Brilliantly colored sunrises and sunsets
The Richter scale measures earthquakes, not volcanic eruptions. Eruptions are rated on the Volcanic Explosive Index. On this scale, the 1991 eruption of Mount Pinatubo was a VEI 6.
The kinds of eruptions are the quiet eruptions and the explosive eruptions.
Non-explosive and Explosive
There are effusive eruptions and explosive eruptions.
Volcanic explosive index is a measure of how explosive a volcanic eruption is based largely on the amount of material released. It ranges from VEI-0 for non explosive eruptions to VEI-8 for massive super eruptions.
No. Volcanic eruptions in Hawaii are not usually explosive.
Flow, and explosive
explosive, produces lahars and volcanic ash clouds.
Mount Pinatubo had LATERAL eruption. It means, generally volcano erupts at its highest peak where its vent finds an opening, but mount Pinatubo got a weak side and therefore it erupted laterally.
Pahoehoe is one substance usually not present in explosive volcanic eruptions. Tephra, lava and other gasses are typically present during an eruption.
Rhyolite is associated with explosive eruptions.
Two types of volcanic eruptions are explosive eruptions, characterized by the violent ejection of lava, ash, and gases, and effusive eruptions, which involve the slow release of lava flows. Explosive eruptions are typically more destructive and can create volcanic ash clouds that pose hazards to aviation and human health. Effusive eruptions, on the other hand, can lead to the formation of lava plateaus and shield volcanoes.