Resultado de búsqueda
A dispersal index of 50,000 square kilometres (19,000 sq mi) has been proposed as a cutoff for an ultra-Plinian eruption. [7] In the criteria of Volcanic Explosivity Index, recognizing an eruption as ultra-Plinian would make it at least VEI-5 or higher.
Within these broad eruptive types are several subtypes. The weakest are Hawaiian and submarine, then Strombolian, followed by Vulcanian and Surtseyan. The stronger eruptive types are Pelean eruptions, followed by Plinian eruptions; the strongest eruptions are called Ultra-Plinian.
14 de abr. de 2023 · Ultra-Plinian eruptions are the largest of all volcanic eruptions, and are so voluminous that large calderas form above vacated magma chambers. These eruptions are more intense and have a higher eruption rate than Plinian ones and form higher eruption columns.
Sub-Plinian, Plinian, and ultra-Plinian eruptions have the same eruptive style but increased energy, resulting in a continuum of increasingly high D and F, as well as eruptive column height (Cas and Wright, 1988 ), with boundaries being conventionally drawn at plume column heights of 30 km (sub-Plinian to Plinian) and 55 km (Plinian to ...
17 de feb. de 2016 · 45 Citations. 95 Altmetric. Metrics. Abstract. The 39 ka Campanian Ignimbrite (CI) super-eruption was the largest volcanic eruption of the past 200 ka in Europe. Tephra deposits indicate two...
- Alejandro Marti, Arnau Folch, Antonio Costa, Samantha Engwell
- 2016
Plinian (or Vesuvian) eruptions typify the well-known historic eruptions that produce powerful convecting plumes of ash ascending up to 45 kilometers into the stratosphere.
USGS photo. Plinian and Sub-Plinian eruptions differ primarily on the basis of intensity, although Plinian events may consist of more silicic magmas than Sub-Plinian ones. Plinian eruptions are extremely explosive eruptions, producing ash columns that extend many tens of miles into the stratosphere and that spread out into an umbrella shape.
