Kīlauea eruption episode 49 summary
🌋 Episode 49 lava fountaining began after approximately 5 hours of precursory lava overflows from the north vent that started at 4:10 a.m. HST on the morning of June 14. Several subsequent overflows from the north and south vents followed. Consistent north vent dome fountaining started at 8:14 a.m. HST and then steadily escalated in vigor and height until it transitioned into the start of episode 49 fountaining at 9:36 a.m. HST.
🌋North vent lava fountaining reached a maximum height of about 700 feet (210 meters) by around 10:30 a.m. HST. Over the next several hours the fountain height gradually declined, and it was estimated about 300 feet (90 meters) high about 1 hour before the episode ended after about 7.5 hours at 5:05 p.m. HST on June 14.
🌋The instantaneous effusion rate peaked at about 415 cubic yards (320 cubic meters) per second between 10:30 and 11:00 a.m. HST, with an average effusion rate of 260 cubic yards (200 cubic meters) per second for the entire fountaining episode. An estimated 6.5 million cubic yards (5 million cubic meters) of lava erupted. The Uēkahuna tiltmeter (UWD) recorded about 15.5 microradians of deflationary tilt during episode 49.
💨 The north vent lava fountain fed a plume that reached a maximum height of about 18,000 feet (5,500 meters) above sea level. Winds were out of the northeast for most of the eruption causing the plume to move to the southwest during the most energetic part of the eruption. The plume track largely remained within Hawaiʻi Volcanoes National Park with most tephra fall in the closed area.
⛔️ The USGS kept the Kīlauea alert level/aviation color code at WATCH/ORANGE throughout the episode because fallout was not extensive and did not last very long. After the episode ended, USGS lowered Kīlauea to ADVISORY/YELLOW reflecting that volcanic activity had decreased significantly but continues to be closely monitored for possible renewed increase.
📹 Video clip shows Kīlauea episode 49 lava fountaining on June 14, 2026.
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