Hawaii’s Big Island faced a dramatic volcanic display Tuesday as Kilauea unleashed towering lava fountains that scattered hazardous tephra across key areas.
A Fiery Spectacle Turns Hazardous
A Fiery Spectacle Turns Hazardous (Image Credits: Imgs.mongabay.com)
Lava fountains from Kilauea’s summit vents rocketed more than 1,000 feet into the air during Episode 43 of the ongoing Halemaʻumaʻu eruption. Observers noted north and south vents surging to peaks of at least 1,300 feet shortly after 11 a.m. HST, with the south vent often towering higher. The episode kicked off at 9:17 a.m. HST following precursory activity and lasted over nine hours until 6:21 p.m. HST.
Effusion rates hit a maximum of 1,000 cubic yards per second around 10:30 a.m., fueling plumes that climbed beyond 30,000 feet above sea level. Light southwest winds carried the material northeast, blanketing nearby sites. This burst ranked among the larger recent episodes, comparable to numbers 41 and 42. While mesmerizing, the event shifted focus to public safety as glassy fragments rained down.
Tephra Blankets Nearby Areas
Volcanic tephra, including ash, pumice, and larger chunks, piled up significantly around the summit caldera’s north rim. The Volcano Golf Course endured the heaviest fallout, with accumulations up to 6 inches and pieces several inches across. Uēkahuna overlook saw 4 to 7 inches settle, starting around 10:20 a.m. HST.
Farther afield, lighter deposits reached Volcano Village, Mauna Loa Estates, and even Royal Hawaiian Estates about 6 miles northeast. Fine ash and Pele’s hair drifted to Mountain View, Hilo, Hawaiian Paradise Park, and the Hamakua Coast. These particles posed risks of irritation to eyes, skin, and lungs, while potentially clogging water catchment systems prevalent on the island. Officials warned of remobilization by winds in the aftermath.
Closures and Coordinated Response
Hawaiʻi Volcanoes National Park shut down western overlooks around 11:20 a.m. HST and evacuated visitors before closing the summit area entirely. Highway 11, a vital route circling the island, faced partial closure on both sides of the park starting about 11:10 a.m. HST due to the debris hazard. The U.S. Geological Survey elevated the volcano alert to WARNING and aviation code to RED at 10:54 a.m. HST before downgrading later.
Hawaii County Civil Defense opened a shelter at a local gymnasium for those affected by road blocks or tephra, though spokesperson Tom Callis reported no immediate use. The National Weather Service issued an ashfall warning at 11:29 a.m. HST. Past episodes required civil defense teams to clear heavy ash from homes, underscoring the recurring challenge. All lava remained confined within Halemaʻumaʻu crater, sparing structures.
Part of a Persistent Eruption Cycle
Kilauea has produced 43 episodic fountaining events since the Halemaʻumaʻu eruption began December 23, 2024. Tuesday’s output added roughly 16 million cubic yards of lava, covering half the crater floor and contributing to a total nearing 325 million cubic yards since late 2024. The volcano’s summit registered 33.7 microradians of deflationary tilt during the event.
- Most episodes last a day or less, though durations vary from hours to days.
- Lava flows stayed within the caldera and crater, avoiding broader threats.
- Caldera rim hazards like rockfalls and instability persist, with public access banned since 2007.
- Vog from gases like SO₂ affects downwind areas, prompting health cautions.
Monitoring Continues Amid Pause
The eruption paused after Episode 43 ended, with alert levels now at WATCH/ORANGE as of March 11. USGS scientists track via webcams, tiltmeters, and gas sensors, issuing updates through observatory messages. Residents report tephra falls to aid mapping.
Authorities emphasize minimizing exposure to fallout and vog. Kilauea remains one of Earth’s most active volcanoes, blending awe with vigilance for island communities.
Key Takeaways
- Lava fountains peaked at 1,300 feet, ejecting tephra up to 6 inches thick near the summit.
- Closures protected visitors and drivers; no structural damage reported.
- Episode 43 highlights the eruption’s episodic nature since December 2024.
Kilauea’s latest show reminds Big Island residents of nature’s power and the importance of preparedness. What are your thoughts on living near such an active volcano? Share in the comments.
