Volcano Watch: Kilauea activity update for April 4, 2019

Time-lapse movie of Halemaumau Crater. March 28-April 4, 2019. Images courtesy of USGS/HVO

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

The USGS Volcano Alert level for Kῑlauea, which is not erupting, is 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 Volcano’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 weeks.

Three earthquakes with three or more felt reports occurred in Hawaiʻi during the past week: a magnitude-2.8 quake 26 km (16 mi) west of Pepeʻekeo at a depth of 33 km (21 mi) on April 1 at 9:42 p.m. HST; a magnitude-3.4 quake 10 km (6 mi) northeast of Pāhala at a depth of 31 km (19 mi) on March 31 at 7:49 a.m. HST; and a magnitude-3.7 quake 2 km (1 mi) southeast of Kapaʻau at a depth of 38 km (24 mi) on March 29at 8:29 p.m. HST. 

Hazards still exist 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 (https://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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