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Volcano Watch: Kilauea activity update for April 25, 2019

Time-lapse panorama of the Kīlauea Caldera Wide Angle from HVO Observation Tower. April 18-25, 2019. Images courtesy of USGS/HVO
This time-lapse video is via images from a temporary monitoring camera on the west rim of Kilauea Caldera April 18-25, 2019. The camera is looking E towards the bottom of the newly enlarged Halemaʻumaʻu crater, although the deepest part of the crater is not visible from this vantage point. The crater from left to right (roughly NNE to SSW) is approximately 1 km (0.6 mi) across. The depth of the crater in the visible image from the rim is several hundred meters.

(Activity updates are written by scientists at the U.S. Geological Survey’s Hawaiian Volcano Observatory.)

Kῑlauea Volcano is not erupting and its USGS Volcano Alert level remains at NORMAL.

Rates of seismicity, deformation, and gas release have not changed significantly over the past week. Deformation signals are consistent with refilling of Kīlauea’s deep East Rift Zone (ERZ) magma reservoir. Sulfur dioxide emission rates on the ERZ and at Kīlauea’s summit remain low.

Two earthquakes with three or more felt reports occurred in Hawaiʻi this past week:a magnitude-2.9 quake 4 km (2 mi) southwest of Volcano at 0 km (0 mi) depth on April 20 at 3:58 p.m. HST, and a magnitude-3.4 quake 19 km (12 mi) southeast of Waikoloa Village at 16 km (10 mi) depth on April 18 at 2:27 p.m. HST.  

Hazards remain at the lower ERZ and summit of Kīlauea. Residents and visitors near the 2018 fissures, lava flows, and summit collapse area should heed Hawai‘i County Civil Defense and Hawaiʻi Volcanoes National Park closures and warnings. HVO continues to closely monitor Kīlauea for any sign of increased activity.

The USGS Volcano Alert level for Mauna Loa remains at NORMAL, which means that the volcano is in typical background or noneruptive state.

Please visit HVO’s website (volcanoes.usgs.gov/hvo) for past Volcano Watch articles, Kīlauea and Mauna Loa updates, volcano photos, maps, recent earthquake info, and more. Call 808-967-8862 for weekly Kīlauea updates. Email questions to askHVO@usgs.gov.

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