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Volcano Watch: Kilauea activity update for April 18, 2019

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

This time-lapse video April 11-18, 2019 is via images from a temporary monitoring camera on the west rim of Kilauea Caldera. 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.

Ká¿‘lauea 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 and have been steady over the past several months.

Four earthquakes with three or more felt reports occurred in HawaiÊ»i this past week, all on April 13:  a magnitude-2.3 quake 20 km (12 mi) southeast of Waikoloa at 13 km (8 mi) depth at 6:12 p.m. HST; a magnitude-2.6 quake 18 km (11 mi) east of Kalaoa at 15 km (9 mi) depth at 5:31 p.m. HST;  a magnitude-3.0 quake 16 km (10 mi) northeast of Kalaoa at 14 km (9 mi) depth at 5:20 p.m. HST; and a magnitude-5.3 quake 20 km (12 mi) east of Kalaoa at 13 km (8 mi) depth at 5:09 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.

Please visit HVO’s website ( 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

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