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Volcano Watch: Kilauea activity update for September 8, 2016

September 8, 2016 Ocean Entry Broadens from Mick Kalber on Vimeo.

Video courtesy of Tropical Visions Video with air transportation by Paradise Helicopters.


Time-lapse movie of Halemaʻumaʻu Overlook Vent from Hawaiian Volcano Observatory. September 1-8, 2016. Images courtesy of USGS/HVO


Time-lapse movie of Halemaumau Overlook Vent and deformation electronic tilt graph showing inflation of Kilauea summit. September 1-8, 2016. Images courtesy of USGS/HVO


Time-lapse thermal image movie of Halemaumau Overlook Vent. September 1-8, 2016. Images courtesy of USGS/HVO


Time-lapse movie of KÄ«lauea Caldera from Hawaiian Volcano Observatory. September 1-8, 2016. Images courtesy of USGS/HVO

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

Kīlauea continues to erupt at its summit and East Rift Zone. During the past week, in concert with summit inflation and deflation, the summit lava lake level varied between about 16 m and 36.5 m (52–120 ft) below the vent rim within Halema‘uma‘u Crater. On the East Rift Zone, the “61g” lava flow continued to enter the ocean. The lava flow does not pose an immediate threat to nearby communities.

Mauna Loa is not erupting. Seismicity remains elevated relative to the long-term background rate, with earthquakes occurring mostly in Mauna Loa’s south caldera and upper Southwest Rift Zone at depths less than 5 km (3 mi). Global Positioning System (GPS) measurements show deformation related to inflation of a magma reservoir beneath the summit and upper Southwest Rift Zone, with inflation occurring mainly in the southwestern part of the magma storage complex.

Four earthquakes were reported felt on the Island of Hawaiʻi this past week. On September 7, 2016, at 2:03 p.m., HST, a magnitude-2.7 earthquake occurred 1.6 km (1.0 mi) southwest of Kīlauea’s summit at a depth of 1.1 km (0.7 mi). On September 6 at 4:25 a.m., a magnitude-4.0 earthquake occurred 3.6 km (2.2 mi) south-southeast of Mauna Loa’s summit at a depth of 1.2 km (0.7 mi). On September 3 at 8:05 p.m., a magnitude-3.3 earthquake occurred 5.1 km (3.2 mi) southeast of Waimea at a depth of 14.9 km (9.3 mi). On September 1 at 12:11 a.m., a magnitude-3.7 earthquake occurred 25 km (15.5 mi) southeast of Waimea at a depth of 24.6 km (15.3 mi).

Please visit the HVO website (http://hvo.wr.usgs.gov) for past Volcano Watch articles, KÄ«lauea daily eruption updates, Mauna Loa weekly updates, volcano photos, recent earthquakes info, and more; call for summary updates at 808-967-8862 (KÄ«lauea) or 808-967-8866 (Mauna Loa); email questions to askHVO@usgs.gov.

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