Development of the 1990 Kalapana Flow Field, Kilauea Volcano, Hawaii
- 179 Downloads
The 1990 Kalapana flow field is a complex patchwork of tube-fed pahoehoe flows erupted from the Kupaianaha vent at a low effusion rate (approximately 3.5 m3/s). These flows accumulated over an 11-month period on the coastal plain of Kilauea Volcano, where the pre-eruption slope angle was less than 2°. the composite field thickened by the addition of new flows to its surface, as well as by inflation of these flows and flows emplaced earlier. Two major flow types were identified during the development of the flow field: large primary flows and smaller breakouts that extruded from inflated primary flows. Primary flows advanced more quickly and covered new land at a much higher rate than breakouts. The cumulative area covered by breakouts exceeded that of primary flows, although breakouts frequently covered areas already buried by recent flows. Lava tubes established within primary flows were longer-lived than those formed within breakouts and were often reoccupied by lava after a brief hiatus in supply; tubes within breakouts were never reoccupied once the supply was interrupted. During intervals of steady supply from the vent, the daily areal coverage by lava in Kalapana was constant, whereas the forward advance of the flows was sporadic. This implies that planimetric area, rather than flow length, provides the best indicator of effusion rate for pahoehoe flow fields that form on lowangle slopes.
Key wordsLava flow Pahoehoe Kilauea Kupaianaha inflation lava tubes east rift zone
Unable to display preview. Download preview PDF.
- Heliker CC, Wright TL (1991) The Pu'u 'O'o-Kupaianaha eruption of Kilauea. Eos 47:521, 526, 530Google Scholar
- Hon K, Kauahikaua J, Denlinger R, McKay K (in press) Emplacement and inflation of pahoehoe sheet flows-Observations and measurements of active Hawaiian lava flows. GSA BullGoogle Scholar
- Kauahikaua J, Moulds TN, Hon K (1990) Observations of lava tube formation in Kalapana, Hawai'i. Eos 71:1711Google Scholar
- Malin MC (1980) Lengths of Hawaiian lava flows. Geology 8:306–308Google Scholar
- Moulds TN, Heliker C, Hon K, Kauahikaua J, Wright T, Bussard W (1990) Kilauea eruption update. Eos 71:1694Google Scholar
- Okubo P, Tomori A, Nakata J, Largo A, Fukunaga P (1990) Spatial and temporal patterns of seismicity related to the on-going eruption of Kilauea Volcano, Hawaii. Eos 71:1711Google Scholar
- Pieri DC, Baloga SM (1986) Eruption rate, area, and length relationships for some Hawaiian lava flows. J Volcanol Geotherm Res 30:29–45Google Scholar
- Ulrich GE, Wolfe EW, Heliker CC, Neal CA (1987) Pu'u 'O'o IV: evolution of a plumbing system. In: Univ of Hawaii, Hawaii Inst of Geophys, Proc Hawaii Symposium on How Volcanoes Work:259Google Scholar
- Walker GPL (1973) Lengths of lava flows. In: Guest JE, Skelhorn RR (eds) Mount Etna and the 1971 eruption. Phil Trans R Soc London 274:107–118Google Scholar
- Wolfe EW (ed) (1988) The Puu Oo eruption of Kilauea Volcano, Hawaii: episodes 1 through 20, January 3, 1983 through June 8, 1984. US Geol Surv Prof Pap 1463:251 ppGoogle Scholar