Report on Kilauea (United States) — 15 January-21 January 2014
Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 15 January-21 January 2014
Managing Editor: Sally Sennert.
Please cite this report as:
Global Volcanism Program, 2014. Report on Kilauea (United States) (Sennert, S, ed.). Weekly Volcanic Activity Report, 15 January-21 January 2014. Smithsonian Institution and US Geological Survey.
19.421°N, 155.287°W; summit elev. 1222 m
All times are local (unless otherwise noted)
During 15-21 January 2014 HVO reported that the circulating lava lake occasionally rose and fell in the deep pit within Kilauea's Halema'uma'u Crater. A "deflation-inflation" event, or DI, began on 17 January and by 21 January the lava-lake level had dropped more than 20 m to about 70 m below the crater floor. The plume from the vent continued to deposit variable amounts of ash, spatter, and Pele's hair onto nearby areas. At Pu'u 'O'o Crater, glow emanated from spatter cones on the N and S portions of the crater floor. The 7.5-km-long Kahauale’a 2 lava flow (based on a satellite image from 17 January), fed by the NE spatter cone, was active with scattered break-out flows and burned the forest N of Pu'u 'O'o. On 19 January the N side of the NE spatter cone collapsed, possibly due to lower lava levels as a result of the DI event, exposing a small lava pond.
Geological Summary. Kilauea overlaps the E flank of the massive Mauna Loa shield volcano in the island of Hawaii. Eruptions are prominent in Polynesian legends; written documentation since 1820 records frequent summit and flank lava flow eruptions interspersed with periods of long-term lava lake activity at Halemaumau crater in the summit caldera until 1924. The 3 x 5 km caldera was formed in several stages about 1,500 years ago and during the 18th century; eruptions have also originated from the lengthy East and Southwest rift zones, which extend to the ocean in both directions. About 90% of the surface of the basaltic shield volcano is formed of lava flows less than about 1,100 years old; 70% of the surface is younger than 600 years. The long-term eruption from the East rift zone between 1983 and 2018 produced lava flows covering more than 100 km2, destroyed hundreds of houses, and added new coastline.