Cutaway view of the east rift zone of Kīlauea Volcano, Hawaiʻi. 
<p>This simplified cutaway view (not to scale) of <a href="https://en.wikipedia.org/wiki/Kilauea_Volcano" class="extiw" title="w:Kilauea Volcano">Kilauea Volcano</a> shows the pathway of molten rock during the eruption of <a href="https://en.wikipedia.org/wiki/Pu%E2%80%98u_%E2%80%98%C5%8C%E2%80%98%C5%8D" class="extiw" title="w:Pu‘u ‘Ō‘ō">Pu‘u ‘Ō‘ō</a> located on the east rift zone about 20 km from the <a href="https://en.wikipedia.org/wiki/caldera" class="extiw" title="w:caldera">caldera</a>. Molten rock moves from the <a href="https://en.wikipedia.org/wiki/magma" class="extiw" title="w:magma">magma</a> reservoir beneath the caldera through the east rift zone to Pu‘u ‘Ō‘ō. When molten rock erupts as lava from Pu‘u ‘Ō‘ō, it flows either onto the surface or through a lava-tube system 10-11 km to the sea.
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During episode 54 (January 30, 1997), lava erupted from [Napau Crater about 4 km uprift from Pu‘u ‘Ō‘ō. The rift zone widened about 1.8 m in Napau and 36 cm about 2 km uprift, as magma forced a pathway to the surface. Chemical studies of <a href="https://en.wikipedia.org/wiki/lava" class="extiw" title="w:lava">lava</a> samples from episode 54 indicate that two separate and distinct bodies of magma, stored in the rift zone near Napau Crater for many years, supplied lava for the eruptive activity.
Blanchiment (<a href="//commons.wikimedia.org/wiki/User:Bourrichon" title="User:Bourrichon">Bourrichon</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Bourrichon" title="User talk:Bourrichon"><span class="signature-talk">talk</span></a>)) de <a href="//commons.wikimedia.org/wiki/File:Cutaway_view_east_rift_zone_Kilauea.gif" class="mw-redirect" title="File:Cutaway view east rift zone Kilauea.gif">File:Cutaway view east rift zone Kilauea.gif</a> de J. Johnson
2000
<a rel="nofollow" class="external text" href="https://hvo.wr.usgs.gov/kilauea/erz_xsec.html">USGS HVO</a>