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- Effusive_eruption abstract "An effusive eruption is a type of volcanic eruption in which lava steadily flows out of a volcano onto the ground. Effusive eruption differs from explosive eruption, wherein magma is violently fragmented when expelled from a volcano. The shape of the lava flows created by effusive eruptions is governed by the type of lava, rate and duration of eruption, and slope of the surrounding areas.A volcanic eruption is effusive when low-viscosity magma, usually basaltic in composition, is released from the Earth's crust. In an effusive eruption, gas escaped the magma as it erupts and forms lava that flows downhill continuously. This type of lava flow can build shield volcanoes, which are numerous in Hawaii.Eruptions of basaltic magma often transition between effusive and explosive eruption patterns. The behavior of these eruptions is largely dependent on the permeability of the magma and the magma ascent rate. For an effusive eruption to occur, magma must be permeable enough to allow the expulsion of gas bubbles contained within it. If the magma is not above a certain permeability threshold, it cannot degas and will erupt explosively. Additionally, at a certain threshold, fragmentation within the magma can cause an explosive eruption. This threshold is governed by the Reynolds Number, a dimensionless number in fluid dynamics that is directly proportional to fluid velocity. Eruptions will be effusive if the magma has a low ascent velocity. At higher magma ascent rates, the fragmentation within the magma passes a threshold and results in explosive eruptions. Silicic magma also exhibits this transition between effusive and explosive eruptions, but the fragmentation mechanism differs. The 1912 Novarupta eruption and the 2003 Stromboli eruption both exhibited a transition between explosive and effusive eruption patterns.Effusive basalt lava flows cool to either of two forms, ʻaʻā or pāhoehoe. Andesite lava typically forms blocky lava flows. Dacite lava flows often form steep-sided mounds, called lava domes, due to their greater viscosity.".
- Effusive_eruption thumbnail Aa_channel_flow_from_Mauna_Loa.jpg?width=300.
- Effusive_eruption wikiPageID "3034087".
- Effusive_eruption wikiPageLength "4794".
- Effusive_eruption wikiPageOutDegree "25".
- Effusive_eruption wikiPageRevisionID "692373740".
- Effusive_eruption wikiPageWikiLink Andesite.
- Effusive_eruption wikiPageWikiLink Basalt.
- Effusive_eruption wikiPageWikiLink Category:Articles_containing_video_clips.
- Effusive_eruption wikiPageWikiLink Category:Volcanic_eruption_types.
- Effusive_eruption wikiPageWikiLink Dacite.
- Effusive_eruption wikiPageWikiLink Explosive_eruption.
- Effusive_eruption wikiPageWikiLink Fluid_dynamics.
- Effusive_eruption wikiPageWikiLink Hawaii.
- Effusive_eruption wikiPageWikiLink Lava.
- Effusive_eruption wikiPageWikiLink Lava_dome.
- Effusive_eruption wikiPageWikiLink Magma.
- Effusive_eruption wikiPageWikiLink Novarupta.
- Effusive_eruption wikiPageWikiLink Reynolds_number.
- Effusive_eruption wikiPageWikiLink Shield_volcano.
- Effusive_eruption wikiPageWikiLink Silicic.
- Effusive_eruption wikiPageWikiLink Stromboli.
- Effusive_eruption wikiPageWikiLink Types_of_volcanic_eruptions.
- Effusive_eruption wikiPageWikiLink Velocity.
- Effusive_eruption wikiPageWikiLink Viscosity.
- Effusive_eruption wikiPageWikiLink File:Aa_channel_flow_from_Mauna_Loa.jpg.
- Effusive_eruption wikiPageWikiLink File:Kilauea_-_Puu_Oo_-_MLK_lava_fountain_video_-_9-10_February_2005.ogv.
- Effusive_eruption wikiPageWikiLinkText "Effusive eruption".
- Effusive_eruption wikiPageWikiLinkText "Effusive".
- Effusive_eruption wikiPageWikiLinkText "effusion".
- Effusive_eruption wikiPageWikiLinkText "effusions".
- Effusive_eruption wikiPageWikiLinkText "effusive activity".
- Effusive_eruption wikiPageWikiLinkText "effusive eruption".
- Effusive_eruption wikiPageWikiLinkText "effusive volcanic".
- Effusive_eruption wikiPageWikiLinkText "effusive volcanism".
- Effusive_eruption wikiPageWikiLinkText "effusive".
- Effusive_eruption wikiPageWikiLinkText "lava effusion".
- Effusive_eruption wikiPageWikiLinkText "lava effusions".
- Effusive_eruption wikiPageWikiLinkText "lava eruptions".
- Effusive_eruption wikiPageWikiLinkText "non-explosive".
- Effusive_eruption wikiPageWikiLinkText "passive lava eruptions".
- Effusive_eruption wikiPageWikiLinkText "passive lava flows".
- Effusive_eruption wikiPageUsesTemplate Template:Okina.
- Effusive_eruption wikiPageUsesTemplate Template:Reflist.
- Effusive_eruption wikiPageUsesTemplate Template:Types_of_volcanic_eruptions.
- Effusive_eruption wikiPageUsesTemplate Template:Volcanology-stub.
- Effusive_eruption subject Category:Articles_containing_video_clips.
- Effusive_eruption subject Category:Volcanic_eruption_types.
- Effusive_eruption hypernym Eruption.
- Effusive_eruption type Disease.
- Effusive_eruption type Type.
- Effusive_eruption type Type.
- Effusive_eruption comment "An effusive eruption is a type of volcanic eruption in which lava steadily flows out of a volcano onto the ground. Effusive eruption differs from explosive eruption, wherein magma is violently fragmented when expelled from a volcano.".
- Effusive_eruption label "Effusive eruption".
- Effusive_eruption sameAs Q1296340.
- Effusive_eruption sameAs انبثاق_بركاني.
- Effusive_eruption sameAs Erupció_efusiva.
- Effusive_eruption sameAs Výlevný_vulkanismus.
- Effusive_eruption sameAs Effusion_(Vulkanismus).
- Effusive_eruption sameAs Éruption_effusive.
- Effusive_eruption sameAs Flæðigos.
- Effusive_eruption sameAs Eruzione_effusiva.
- Effusive_eruption sameAs ეფუზია.
- Effusive_eruption sameAs Эффузив.
- Effusive_eruption sameAs Efuzja_(geologia).
- Effusive_eruption sameAs m.08m1zc.
- Effusive_eruption sameAs Эффузия_(геология).
- Effusive_eruption sameAs Ефузія_(геологія).
- Effusive_eruption sameAs Effuziya.
- Effusive_eruption sameAs Q1296340.
- Effusive_eruption wasDerivedFrom Effusive_eruption?oldid=692373740.
- Effusive_eruption depiction Aa_channel_flow_from_Mauna_Loa.jpg.
- Effusive_eruption isPrimaryTopicOf Effusive_eruption.