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Science 3rd qtr
Science 3rd qtr1
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mt. pinatubo
- one of the composite volcanoes that constitute the Luzon volcanic arc.
June 15 1991
- date pinatubo erupted
Philippine Institute of Volcanology and seismology-
PHIVOLCS
19 eruptions-
many times that pinatubo erupted
Zambales
,
Pampanga
,
Tarlac
- provinces that Pinatubo blanketed.
Viscosity
- resistance to flow of a lava determines how easily gas escapes in the atmosphere
Silicic
Rocks - rocks that mainly composed of silica (700C)
Mafic rocks-
deficient rocks that containing silica at 50% lower
Explosive
and
effusive
-two types of eruptions
explosive eruptions
- characterized by gas driven explosion that propels magma and tephra
effusive eruptions
- eruption which featre the outpouring lava withouy significant explosive eruption.
Magmatic
,
Phreatomagmatic
,
phreatic eruptions
- 3 volcanic eruption according to metatype
Hawaiian
- eruption named after the Kilauea Volcano.
Hawaiian
- is the calmnest eruption types
Strombolian-
eruption driven by the bursting of gas bubbles within the magma.
Vulcanian
- eruption named after the Italian Island Volcano
Hephaestus
- vulcan of Romans
Vulcanian
- explosive eruption that occurs when the pressure of entrapped gases in a relatively viscous magma.
Pelean
- also called as nuee ardante eruption
Peelean
- eruption when a large quantity of gas, dust, ash, and lava fragments are blown out.
Plinian
- most powerful and explosive eruption
Surtseyan
- eruption named after the islanf of surtseyan off the coast of Iceland.
surtseyan
- hydro magmatic eruption where magma interacts exposively with water.
submarine
- type of an eruption that takes place beneath the surface of the water
Sublacial
eruption - also known as glaciovolcanism which features the interaction between lava and ice often under a glacier.
Phreatic
eruptions - (steam blast eruption) are those driven by explosive steam resulting from cold ground.
Magnitude
- energy released by an earthquake
Ritcher
Scale - use to measure magnitude
Intensity
- the effect of an earthquake
mercalli
intensity scale - use to measure intensity
volcanic
process - refers to the eruptive and non eruptive activities that take place on a volcano.
Pahoehoe
lava - is a relatively smooth lava flow that cools down forming typical smooth billowy/ ropey surface.
A'a
Lava - which is characterized by fragmented, rough, sometimes spiny or blocky surface.
Clarence Edward Dutton
- introduced the Pahoehoe Lava and A'a lava
Pyroclastic surge
- ground nugging radial cloud that develop along with the eruption column