Volcano Watch: Kilauea activity update for March 22, 2019

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Volcano Watch: Kilauea activity update for March 22, 2019

Posted on March 22, 2019. Tags: halemaumau, hvo, kilauea, lava, puu oo, usgs, volcano, volcano watch

The 2018 KÄ«lauea Volcano eruption marked the first time the federal government used Unmanned Aircraft Systems (UAS) to assist in an eruption response in the United States. The UAS were used to survey areas otherwise inaccessible or too hazardous for field crews or manned aircraft, collect multiple types of data, and provide 24/7 real-time situational awareness at KÄ«lauea Volcanoâ€™s summit and lower East Rift Zone. This video includes UAS footage from missions flown on May 21, May 27, June 8, June 13, November 7, and November 8, 2018.

Thermal camera time-lapse movie at Mile Marker 14.5 on Pahoa-Kalapana Road (Route 130) March 14-22, 2019. Images courtesy HDOT

This video was taken during a recent overflight of the Puâ€˜u â€˜ÅŒâ€˜Å crater on KÄ«lauea Volcano’s middle East Rift Zone. No major changes were observed at the crater, but its shape continues to be altered by small rockfalls within it. Video taken Monday, March 18, 2019 courtesy of U.S. Geological Survey

This 3D model of the Puâ€˜u â€˜ÅŒâ€˜Å crater was constructed from thermal images taken during a recent helicopter overflight. White areas show warm spots in the crater. Despite the absence of active lava in Puâ€˜u â€˜ÅŒâ€˜Å, changes at the crater have continued since magma drained from beneath it on April 30, 2018. The shape of the crater continues to change through occasional small collapses within it. Images taken Monday, March 18, 2019 courtesy of U.S. Geological Survey

(Activity updates are written by scientists at the U.S. Geological Surveyâ€™s Hawaiian Volcano Observatory.)

KÄ«lauea is not erupting. Rates of seismicity, deformation, and gas release have not changed significantly over the past week.

Two earthquakes with three or more felt reports occurred in HawaiÊ»i during the past week.On March 20 at 2:18 a.m. HST, a magnitude-3.0 earthquake occurred 12 km (7 mi) south of HonokaÊ»a at 31 km (19 mi) depth. On March 19 at 5:16 p.m. HST, a magnitude-3.2 earthquake occurred 14 km (9 mi) south of Fern Acres at 6 km (4 mi) depth.

Deformation signals are consistent with refilling of KÄ«lauea Volcanoâ€™s deep East Rift Zone (ERZ) magma reservoir. Sulfur dioxide emission rates on the ERZ and at KÄ«laueaâ€™s summit remain low and have been steady over the past several weeks.

A GPS station on the north flank of PuÊ»u Ê»ÅŒÊ»Å has been showing steady slumping of the craters edge. This motion is not directly related to magmatic activity but is interpreted to be sliding of the unstable edge of the PuÊ»u Ê»ÅŒÊ»Å cone. Small collapses at PuÊ»u Ê»ÅŒÊ»Å have occurred since the eruption due to instability.

Hazardous conditions still exist at both the lower ERZ and summit of KÄ«lauea. Residents and visitors in the lower Puna District and KÄ«lauea summit areas on the Island of HawaiÊ»i should stay informed and heed Hawaiâ€˜i County Civil Defense closures, warnings, and messages (http://www.hawaiicounty.gov/active-alerts). HVO continues to closely monitor KÄ«lauea for any sign of increased activity.

The USGS Volcano Alert level for Mauna Loa remains at NORMAL.

Please visit HVOâ€™s website (https://volcanoes.usgs.gov/hvo) for past Volcano Watch articles, KÄ«lauea and Mauna Loa updates, volcano photos, maps, recent earthquake info, and more. Call 808-967-8862 for weekly KÄ«lauea updates. Email questions to askHVO@usgs.gov.