the fact that data from volcano monitoring significantly increased in quantity and quality during the last decades. This study uses pattern recognition techniques to quantify the predictability of the 15 Piton de la Fournaise (PdlF) eruptions in the 1988-2001 period using increase of the daily seismicity rate as a...