Community By Hawaiian Volcano Observatory | Sunday, March 3, 2019, 12:05 a.m. Share this story A. LERNER/U.S. Geological Survey photo This ‘a‘a flow that erupted June 1, 2018, from fissure 8 on Kilauea Volcano’s lower East Rift Zone shows how the interior of a lava flow remains incandescently hot even though surface cooling forms a crust of solid rubble. Based on studies of lava flow cooling rates, it will take more than 130 days for a flow this thick (about 4.5 m, or 15 ft) to cool to a temperature of about 200 degrees Celsius (290 degrees Fahrenheit). Since the end of the 2018 lower East Rift Zone eruption on Kilauea Volcano, questions surfaced concerning how long it will take for the new lava flows to solidify. This is a difficult question to answer because the initial eruptive temperatures — along with many different factors — can influence the rate of cooling. Eruptive lava temperatures of the 2018 LERZ eruption reached a … [Read more...] about How do lava flows cool and how long does it take?
Hawaii lava flow map
Volcano Watch: How are lava-flow maps made during an eruption?
Community By Hawaiian Volcano Observatory | Sunday, November 4, 2018, 12:05 a.m. Share this story This map of Kilauea Volcano’s lower East Rift Zone, created by USGS Geographic Information Systems analysts, shows the extent of the 2018 lava flows (pink), which covered an area of about 35.5 sq km (13.7 sq mi) and added about 875 acres of new land to East Hawaii. There has been no lava flow expansion since August 9, 2018. Minor activity within the fissure 8 cone continued into early September 2018 but did not expand the flow margins. Shaded purple areas depict lava flows erupted in 1840, 1955, 1960, and 2014-2015. (USGS map) Bright red polygon features were drawn by USGS Geographic Information Systems analysts around new or active lower East Rift Zone lava flows, which appear lighter in color due to their high temperature on this thermal map. Collected during a helicopter overflight on May 9, 2018, this map shows fissures 6 (left) and 15 (right) with Pohoiki … [Read more...] about Volcano Watch: How are lava-flow maps made during an eruption?
Stop subsidizing building in flood — and even lava flow — zones
By Adam B. Summers | [email protected] | PUBLISHED: September 26, 2018 at 9:01 am | UPDATED: September 26, 2018 at 9:02 am It has been more than a week since Hurricane Florence made landfall in North Carolina, and flood waters are continuing to wreak havoc across the Carolinas and Virginia. While much of the destruction caused by the powerful storm was unavoidable, some of it was, and government interventions have only served to exacerbate such tragedies. The hurricane is responsible for at least 42 deaths. Tens of thousands are still without power and flood waters that could take weeks to recede. New evacuation orders are still being made in South Carolina due to flooding. Early estimates put property damage at around $20 billion, perhaps higher, and probably billions more in agricultural damage to crops and livestock. While most storms are thankfully nowhere near as harmful as Florence, hurricanes hitting the Atlantic and Gulf coasts is somewhat of a regular occurrence (hence, … [Read more...] about Stop subsidizing building in flood — and even lava flow — zones
Lava flow from Hawaii’s Kilauea volcano slows dramatically
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Lava flow from fissure 8 may go on for months or years
COURTESY USGS A Hawaiian Volcano Observatory geologist stood Thursday on airborne lava fragments, such as Pele’s hair, that erupted from and deposited downwind of the fissure 8 vent. He was there to observe vent activity and to capture both thermal and video imagery of the pulsations occurring in the near-vent channel.COURTESY USGS Fissure 8 remains the main exit point of magma from Kilauea and could continue for months to years. The Kilauea eruption — which began May 3 and has destroyed more than 700 homes — “most likely” could continue for months to years. That’s the conclusion of a recent U.S. Geological Survey report prepared for Hawaii County Civil Defense. The authors said the sustained flow of magma from the summit so far leads them to believe it will be some time before the eruption ends. The range of duration is broad and remains unpredictable, scientists said Monday afternoon during a phone conference. The document, posted … [Read more...] about Lava flow from fissure 8 may go on for months or years